Posted: 31/12/2016 at 18:57
I wouldn't give them any extra fertiliser at this stage, Colin. Perhaps tickle in a bit of fish, blood and bone at the side of the rows when they are about golf ball sized, if you think they need a boost. Onions are greedy plants but I've always found there's enough nutrients in manure to see them through. Hope you have a great year in the garden in 2017!