Best Flowering Annuals for Summer (Easy-Care Picks That Bloom All Season)

Discover the best flowering annuals for summer, including easy-care flowers that bloom all season. Expert tips for garden beds and containers.

When the dog days of summer arrive, it can be challenging to keep gardens thriving. But flowering annuals are like your best gardening friends — they can withstand sweltering heat and high humidity while still keeping the garden colorful and full of life.

After more than 30 years of gardening in Zone 6b New Jersey, I’ve grown just about every type of flowering annual you can imagine. Through heat waves, humid summers, and unpredictable weather, I’ve learned which annuals truly thrive, not just survive, when summer conditions are at their toughest.

Many of these resilient blooms deliver vibrant color all season long with minimal effort, making them a great choice for garden beds, containers, and cut flower gardens. Today, we’re exploring easy-care flowering annuals that bloom in summer, along with practical planting tips to help you transform your garden.

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Why Flowering Annuals Are Perfect for Summer Gardens

Whether you’re new to gardening or have years of experience, flowering annuals are one of the easiest ways to add bold, reliable color during the summer months.

Annual flowers complete their life cycle in a single growing season, which means they grow quickly and bloom generously. While perennials return each year, they often have shorter bloom windows. Annuals, on the other hand, are unmatched when it comes to filling gaps and keeping gardens colorful from early summer through frost.

After decades of gardening, I rely on annuals every year to carry my garden through the hottest part of the season, especially when perennials take a break or fade between bloom cycles.

Instant Color with Minimal Wait

One of the biggest advantages of flowering annuals is how quickly they perform. Within weeks of planting, they burst into bloom and continue producing flowers for months, creating an immediate visual impact in garden beds and containers.

Easy-Care and Beginner Friendly

Most annual flowers are low-maintenance and forgiving, making them ideal for busy gardeners or beginners. With basic care like regular watering, occasional feeding, and simple deadheading, many annuals will reward you with continuous blooms all season long.

In fact, many annuals grown in cut flower gardens respond even better to regular cutting because the more you harvest, the more they bloom.

If you’d like more information about cut flower gardening, I’ve got a great guide for beginners. Please visit: Cut Flower Gardening for Beginners

Versatile for Any Garden Space

Flowering annuals are incredibly versatile. They work just as well in garden beds as they do in containers, hanging baskets, window boxes, and cut flower gardens. This flexibility makes it easy to experiment with color combinations and plant styles, no matter the size of your outdoor space.

Best Flowering Annuals For Vibrant Summer Blooms

Now that we’ve covered the benefits of annuals, let’s explore some of the best flowering annuals that will bring vibrant color and joy to your summer garden. Here are some of the best blooms for non-stop beauty.

Petunias (Reliable Summer Color for Beds and Containers)

Petunias are a classic choice for summer annuals. There are several different varieties that come in a wide range of colors and are well-known for their long-lasting blooms. Whether you prefer solid shades or vibrant patterns, petunias will definitely steal the show with their beauty.

I just planted several in my gardens from Proven Winners that include:

• Supertunia Vista Bubblegum
• Supertunia Latte
• Supertunia Mini Vista Indigo
• Supertunia Vista Fuschia
• Supertunia Daybreak Charm
• Supertunia Hoopla Vivid Orchid
• Supertunia Vista Jazzberry
• Supertunia Saffron Finch
• Supertunia Mini Vista Sweet Sangria

Superbells (Calibrachoa) Heat-Loving Annuals for Containers and Hanging Baskets

Superbells, with their bell-shaped flowers, are a charming addition to any garden. These annuals are excellent trailing plants, perfect for hanging baskets or cascading over garden edges.

Their profusion of blooms will keep your garden vibrant and colorful throughout the summer. This year I’m growing some new-to-me superbells from Proven Winners and they are doing so well! I just planted some in my containers. Here is what I’m growing this year. 

• Superbells Prism Pink Lemonade
• Superbells Double Smitten Pink
• Superbells Double Redstone
• Superbells Double Vintage Coral
• Superbells Double Chiffon

Geraniums (Pelargonium): Reliable Summer Annuals for Beds and Containers

Geraniums are beloved for their vibrant flowers and distinctive foliage. These versatile annuals come in a wide range of colors, including shades of red, pink, white, and purple, allowing you to create captivating color schemes in your garden.

