i cant seem to find yellow sulphate to sprinkle on my dahlia tubers do i really need to do it or will they rot if i dont . an old gardener told me he never puts anything on his but i am undecided help neaded
Look for Flowers of Sulphur - it's certainly available online from Amazon.
Never used it myself and didn't lose many to rot, and in this garden I've only got one dahlia at the moment.
many thanks for that i think i will take a chance this year i have just started growing dahlias again after many years as my other gardens where to small for them really i have noticed there are a lot of gardeners started to grow them again where i live they are a brilliant plant
No need. You may lose a few at most, but go to the GCs and chose some exciting replacements.