But I eat bagsful of kale all year round, so any kale is an excellent use of space in my garden.
If you like some vegetables more than others, then the best vegetables to grow are the ones you like to eat. I like most plants, but I vastly prefer eating kale rather than lettuce or chard. In my gardens, I pick a few leaves here and there, and then the lettuce bolts (goes to seed and gets bitter), so I've learned lettuce is a waste of space for me. Chard is pretty, but I don't often eat it. But I eat bagsful of kale all year round, so any kale is an excellent use of space in my garden. If I could grow only one vegetable, my choice would be kale because it's productive year-round and I never get tired of eating it. It's also one of the most nutrient-dense foods, and I can pick exactly the amount I need. (Or rather, instead of buying a small bunch at the store or farmers' market, I can pick a grocery bag of kale.)