There are two main types of diatomaceous earth— pool-grade and food-grade. Both are considered pesticides. Pool-grade diatomaceous earth is treated in ways that make it more hazardous to touch or breathe for humans and other large animals. That’s why food-grade diatomaceous earth is usually recommended for pest control solutions.

The correct option of diatomaceous earth for yards is the food-grade form. Food-grade DE is safe for humans, wildlife, and pets. It’s the correct option to use as a pesticide on your lawn, garden, greenhouse, crop field, etc.

Diatomaceous earth (DE) is a naturally occurring, soft, siliceous sedimentary rock that’s easily crumbled into a fine white powder. It’s made from the fossilized remains of tiny aquatic organisms called diatoms. These microscopic shards are incredibly sharp on a tiny scale, which is what makes DE so effective against garden pests.