Should You Save Dahlia Tubers? How I Decide What’s Worth Overwintering

Should you save dahlia tubers? Here’s how I decide which dahlias are worth overwintering and when I’d rather start fresh.

There was a time when I felt like if I grew a beautiful dahlia, I had to dig up the tubers and save them for next year.

After all, dahlia tubers aren’t exactly cheap. And if you’ve already grown a variety you love, why wouldn’t you save it?

Well…because sometimes you’re tired. 😂

I’ve been gardening for nearly 30 years and growing dahlias for about eight, and these days, I’m much more realistic about what I can and want to do at the end of the gardening season.

I’ve overwintered dahlia tubers plenty of times over the years, so I know the process works. But my gardens are pretty expansive, and fall is busy here. I’m cutting things back, cleaning up beds, planting, dealing with leaves, preparing containers and getting the rest of the property ready for winter. By the time my dahlias are ready to come out of the ground, digging, cleaning, labeling, storing and monitoring a whole collection of tubers can feel like one job too many.So I don’t always do it.

Is buying new tubers every year the most cost-effective way to grow dahlias? Definitely not.

But sometimes, easy wins.

And there’s another part of this that I really enjoy: shopping for new dahlia tubers in the middle of winter. When the garden is sleeping and I’m already missing flowers, browsing varieties and dreaming about what I’ll grow next gives me something to look forward to.

So should you save your dahlia tubers?

Maybe.

Here’s how I decide.

(Posts on stacyling.com may contain affiliate links. Click HERE for full disclosure.)

A stone tiered fountain stands in the center of a cut flower garden, surrounded by blooming pink and purple dahlia flowers and green foliage, with trees and a brick pathway in the background.

Do You Have to Save Dahlia Tubers?

No. And I think this is important to say because gardening advice can sometimes make every task feel like something we should be doing.

Dahlias are tender perennials, so what happens when winter arrives depends on where you garden. Here in my Zone 6b New Jersey garden, I don’t rely on my dahlias surviving outdoors through winter. If there’s a particular plant I want to carry into another season, I need to lift and store its tubers.

But I can also choose to treat that dahlia as an annual and start fresh next year.

That choice doesn’t make one approach better than the other. It comes down to your climate, budget, storage space, time and how much you really want to grow that particular variety again.

Large pink and yellow dahlia flower in full bloom, surrounded by green leaves, with blurred trees and sky in the background. Dahlia variety is Penhill Watermelon

Three vibrant purple dahlias in bloom stand out among green foliage and pink celosia flowers, with a blurred house and trees visible in the background.

Why Saving Dahlia Tubers Makes Sense

There are some very good reasons to overwinter dahlias.

The most obvious is cost. A single tuber can become a larger clump over the growing season, and viable tubers can eventually be divided. Saving what you already have can reduce how much you spend replacing dahlias each year.

It also allows you to hold onto a variety you know performs well in your garden.

That’s something I appreciate more after growing so many different dahlias. Once I’ve spent an entire season with a plant, I know much more about it than I did when I ordered the tuber. I know how tall it gets, how much support it needs, when it starts blooming, how productive it is and, most importantly, whether I love it enough to give it valuable garden space again.

And sometimes there’s a dahlia that’s simply too special to let go.

Those are the tubers I’m most likely to save.

Pom Pom Orange dahlias with round, layered petals bloom in a lush garden. Green leaves and stems surround the flowers, with trees and a building visible in the background. The scene is bright and vibrant.

Why I Don’t Save All of My Dahlia Tubers Anymore

For me, this really comes down to time and energy.

My gardens have grown significantly over the years, and there are only so many hours in a fall day. Saving dahlias isn’t just about digging them up. They need to be handled, labeled and stored properly, and then I need to keep an eye on them through winter.

I know how to do it. I’ve done it plenty of times.

But knowing how to do something doesn’t mean I have to do it every year.

I’ve become much more selective about where I spend my gardening time, and I’d rather put my energy into the jobs that matter most to me than feel guilty because I didn’t save every $10 or $20 tuber in the garden.

Some years I save more. Some years I save only a few favorites. And there may be years when I decide I’m not doing it at all.

That flexibility has made gardening much more enjoyable for me.

