Had nearly 100% survival from seed to harvest. Liquid fertilized, composted, and mulched the whole way—they did great. They withstood bolting while others caved. However, they still attempted to go to seed before they grew large. In Zone 5, we were paying very close attention and harvested before it was too late. The head formation was 4-6", with the 30 plants yielding about 6lbs of broccoli. For the hobby gardener, don't plan on leaving town if you're growing an early crop! Looking forward to seeing what it will produce in side shoots--otherwise this variety was not worth our time.