Growing onions is not for the faint-hearted being an expensive crop to grow and like their broad-acre counterparts, there are fewer actives to control yield-sapping diseases and weeds. As a crop that responds to day length, early vigour is crucial to building canopy before bulbing, so soil type, fertility and irrigation are key to maximising yield, explains vegetable specialist Tom Will.  See also: Explore niche spring crops for healthy margins Planting starts in February with around 70% of the UK’s onions […]