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How to grow dahlias from rooted cuttings


There are three ways to grow dahlias: from rooted cuttings, tubers or seed. Rooted cuttings are shoots taken last winter from the basal growth of the parent, rooted into compost and sent out bagged up in plastic, ready for potting up. They usually make smaller plants in their first year, but are big enough for pots, with plenty of flowers. Rooted cuttings are usually bought by mail order from specialist nurseries.

How to do it

step 1


Place the cutting into a 9cm pot and backfill with compost. Firm down.

rooted dahlia cutting


Snip off any buds that form to allow the plant to bulk up. Grow on in 12cm pots.

rooted dahlia tubers


Keep well watered and harden off outdoors on warm days in May or June.

Discuss this project

Talkback: How to grow dahlias from rooted cuttings
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jano2 14/03/2014 at 18:32

do you mean we should buy the cuttings and all you have told us is how to pot them on? I wanted to read how to take cuttings from my dahlias.

Bilje 14/03/2014 at 19:08

The link or whatever it's called has disappeared so I'll just say what I do. Round about now I pot up the tubers in pots or trays using general purpose compost Leaving the crown uncovered.  Water them but don't soak the compost. I have a cold greenhouse but have used a warm windowsill. After a few weeks the shoots appear . When they are about 3 inches tall I use a craft knife and cut them off the tuber including a tiny bit of tuber if I can or you can cut just below a pair of leaves. I use either 3 inch pots singly or maybe 3 in a slightly larger pot. For compost I use general purpose but mixed with grit or perlite. I've discovered they need well drained compost or they rot. Place the cutting into the compost and water to moisten then put pot into polythene bag not forgetting a label. They should be kept just moist and root quite quickly  in my experience. Pot on when you see roots. The original tuber will re sprout and can be planted out when there are no more frosts.

val13 07/04/2014 at 17:57

I have 16 tubers of dahlias but I think it is to cold yet to put out what do I do with them

fidgetbones 07/04/2014 at 18:00

Do you have a warm place you can put them? If so, I would pot them up into largish pots of a good  compost with a little added extra fertiliser. Then water and keep in a warm frost free place. If you do not have a frost free place, Wait a bit before planting out.

Wanna be Gardner 23/04/2014 at 20:12

i have never planted dahlias before. I would appreciate any help I can get and it will be greatly appreciated. I just bought few tubers. Some are all attached to the main stoke and some are separated. If I separate few more and plant them in the tray on my kitchen windowsill will they grow?

Thank you.