Dahlias

[john1066]

Do I have to take my Dahlia tubers every year and re-plant them in the spring?

[hellywelly4]

You can leave them in over the winter, but after last winter's severe cold, it might be risky in case it's like that again this year.

[rowanwitch]

if you want to risk it and you live in the south then mulch well with straw and peg down some fleece over the top.... but I'd lift any that I really wanted to keep and take cuttings from the shoots in the spring so I had some back up plants

[hammerman]

last year, we cut our dahlias down in Preston Park, Brighton and gave em serious mulch with woodchip and rotted green waste.

Despite a december which never saw the day temp rise above freezing, they've come back a treat and now look superb.