Geraniums are known for their long blooming period, ensuring a summer filled with continuous bursts of color. They are also valued for their aromatic leaves, which emit a pleasant fragrance when touched.

Geraniums thrive in sunny locations, making them ideal for garden beds, borders, or containers. They are relatively low-maintenance, requiring well-draining soil, and regular watering.

With their sturdy nature, geraniums can tolerate heat and withstand dry conditions, making them a reliable choice for the dog days of summer.

Whether you choose to plant them en masse for a dramatic effect or sprinkle them throughout your garden for pops of color, geraniums are sure to add a touch of elegance and timeless beauty to your summer oasis.

This year, I planted:

• Mojo Dark Pink
• Elegance Cherry Bomb

I like to overwinter mine in zone 6b year after year so I don’t have to rebuy them every season. If you’d like to try it too, please visit my full guide here: Overwintering Geraniums

Marigolds: Easy-Care Annuals for Summer Color and Pest Control

Marigolds are not only beautiful but also practical. Their bright, cheerful flowers have long been used in companion planting, and many gardeners grow them to help discourage certain insects when planted near vegetables and outdoor living spaces. I use them all the time in the potager around my edible plants and they not only help with pests but also ramp up the color around all the greenery.

These hardy annuals tolerate heat well and adapt to a wide range of soil conditions, making them an easy choice for summer gardens.

One of the best things about marigolds is their long-lasting appeal. They look great in late spring, continue blooming through summer, and often shine well into fall until the first frost. Because of their long season of color, marigolds are a budget-friendly option, delivering months of impact from a single planting.

Border Dahlias: Compact Summer Annuals with Big, Bold Blooms

Border dahlias are a showstopper when it comes to summer blooms. These stunning flowers come in a wide array of colors making them a favorite among gardeners. They can often be found at garden centers and nurseries when they start getting in their summer flowering annuals.

I’ve grown them for several years and they look wonderful planted in the front of borders.

Keep them well fed, deadhead them throughout the season, and you’ll get an abundance of blooms from spring through fall. 

These are not to be confused with dahlias which are tall flowers. Instead, border dahlias are smaller and more compact. I picked up a few at the nursery this year for the zen garden.

Here’s what I’m growing – both are from Proven Winners.

• Dahlia Dalina Grande Cancun
• Dahlia Dalina Grande Mendoza

To learn more about how I grow dahlias in my gardens, please visit: How to Grow Dahlias and How to Grow Dahlias in Pots

Snapdragons: Cool-Season Annuals That Extend the Bloom Season

Snapdragons are classic annuals that bring vertical interest to your garden beds. These charming flowers look amazing in cottage gardens. come in a wide range of colors and bloom profusely throughout the late spring, summer, and fall.

Snapdragons are versatile and can be used as cut flowers or left to enhance your garden’s beauty. To keep them looking amazing during the warmer months, keep them well hydrated. 

A few years ago, we had an extremely hot and dry summer. My snapdragons were in a garden with irrigation that kept them well-hydrated 3 days a week in good well-drained soil and they never skipped a beat!

I started several different varieties from seed this year too. Here’s what I’m growing.

• Madame Butterfly Bronze with White
• Madame Butterfly Rose
• Potomac Pink
• Bridal Pink
• Costa Apricot
• Legend Light Pink

To learn more about growing snapdragons, please visit my comprehensive guides here:

• How to Grow Snapdragons
• Starting Snapdragon Seeds

Zinnias: Heat-Loving Annuals That Bloom All Summer

Zinnias are a popular choice for gardeners seeking vibrant and long-lasting summer flowers. These cheerful blooms come in a variety of colors, including red, orange, yellow, pink, and purple.

Zinnias are easy to grow from seeds and require minimal care once established. They are loved by butterflies and make a great cut flower for bouquets.

​They are one of my favorite flowers to grow. Here is what I’m growing this year:

• Benary’s Giant Wine
• Queen Lime Orange
• Senorita
• Queen Lime Blush
• Benary’s Giant Carmen Rose
• Uproar

To learn more about how I grow gorgeous zinnias, please visit my comprehensive guide here: How to Grow Zinnias

And if you are just starting out with cut flower gardening, please check out my full guide here: Cut Flower Gardening for Beginners

Gomphrena: Heat-Loving Annuals for Summer Gardens and Cut Flowers

Gomphrena, also known as globe amaranth, is a charming and hardy annual flower that thrives in the heat of summer.