Bright purple dahlias with lush green leaves stand tall in a garden, with additional flowers and trees softly blurred in the background under a partly cloudy sky. Dahlia variety is lilac time

Which Dahlia Tubers Are Worth Saving?

When I do decide to dig and overwinter dahlias, I’m much more likely to save a variety when:

It’s difficult to find or replace.
It was particularly expensive.
It performed exceptionally well in my garden.
I absolutely loved the flowers for cutting.
It has sentimental value to me.
I already know I want it in next year’s garden.

My favorites can change from year to year, too. A dahlia that looks irresistible in a catalog doesn’t always earn a permanent place once I’ve actually grown it.

And that’s okay.

Gardening gets easier when we give ourselves permission to stop growing plants simply because we already have them.

Pale yellow and peach dahlia kogane fubuki dahlias bloom in a planter box with lush green leaves and more flowers in the background, outdoors in a beautiful cut flower garden setting.

What Happens If You Don’t Save Dahlia Tubers?

In a cold climate like mine, I approach a dahlia I’m not overwintering as an annual. I enjoy it for the growing season and then let it go.

If I miss it the following year, I can look for another tuber.

And sometimes I don’t miss it at all.

That’s useful information too.

It tells me which plants really deserve space in my garden and which ones I was growing simply because they were already there.

If you’ve decided a particular variety is worth keeping, I walk through my entire process for overwintering dahlia tubers so you can dig and store them properly for next season.

A close-up of a pale pink dahlia flower in a garden, surrounded by green leaves and other flowers, with sunlight filtering through trees in the background.

The Unexpected Reason I Like Starting Fresh

This is the part that probably makes the least financial sense, but I love it anyway.

I really enjoy shopping for dahlias in winter.

By then, my gardens are sleeping, the days are short, and I’m missing having flowers outside. Looking through dahlia varieties gives me that little spark of the growing season again.

I’m already picturing the raised beds full of flowers, thinking about color combinations and imagining what I’ll cut for arrangements.

For me, that’s part of gardening too.

I’m not just buying a tuber. I’m looking forward to spring.

And because I’m not automatically carrying every variety forward, I have room to experiment. I can bring back the dahlias I can’t imagine being without while still leaving space for something I’ve never grown before.

If you’re doing a little winter dahlia dreaming of your own, I’ve rounded up the dahlia varieties I love growing in my cut flower garden. These are varieties I’ve actually grown, so I share what I love about them along with some of the things I’ve learned along the way.

A vibrant garden filled with peach and pink dahlias in full bloom, surrounded by lush green leaves. A bee is perched on one of the flowers. A large tree and a house are visible in the background.

Keep Notes Before You Decide

One thing that makes this decision much easier is keeping track of what happened during the growing season.

By fall, it’s surprisingly easy to forget which dahlia bloomed beautifully all summer and which one needed constant attention.

I like to look at the whole picture: bloom production, height, support needs, flower color, performance in arrangements and whether I’d genuinely be excited to grow it again.

This is also one of the reasons I created my Bricks ‘n Blooms Beautiful and Easy-Care Flower Garden Planner. Keeping those observations in one place gives you something to look back on when you’re planning the following year’s garden instead of trying to remember what happened months earlier.

It doesn’t need to be complicated. Even a note like Thomas Edison: LOVE, needs serious support can be incredibly useful when you’re making decisions next season.

vibrant purple flowers dahlia thomas edison and zinnias with fountain in the cut flower garden with green arbor — Dahlia Thomas Edison is a gorgeous purple dahlia flower

So, Is Overwintering Dahlia Tubers Worth It?

It certainly can be.

Saving tubers can save money, preserve varieties you love and allow you to keep growing plants that have already proven themselves in your garden.

But I’ve stopped looking at overwintering as something I have to do simply because I grow dahlias.

My garden needs to fit my life, not the other way around.

These days, I save the dahlias that feel worth the work when I have the time and energy to do it. Sometimes that’s several varieties. Sometimes it’s only the really special ones. And sometimes I’d rather close out the gardening season, pull up a chair by the fire and spend a winter evening shopping for next year’s dahlias.

I’m completely okay with that.

If you decide yours are keepers, head over to my complete guide on how to overwinter dahlia tubers for the next step. And if you’re starting fresh, my complete guide to growing dahlias will take you through the growing season from planting to those first gorgeous blooms.

Thank you for visiting the blog today!

Enjoy your day! xo