Dreaming of a cottage garden bursting with larkspur? Winter sowing is the key to success! Learn the easiest way to sow larkspur flower seeds with these simple tips.
Larkspur, with its towering spires of jewel-toned blooms, has always been a must-have in my Zone 6b cutting garden. I love them paired with snapdragons in my raised beds. As an avid gardener, I’ve tried my hand at various methods for starting these cool-season beauties from seed.
I used to meticulously sow them indoors under grow lights, carefully tending to each tiny seedling. But over time, I discovered a far simpler and more successful approach that requires much less: winter sowing. Have you tried it yet?
This method, which mimics larkspur’s natural preference for cool temperatures and outdoor conditions, has significantly boosted my germination rates and produced stronger, more resilient seedlings that I don’t need to coddle before planting.
Thus, winter sowing larkspur seeds is the absolute best way to grow them in my garden. If you’re looking to enjoy the full beauty of larkspur in your flower garden, join me as I share the secrets of starting the seeds!
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Getting to Know Larkspur Flower: A Cottage Garden Gem
Larkspur (Consolida ajacis), with its tall, elegant spires of blossoms, is a beloved cottage garden classic. These beautiful flowers (also known as delphinium or knight’s spur) bring a touch of old-fashioned charm and vibrant color to any garden setting.
Native to the Mediterranean region, larkspur has been cultivated for centuries, admired for its delicate beauty and symbolism of love, lightness, and joy. The flowers come in a wide array of hues, including shades of blue, purple, pink, white, and even red.
Larkspur typically reaches heights of 2 to 5 feet, depending on the variety, making it a striking vertical accent in garden borders and bouquets. Its sturdy stems and long vase life make it a favorite among flower farmers and floral designers alike.
Whether gracing a cottage garden with its whimsical charm or adding a touch of elegance to a cut flower garden, larkspur is a beautiful flower that will make a statement. Keep in mind that most larkspur varieties are annuals, but some are biennials (taking two years to complete their life cycle). In my garden, they have reseeded themselves year after year too!
- Hardiness Zone: Larkspur is hardy in Zones 2-10.
- Light: Full sun is best, but some afternoon shade is appreciated in hot climates.
- Soil: Well-drained soil is crucial. Larkspur prefers a slightly alkaline pH.
- Bloom Time: Late spring to early summer.
- Deer Resistance: Larkspur is generally deer-resistant.
Why Winter Sowing Works Wonders for Larkspur Flower
Larkspur, like sweet peas, prefers cool temperatures for germination and growth. Winter sowing mimics their natural growth cycle by exposing the seeds to the fluctuating temperatures and natural moisture of winter. This results in:
- Higher Germination Rates: Larkspur seeds benefit from a period of cold stratification, which winter sowing naturally provides. This leads to more successful germination.
- Stronger Seedlings: Winter-sown larkspur seedlings develop robust root systems and are better equipped to withstand the challenges of the garden.
- Less Work for Me: No more fussing with indoor seed starting setups. I simply sow my seeds in their recylced mini greenhouses and let nature take its course. Easy peasy!
Winter Sowing Larkspur Flower Supplies
- recycled clear plastic containers
- larkspur seeds (I usually order mine from Johnny’s Selected Seeds.)
- organic potting soil
Winter Sowing Larkspur Flower: My Tried-and-True Method
Here’s how I winter sow larkspur, based on my own experience and backed by .edu research:
- Timing is Key: Aim to sow your larkspur seeds in late fall or early winter, before the ground freezes solid. I usually winter sow my larkspur flower in January.
- Container Choice: I use recycled milk jugs or clear plastic clamshell containers with drainage holes.
- Soil Matters: Fill your containers with a good quality potting soil or seed-starting mix that is premoistened. Larkspur prefers well-drained soil.
- Sowing Depth: Sow the seeds shallowly, about ¼ inch deep.
- Location, Location, Location: Place your mini greenhouses in a sunny spot outdoors. Make sure they are in a protected location so nothing messes with your seedlings.
- Patience is a Virtue: Now, wait for spring! The seeds will germinate when the time is right. Keep an eye on the soil and water if it gets dry.
- Transplant Time: Once the danger of frost has passed, transplant your larkspur seedlings into your garden. I have to admit, I have so many seedlings to plant that I get started planting my larkspur a bit earlier. They are already hardened off and I keep an eye on the weather for damaging freezes.
My Simple Winter Sowing Setup
You can learn even more about how to make them and what to do with them in my post, “How to Winter Sow Seeds Outdoors” The fluctuating temperatures and natural precipitation do the rest, and by spring, I have sturdy little sweet pea seedlings ready to be transplanted into my garden.
Zone 6b and Beyond: Is Winter Sowing Right for You?
If you live in a climate with cold winters and a defined frost period, winter sowing is definitely worth a try. It’s particularly well-suited for Zones 3-7, but even gardeners in warmer zones can adapt the technique for early spring sowing. While starting seeds indoors can work, I’ve found that winter sowing produces stronger, healthier larkspur in my Zone 6b garden.
Growing Larkspur Flowers with Success: From Seedling to Bloom
Winter sowing gives your larkspur a strong start, but proper care in the garden is essential to unlock their full potential. Here’s how to ensure your larkspur thrives:
- Light: Provide a location with at least 6 hours of direct sunlight per day. Some afternoon shade can be beneficial in hotter climates.
- Soil: Well-drained soil is crucial for larkspur. Amend heavy clay soil with compost to improve drainage. Larkspur prefers a slightly alkaline pH (around 7.0).
- Thinning Out Seedlings/Spacing: Space plants about 12-18 inches apart to allow for good air circulation.
- Watering: Water regularly, especially during dry periods. Aim for consistent moisture, but avoid overwatering, which can lead to root rot.
- Fertilizing: Feed your larkspur with a balanced fertilizer every 4-6 weeks to encourage strong growth and abundant blooms.
- Supporting: Larkspur can grow quite tall (some varieties reach 5 feet or more!). Provide support with stakes, twine, or grow-through supports to prevent them from flopping over.
- Deadheading: Regularly remove faded flower spikes to encourage continuous blooming and prevent the plants from setting seed prematurely. This can significantly extend the flowering season.
- Pest and Disease Control: Keep an eye out aphids and slugs. Treat any infestations organically and promptly. I shared a great list of organic solutions here. Be mindful of fungal diseases, especially in humid conditions. Ensure good air circulation by spacing plants adequately.
Favorite Larkspur Flower Varieties
Some of my favorite larkspur flower varieties to grow include:
- Fancy Smokey Eyes
- Early Grey
- QIS Light Blue
- QIS Light Pink
Ready to Give Winter Sowing a Try?
I encourage you to experiment with winter sowing larkspur. It’s a simple, effective method that’s perfect for busy gardeners and those who want to maximize their success. Happy gardening!
For more information about growing larkspur flower, please see this article from the Arkansas Cooperative Extension Service.
P.S. Want to learn more? Check out these helpful resources:
- Read more of my Winter Sowing Guide here
- Want to start sweet peas indoors? Read my comprehensive article here about how to start seeds under grow lights anywhere in your home.
To drill down on more beginner gardening techniques and tips, please read these posts:
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Enjoy your day! xo
