97% of wildflower meadows in the UK have vanished since the '30s. It's a major bummer, but there's hope. No Mow May is all about letting your grass run wild in May, which is like a buffet for our early pollinator buddies.
Plantlife keeps it simple, man. They ain't asking you to break a sweat. Just stash away that lawnmower on May 1st and watch those wildflowers bloom. It's like an all-you-can-eat nectar buffet for our buzzing friends.
Oh, and if you're still hunting for info on wildflowers, check out this guide I found on mklibrary.com.

The only slight problem with that, is that you have one heck of a big hot sweaty dirty job on in June.

I would love to do this with my little acre, but my HOA would jump down my proverbial throat! However, there are thousands of perennials and lots of fruit-bearing trees and shrubs in residence, so I do get a lot of wildlife, including many different birds, butterflies, bumblebees and others.