Its unique globe-shaped blooms come in a variety of colors, including vibrant shades of purple, red, white, and pink flowers.

Gomphrena’s compact growth habit and long-lasting blooms make it a great choice for borders, containers or cut flower arrangements.

This resilient annual can withstand high temperatures and dry conditions, making it a true gem in the summer garden.

With gomphrena added to your collection of flowering annuals, you’ll have yet another easy-care and heat-loving plant to enhance your garden’s beauty and bring a touch of whimsy to your outdoor space.

This year, I am growing: ‘Truffula Pink’ by Proven Winners and QIS Purple from seed. To learn more about how to grow gomphrena, please visit my full guide here: Growing Gomphrena in Your Cutting Garden

Sunflowers: Bold Summer Annuals for Height and Late-Season Color

Sunflowers are a true symbol of summer, with their vibrant yellow petals and towering presence. These annual giants never fail to bring a smile to our faces and brighten up any garden.

Sunflowers come in various sizes, from dwarf varieties perfect for containers to towering specimens that can reach impressive heights.

Not only are they visually striking, but sunflowers also attract pollinators and birds with their abundant nectar and seeds. They thrive in full sun, soaking up the rays and adding a radiant burst of color to our outdoor spaces.

Planting sunflowers in your garden beds or containers is a fun way to celebrate the warmth and beauty of summer. Their bold presence and sunny dispositions will infuse your garden with an undeniable sense of happiness and optimism. I start them every year from seed and have grown several different varieties both for my borders and a vase.

To extend their bloom time, sow several different varieties of sunflowers and plant them in succession.

This means, that even if you are only growing one type of sunflower, you’d start them one week, then wait a week to sow them again, and then another week to start them again.

Because many sunflowers are one and done, succession sowing will help them bloom longer in the garden. This year, I planted Sunflower ‘Royal Hybrid’ and ‘Strawberry Blonde’.

To learn more about growing sunflowers, please visit my full guide here: How to Grow Sunflowers

Celosia: Long-Blooming Annuals for Summer Color and Cut Flowers

Celosia, also known as cockscomb, is a unique annual with striking, velvety flower heads that resemble flames or brain-like shapes.

These vibrant blooms come in rich shades of red, orange, and yellow. Celosia is drought-tolerant and thrives in sunny locations, making it an ideal choice for summer displays.

They not only look great in the garden, but also look amazing in cut flower arrangements too.

Last year, I had several self-seeders from the prior owner’s garden. They were a pleasant surprise and I’ve learned they return yearly for me here in zone 6b. So, the only time I start them from seed anymore, is when I want to grow a new variety.

To learn more about how to grow celosia, please visit: How to Grow Celosia

Soothing Annual Flowers for a Calming Garden

Create your own peaceful sanctuary with these soothing annual flowers. Transform your garden into a haven of tranquility with soft pinks, calming purples, cool blues, and serene whites.

Impatiens: Shade-Loving Annuals for Summer Color

Impatiens are annual flowering plants that enjoy partial sun to full shade and are a great addition to those darker corners of your garden. They are low-maintenance plants that are available in a variety of shades, from soft pastels to vivid hues. 

This year, I’m growing:

• New Guinea Impatiens
• Proven Winners Impatiens Walleriana Rockapulco Double Impatiens ‘Tropical Shades’

Begonias: Easy-Care Annuals for Containers and Garden Beds

Begonias are versatile annual shade flowers that also thrive in partial to full shade gardens. Their waxy leaves and vibrant blooms add a touch of elegance to any garden. With proper care, begonias can bloom all summer long and even into fall.

They look amazing in container gardens too! These are the varieties I’m growing this year.

• Proven Winners Double Delight Rose Begonia
• Proven Winners Double Delight Apple Blossom

Begonias also overwinter well, so I’ve been saving some of my plants to save a little money the following season. If you’d like to try saving them for next year too, please check out my full guide here: How to Overwinter Begonias

Verbena: Long-Blooming Summer Annuals That Attract Pollinators

Verbena is a stunning annual flower that offers a profusion of vibrant blooms throughout the summer season.

Available in a variety of colors, including shades of purple, pink, red, and white, verbena adds a burst of color and visual interest to your garden beds, borders, or containers.

