Every summer for the last 15 years, friends and family visiting my home have walked through a mass display of dahlias on their way to the front door. And luckily for us gardeners, dividing them to propagate more is incredibly easy.
I started with huge clumps of tubers dug out of my aunt’s garden. She was sick of growing the same color year after year, a prolific, hardy, vibrant pink dahlia with a creamy-yellow center, whose name she couldn’t remember.
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Despite a lot of searching on dahlia websites and trawling through dozens of entries in the American Dahlia Society’s Online Classification Guide, I still have no idea which variety gave me such delight for so many years.
They were my first dahlias and I loved them from the moment they first began to bloom. I wasn’t previously a fan of pink, but it was a good thing I saw the light. These dahlias produced hundreds of flowers every year with very little effort on my part.
If you are new to growing dahlias, check out our guide for full cultivation instructions.
In this article, we will cover how and when to divide tubers to expand your dahlia garden. I wouldn’t expect any beginner to know intuitively how to divide these. I certainly didn’t!
Fortunately you can start off on the right foot, with the following tips.
Here’s everything we’ll cover in this guide:
The 3 Important Parts of the Tuber
Tubers hold the gold that will become next summer’s spectacular flowers. A healthy one is firm, plump, and can be almost any size or shape, from bulb-like, to long and round like a yam, to quite slender like a young carrot.
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