Hello!
Even with a bit of lawn and plants, you are well occupied. My wife also comes up with the "greatest" ideas. Why? Well, she is currently at home like you (parental leave) and has her own little fantasies :-) Currently ornamental garden with all the pipapo.
She plans, buys flowers, and I do all the donkey work. Somehow I like doing it, but on the other hand, not really. Because it stresses me a bit when I know there is still something left to do, the a lot of work is exhausting, and I also want to do NOTHING in the evening once in a while. Or go jogging again.
My neighbors have a 3-4 square meter area. Wife at home, 5 kids, husband brings home the bread. They don't have any fruit or vegetables, but many plants, trees, and lawn. They are CONSTANTLY outside with all the kids doing something.
In short: Sorry, I feel sorry for your husband, he will have to realize your dreams and bear the stress. Especially if you go back to work again. Don't be mad, but do it for your husband's sake. If he already has concerns now, it won't get any better.