Its clusters of small, delicate flowers create a carpet of beauty that attracts butterflies and hummingbirds, bringing life and movement to your outdoor space.

One of the many benefits of verbena is its ability to tolerate heat and thrive in full sun. These hardy annuals can withstand the high temperatures of summer, making them an excellent choice for gardens in warm climates.

They also have a long blooming period, ensuring that your garden remains vibrant and colorful throughout the season.

Verbena is relatively low-maintenance, requiring well-drained soil and regular watering. Deadheading spent flowers will encourage continuous blooming and help maintain a neat appearance.

With its versatility and resilience, verbena is a fantastic option for both beginner and experienced gardeners looking to add a touch of charm and color to their summer landscapes.

This year, I’m growing Proven Winners ‘Superbena Pink Cashmere’.

Bacopa: Trailing Annuals for Containers and Hanging Baskets

Bacopa, also known as Sutera, is an excellent choice for cascading over the edges of containers or hanging baskets. These dainty white, pink or purple flowers create a delicate look while they soften the hard lines of containers and rock borders. 

Bacopa is a heat-tolerant annual that requires minimal care, making it perfect for busy gardeners. I grow it every year in my planters to get that beautiful trailing effect.

This year, I filled a few containers with Proven Winners Snowstorm Giant Snowflake. Isn’t it so pretty?

Cosmos: Easy-Care Annuals with Airy Summer Blooms

Cosmos are popular annual flowers known for their feathery foliage and daisy-like blooms. They come in various shades of pink, white, and purple, adding a touch of whimsy to your garden.

Cosmos are not only beautiful but also attract butterflies and pollinators, creating a lively ecosystem in your outdoor space. They are also commonly grown in cut flower gardens too. Here’s what I’m growing this year! And I started them all from seed.

• Cosmos Apricot Lemonade
• Cosmos Double Click Pink
• Cosmos Double Click White

If you’d like to learn more about growing cosmos, please visit my full guide here: How to Grow Cosmos.

Scaevola: Heat-Tolerant Trailing Annuals for Containers

Scaevola, also known as fan flower, is a charming annual that boasts a distinctive fan-shaped bloom. Its cascading clusters of delicate flowers come in shades of blue, lavender, pink, and white, adding a delightful pop of color to your garden.

Scaevola is particularly well-suited for hanging baskets, containers, or as a ground cover, as its trailing nature creates a lovely trailing effect.

One of the standout features of scaevola is its ability to thrive in hot and dry conditions, making it an excellent choice for summer gardens. I love growing them in hanging baskets on my porch.

It is a low-maintenance plant, requiring well-draining soil and regular watering, but it can tolerate periods of drought. Scaevola’s blooms are also known to attract butterflies, adding an enchanting touch to your garden as they flutter about.

Last year, I filled my hanging baskets and porch planters with purple scaevola flowers. They did really well there and bounced back with ease if they were underwatered on occasion. Of course, I don’t recommend underwatering them, but I found them to be more resilient than other flowering annuals.

But this year, I planted Proven Winners ‘Whirlwind Pink’ in a few of the containers in the zen garden.

Whether you’re seeking a trailing beauty for your containers or a ground cover to fill empty spaces, scaevola is sure to captivate with its unique fan-shaped flowers and resilience in the summer heat.

Euphorbia: Airy Annuals for Containers and Mixed Plantings

Euphorbia, like ‘Diamond Frost’ from Proven Winners is a fantastic choice for adding texture and interest to your garden.

Its small white flowers are surrounded by delicate, lacy foliage, creating an enchanting effect.

Euphorbia is drought-tolerant and thrives in sunny spots, making it a resilient and low-maintenance annuals that fills in the gaps and weaves around other easy annual flowers. I plant it every year in both containers and garden borders as a beautiful filler plant.

Sweet Alyssum: Low-Growing Annuals with Fragrant Summer Blooms

Sweet alyssum is a graceful and fragrant annual flower that thrives in the heat of summer. With its clusters of tiny, dainty flowers, sweet alyssum adds a touch of elegance and charm to any garden setting. The blooms come in shades of white, pink, and purple, creating a soft and romantic atmosphere.

Not only does sweet alyssum provide a visually pleasing display, but its sweet fragrance also fills the air, making it a delight for the senses.

