Last year many of my onion plants bolted before making bulbs. I had two kinds last year and one bolted badly. This year I have two kinds again, and BOTH are bolting. Last year one clump had a lot of too large plants and someone here (Dawn, I think) said that might be the problem. So this year I was careful to pick clumps that had small plants...and I have more of them bolting than ever. I like to eat a few for green onions, but not as many as I need to this year. Could it have been that hot dry spell we got?