I really wanted to grow all my own seed crops this year as I start making landraces. However, I've gotten behind on planting some things. Nobody online talks about how long it takes to produce seeds, just how to get a vegetable to edible maturity.
The crops I'm wondering about are lettuce, spinach, radish, and asian greens. I wanted to select them for heat tolerance by starting them in hot weather and saving the last ten percent to bolt. However, will I have enough time to mature seed by frost? I can get an early frost by September 10th, and average is October 10th. I might be able to cover things a bit.
On the other hand, I'm going to plant the same things in early September, leave the little plants out all winter, and save seed from whatever survives till spring. That way I will have a cold hardy and a heat tolerant landrace.