SPRING ONION EIFFEL ~ this British bred variety is one of the best with distinctive upright leaves and smooth white stems 100 seeds SOW: From March onwards in the open, no more than 1cm deep and sparingly to minimise thinning. By sowing every 3-4 weeks you can have a succession of salad onions. GROW: you will only need to grow with protection or undercover for October sowings which can give you the earliest spring onions in the following year. EAT: pull as needed. We often freeze spring onions after we cut them into strips to add to oriental dishes.