This low-growing annual is perfect for border edges, rock gardens, or as a ground cover. It withstands the heat with ease and requires minimal care, making it an ideal choice for both beginner and experienced gardeners alike.

Including sweet alyssum in your summer garden will bring a touch of delicacy and a sweet scent that will captivate both you and your visitors. I plant mine every spring to get the carpet of color at the front of my beds.

Angelonia: Heat-Loving Annuals with Upright Summer Blooms

Angelonia, also known as summer snapdragon, is a heat-loving annual that thrives in hot climates. Its upright spikes of vibrant flowers come in shades of purple, pink, and white. Angelonia is not only stunning but also attracts butterflies, making it a delightful addition to your summer garden.

This year, I’m growing it in both my hanging planters and planters on the porch. It’s one of the best container plants because it gets a little height and drapes over the edges to soften the edges. 

Here’s what I’m growing this year:

• Proven Winners ‘Angelface Cascade Blue’
• Proven Winners ‘Angelface Cascade Pink’

Flowering Annuals With Fiery Reds and Oranges to Kick Up the Summer Heat

Ignite your summer garden with a fiery explosion of reds and oranges! Discover these dazzling annual flowers that bring the heat and turn up the excitement.

Tropical Hibiscus: Bold Summer Annuals with Exotic Blooms

Tropical hibiscus is truly a showstopper with its large, flamboyant, and colorful flowers. These annuals add a touch of the exotic to your garden, with blooms in vibrant shades of red, pink, orange, and yellow. Tropical hibiscus thrives in warm climates and requires ample sunlight and well-drained soil. They are easy to grow and the hummingbirds love them!

I plant at least one every year in containers to ramp up the tropical vibes in my outdoor living spaces here in zone 6b. Some gardeners successfully overwinter them. I tried once years ago but it was a struggle to keep it going indoors and didn’t thrive once I got it back outdoors the following season.

Lantana: Heat- and Drought-Tolerant Annuals for Summer Color

Lantana is a resilient annual that blooms abundantly in hot, sunny conditions. Its clusters of small flowers come in a range of colors, including shades of orange, pink, and purple.

Lantana attracts butterflies and hummingbirds, adding life and movement to your garden. This year, I’m growing Luscious Royale Cosmo from Proven Winners and I LOVE IT! The clusters of flowers range from bright pink to yellow and orange. The blooms are truly beautiful!

Calendula: Cool-Season Annuals with Cheerful Early Summer Blooms

Calendula, also known as pot marigold, are one of my favorite annual flowers with vibrant orange, yellow and creamy white flowers.

Apart from its striking appearance, calendula has medicinal properties and is often used in herbal remedies. Planting calendula in your garden beds or containers adds both beauty and functionality.

But they also make wonderful companion plantings for vegetable gardens as they are attract pollinators and help draw pests away from plants.

Last year, I started about 36 plants from seed, planted them all, and the resident rabbits decimated them. So if rabbits are problem in your garden, you’ll need to protect them. 

Here’s what I’m growing this year.

• Calendula ‘Ivory Princess’
• Calendula ‘Orange Flash’

To learn more about how to grow calendula, please visit my full guide here: Growing Calendula

Strawflowers: Summer Annuals Perfect for Cutting and Drying

Strawflowers, also known as everlasting flowers, are a unique and eye-catching annual. These flowers are prized for their papery petals that retain their color and shape even after drying. They come in various shades of yellow, orange, pink, and white, adding texture and interest to your garden.

Strawflowers are drought-tolerant and thrive in sunny locations, making them a perfect choice for summer displays and dried flower arrangements.

This year, I’m growing from seed:

• Strawflower Apricot Mix

I plant these every year in my zone 6b garden and they perform so well as I get armloads of blooms for both bouquets, arrangements, and wreaths. To learn more about growing strawflowers in your garden, please visit my full guide here: How to Grow Strawflowers

And if you’d like to get more information about drying flowers, I have a full guide here: How to Dry Flowers

Coleus: Colorful Foliage Annuals for Sun or Shade

While they aren’t revered as much for their flowers, coleus is a popular annual known for its stunning foliage, which comes in a wide array of colors, patterns, and textures. From vibrant shades of green, red, purple, and yellow to intricate patterns of stripes and speckles, coleus leaves are truly captivating.

