Can I Save My Dahlias for Next Year?

This is one of the most common questions people ask once dahlias start taking off: “Can I keep these for next year?”

The answer is sometimes yes, sometimes not really — and it depends entirely on the type of dahlia.

Traditional dahlias are grown from tubers. According to Longfield Gardens, tubers store energy underground, can be dug, divided, and replanted, and often become larger over time. These are the classics:

• ✓ Dinnerplate dahlias
• ✓ Cut flower varieties
• ✓ Collector-style dahlias

Series like Dahlietta, Dalaya, City Lights, and Venti are typically sold as vegetative or seed-propagated annual dahlias. These are bred very differently than classic tuber types.

Technically, they can form tubers. But realistically, most people do not successfully overwinter them the same way as traditional tuber dahlias. Why? Because these varieties were bred for:

• ✓ Uniformity
• ✓ Controlled growth
• ✓ Reliable retail performance

— not necessarily long-term tuber storage.

There are real advantages to these newer types. Compared to traditional tuber-grown dahlias, vegetative series are often:

• ✓ More uniform
• ✓ More consistent in habit
• ✓ Earlier blooming
• ✓ Cleaner in containers
• ✓ More predictable in production

And importantly, often less prone to virus and inconsistency. This is a major reason growers love them.

Traditional tuber dahlias still dominate in one area: cut flowers. They often produce larger stems, more dramatic flowers, and more unique forms. But they can also be more inconsistent, slower, and less uniform plant-to-plant.

According to information from Longfield Gardens, seed-grown dahlias are genetically variable — meaning offspring may not resemble the parent plant, and color and form can vary widely. That unpredictability is part of the fun, but not ideal for commercial consistency.

This is the real challenge. Dahlias are not frost hardy. In Indiana, wet cold soil, freeze/thaw cycles, and winter moisture can easily rot tubers.

For anyone who loves experimenting — absolutely. But for anyone expecting perfect carryover, same vigor, and same performance next season, that becomes much less reliable with vegetative bedding dahlias.

Modern vegetative dahlias were bred for performance now. Traditional tuber dahlias were bred for long-term collection and cutting. Both have value — they’re just solving different problems.

• ✓ Vegetative dahlias = consistency
• ✓ Traditional tubers = collectability and cut flowers

Part of the beauty of modern dahlias is simply enjoying them while they’re spectacular.

Reference: Longfield Gardens · Ball Seed grower guides · PanAmerican Seed · Michigan State University Extension · Purdue University Extension