A lawn needs neither of these things, or if you choose just to have plants instead (which we did in our small garden) then that needs neither water nor pesticides. Occasionally I might pull by hand some straggly stuff, or use a small electric strimmer to tidy things up (e.g. the garden path when stuff starts growing between the paving).

Unlike artificial grass, and even though my garden is small, this spring I had two birds nesting, I see quite a lot of bees and butterflies, and I just let the ants get on with doing their business. Pesticides and herbicides are never used. If there’s a plant I don’t want growing somewhere I can pull it up manually. There’s no need for the area to be super manicured.