found praying mantis egg sac
I've found several other praying mantis posts in this forum, and decided it would be a good place for my question:
I was cutting down my ornamental grasses today and found what I know is a praying mantis egg sac attached to a couple of grass stems. Having cut the grass, I was afraid the sac might blow away and get hurt, so I tucked in under some English ivy a few inches down in a place where no one will walk.
Is it safe there? I like having them in the garden and don't want to hurt the chances of having some hatch. By the way, when do they hatch, or is there a certain temperature range when they do?
Thank so much!