What makes coleus even more exciting is its ability to thrive in both sun and shade, allowing for flexible placement in your garden. These easy-care plants are perfect for adding a splash of color to garden beds, borders, or containers.

Coleus can also be used as a focal point or to create eye-catching combinations with other flowering annuals. In addition, some varieties of coleus produce small, inconspicuous flowers, while others are grown solely for their foliage.

One of the benefits of coleus is its adaptability to different light conditions. While some varieties prefer full sun, others can tolerate partial shade or even thrive in full shade. This makes coleus an excellent choice for areas with varying levels of sunlight throughout the day.

To care for coleus, provide well-draining soil and regular watering. Pinching back the plant’s growing tips will encourage bushier growth and prevent it from becoming leggy.

This year, I’m growing the following varieties from Proven Winners.

• Colorblaze Strawberry Drop
• Colorblaze El Brighto
• Colorblaze Newly Noir

I’ve noticed it pop up the following season in random places in my garden. Not in an overwhelming way, but I have seen them reseed before. I simply dig up these volunteers and replant them in other areas of my garden.

Tithonia: Tall Summer Annuals That Attract Pollinators

Tithonia, commonly known as the Mexican sunflower, is an exceptional annual that thrives in the heat of summer. With its tall, branching stems and large, fiery orange or red blooms, tithonia commands attention in any garden.

These striking flowers not only add a bold pop of color but also attract a myriad of pollinators, including butterflies and bees. Tithonia is known for its resilience and ability to tolerate hot and dry conditions, making it a great choice for gardens in regions with scorching summers.

Whether planted in borders or used as a focal point in your landscape, tithonia is sure to make a stunning statement and create a haven for pollinators.

I’ve noticed tithonia hits its stride in late summer/early fall here in zone 6b. But when it does? It is magical as butterflies and bees flock to it.

Planting Flowering Annuals in Garden Beds and Containers

Once you’ve chosen the best flowering annuals for your space, proper planting and basic care will help them thrive throughout the summer.

Planting Annuals in Garden Beds

• Choose a sunny or shady location based on the plant’s needs.
• Improve soil drainage and fertility with compost if needed.
• Plant at the same depth as the nursery container and water well after planting.
• Mulch lightly to retain moisture and suppress weeds.

For a complete beginner-friendly walkthrough, see my Gardening 101: A Guide for Beginners.

Planting Annuals in Containers

• Use containers with drainage holes and a high-quality potting mix.
• Select pots large enough to support root growth.
• Water thoroughly after planting and monitor moisture closely during hot weather.

If you’re new to container gardening or want more design tips, my Container Gardening Guide covers everything in detail.

Ongoing Summer Care

• Water consistently, especially during heat waves.
• Fertilize regularly to support continuous blooming. I like to use this slow-release fertilizer and bloom booster during the growing season.
• Deadhead flowering annuals when needed to encourage more blooms. To learn best practices, please see my full guide here: How to Deadhead Flowers

By choosing the right plants and giving them simple, consistent care, flowering annuals will reward you with vibrant color in garden beds and containers all summer long.

More About Growing Flowering Annuals in Summer

I am a huge proponent of planting flowering annuals in summer because they provide steady color and reliable blooms when gardens need it most. After decades of gardening, I’ve found that annuals are essential for filling gaps, refreshing tired spaces, and keeping beds and containers looking vibrant from early summer through the first frost.

Whether you’re planting in garden beds, containers, or a cut flower garden, choosing the right annuals for your light and growing conditions makes all the difference. If you’re just getting started, my Gardening 101: A Guide for Beginners walks through the basics step by step.

For gardeners who love growing flowers in pots and outdoor living spaces, Container Gardening offers tips on selecting containers, designing combinations, and caring for plants throughout the season.

Flowering annuals also pair beautifully with perennials, helping to extend color while perennial plants move through their natural bloom cycles. If you’re deciding how to balance the two, you may also enjoy learning more about how annuals and perennials work together in a well-planned garden.

By selecting proven summer annuals and giving them simple, consistent care, you can enjoy nonstop blooms and a garden that looks beautiful all season long.

What is your flowering annual for summer? Share your summer garden successes! Post photos of your blooming annuals and tell me more in the comments below.

For more information about growing annual flowers, please see the following cooperative extension articles:

• Cornell Cooperative Extension
• University of Massachusettes Amherst Cooperative Extension
• Extension of Missouri

Happy gardening!