Tip: Plant leeks and spring onions after using the dark green parts. They don’t require much soil, mostly look after themselves and you can get at least a second or third batch of dark greens from them.
I have found that the leeks work best when cut in a tiered fashion before planting – so just cutting off the dark green part of each leaf – rather than a bunt cut of all the green section. Spring onions are quite hardy but like to be planted in bunches so they can hold each other up.