Posted: 26/12/2014 at 10:28
I've only had dahlias for 2 years, I got them in a sale on the Sarah Raven website and I grow them in pots because we have clay soil and some parts are chalky too. I don't think mine would survive in the ground because we do get a fair bit of rain. I get about 4-5 flowers per plant (I have 7). I dead head regularly to encourage more flowers and so far I'm pleased with them. The tubers have really bulked up, one clump has split in two so I'm guessing that's how you get more plants. Hoping to add some darker ones (mine are all pink, spiky, sunflower like, bishop like).