Tom: I didn't elaborate much so I could focus on the question, but since you ask
A few years ago, a swarm of bees came into one of our trees. But we had only grass, a monoculture. That is, one type of plant, mostly dead all summer when they were here. The bees left.
I got in touch with a local organization that specializes in native plants, which occur naturally in the area so the bugs and birds that live here can find food and shelter in them.
With the group's guidance, I've been digging up the unfruitful lawn grass and replacing it with wildflowers and tall native grasses.
This summer was the first bloom. I was really glad to see lots of bees and hoverflies.
The aim is to provide more food and shelter to these little creatures than existed before
I'd eventually like to put some kind of little stupa in the middle for them too, but I'm not sure how.
If you're interested, there might even be a local native plant group in your area!

With a heart wandering in ignorance down this path and that
to guide me, I simply say Namu-amida-butsu. -- Ippen
"If sentient beings are touched by His radiance, their three afflictions will be eliminated and their bodies and minds will become gentle. They will be filled with joy and exuberance as benevolence arises in their minds. If those who are in extreme suffering, taking any of the three evil life-journeys, see this radiance, they can rest, no more pain or distress." --
Sutra of Amitāyus Buddha
The Teachings of Master Hōnen