Hello,

It sounds like you're dealing with a significant grub issue. Here are some safe and effective methods to control grubs while protecting pollinators and native gardens:

Beneficial Nematodes: These microscopic worms are natural predators of grubs. They search for and infect grubs, killing them within a few days. You can apply them using a sprayer attached to a hose.

Milky Spore: This naturally occurring bacterium targets Japanese beetle grubs. It can take several years to see the full effect, but it's a long-term solution.

Neem Oil: You've already used this, and it's a good choice. Neem oil disrupts the life cycle of grubs and other pests without harming beneficial insects.

Organic Fertilizers: Organic fertilizers can help maintain a healthy lawn without harming beneficial soil organisms.

Birds: Encouraging birds to forage in your garden can help control grub populations. Birds naturally feed on grubs and other pests.

Soapy Water: A mixture of liquid soap and water can be sprayed on the lawn to smother grubs.

For more detailed advice specific to Michigan, you can refer to Michigan State University's resources on grub control. This is the latest – so the years should be 2025 & 2026, 1) PREVENTIVE insecticides that will prevent grub damage next fall (2025) and following spring (2026) at these links:

How to choose and when to apply grub control products for your lawn - Turf

How to choose and when to apply grub control products for your lawn | MSUToday | Michigan State University

Using these methods, you can keep your garden healthy and safe for pollinators.

I hope this helps