[MissMoustache]

I grew American Flag leeks this year, so far only one has started to bolt. I also had a very hot dry summer. I seeded them in March and transplanted in mid June. They're about half the thickness of a store leek...if I'd fed them better they'd probably be bigger. So yeah, you could do midsummer planting, just may get smaller leeks.

Another one to try might be the leek assortment from Frank Morton of Wild Garden Seed. I've grown those before with great results.