Dividing a Dahlia Tuber Clump

Quick Guide to Dividing Dahlia Tubers

If you’re new to dividing dahlia tubers, this quick tutorial walks you through the basics with this example. Even though there are countless videos online, it helps to see the process done on an actual clump with eyes, feeder tubers, mother tubers, and all.

In the demonstration, we look at a tuber attached to the stem that already has a visible eye. These can sometimes develop when the tuber is buried deeply, and the soil covers part of the stem. As long as there's an eye, it’s a keeper.

From there, the process is simply working your way down the clump and identifying each viable tuber. Each “eye” is a potential plant. Some tubers have a single eye, while others may share a node with a neighbor. Both are usable with careful cutting. Older mother tubers can be removed; they are often "spent" from the previous growing season.

Using the right tools makes the job smoother. Zenport 105 snips are great for precision, with a longer 104 option available if you prefer more reach. For larger, tougher clumps, an oscillating saw like the Ryobi model can help. Always remember to disinfect your blades between plants to prevent disease spread.

Dividing tubers is equal parts observation and technique, and with a little practice, it becomes second nature. Stay tuned for more tips on labeling, storing, and preparing your dahlias for the season ahead!