I have two mantis egg sacs from Arbico Organics out of Tucson, AZ. After a couple weeks, they hatch and crawl all over looking for a good meal, which is your garden pests!
On the first day after release I use the hose to water nearby and watch them drink the droplets of water.
Every day I go outside to play where’s waldo with my mantis kids. By the third day, I can hardly find any except a handful of crispy babies that didn’t make it.
There are about four mantis children in my herb garden. Usually I find them on the rosemary and squash; today I found them in the chard and lemon balm.