I have 3 three plots at two different sites in south London UK. They have all sorts of rules about maintenance, which I skirt - just about. They know I'm a bit of a mad scientist, trying growing/eco experiments each year.
ECO-BEDS
Anyway - where I am the main challenge is slugs, which is an unfortunate combination with biodiversity. Healthy undergrowth = slugs by the kilo and zero surviving veggies nearby. So, next year I'll be setting up all my plots as Eco-Beds (my random name for them): the clear-earth veggie-growing area will be surrounded by planks (laid flat), which will be surrounded by the kind of habitat beloved of centipedes, beetles, leopard-slugs, toads, frogs, and planted up with wildflowers and edible perennials. Concentric rectangles. There will be several of these Eco-Beds per plot, creating a habitat network across the plot.
The idea is this: any slugs that want to live near my veggies so that they can visit overnight and munch will have to co-exist with all their predators. If they come as far as the planks, I will find them in the morning, chop them up and spread amongst my plants (a highly effective distraction for slugs). In the meantime, all the wildflowers will provide predators for the miscellaneous other pests.
This year I've been doing eco-beds Lite - mainly the planks and the chopped slugs on beds up against overgrown areas. So far, extremely effective, so I want to take it to the next level. I do talk permaculture with neighbours there, but few are interested. I'm hoping that a demonstration will be more effective, especially with all kinds of changes coming re fertiliser and bans on slug pellets!