I live in South Lincolnshire and would like to plant out dahlia tubers and leave them in the ground as I don't have any luck in keeping them over winter in the greenhouse. This last winter I'd covered them in newspaper and put them in dry planters but to no avail all rotten.
Any advise would be very welcome
You are unlikely to have much success leaving them in the ground in lincolnshire unless you have very free draining soil. Better to lift and keep in a frost free place. that could be a cellar or an unheated bedroom in a box.
I live in South lincs too and also had no luck with keeping tubers so these past two years I've just left them in and they've come again each year. I also have back-ups by planting a few seeds. They germinate really easily and flower in the first year.
Thank you so much for your replies. I will see which ones I like the best as they are all new to me this year and try a bit of both methods and see how I get on.
I leave them in, but they are planted in a dry area of the garden, so far no failures they come back every year bigger and better. I'm in the West Midlands.