Gardening by the 'threes'
If you want a wagon full of produce in the fall, you need to plant now. Your over-taxed yard is going to grow weeds or it can grow a garden. It is up to you.
It will take 15 minutes a day on average to grow $1,000 worth of crops in your yard with free water, free fertilizer and without tilling.
So just consider the "threes" of gardening:
Three cents buys a tomato seed, three dollars buys a tomato plant, or $3 for a pound of tomatoes, it is up to you.
If you want to really try something off the wall start growing on the roofs of your building and of course there are lots of road ditches and river banks that would love to have some herbs growing there rather than weeds.