What you see in living systems, and in genetic systems, is that the genes are already there, having arisen in the course of time, and when they are needed they become activated. If they had to be invented, the time would be too late.
. . . To be honest, I'd be the last person who should be doling out gardeinng advice. I don't have the patience for growing things. Yes, I realize there's nothing quite as satisfying as eating food that you've pulled up from the ground and that's why, at the height of the planting season, I bury cans of tomato soup in my backyard and dig them up in late spring.