I have ordered ladybug and mantid eggs for the first time this year. Yes, I know the mantids will probably eat the ladybugs and each other, but I will be happy to have whatever Darwinian survivors remain. They are more for ornamentation than pest control.

Anyhow, I'm trying to figure out the best way to hatch them out. I think I'd prefer to hatch-and-release. I know I can delay hatching by keeping the eggs in the frig, so I'm trying to learn when they can be safely released here in Massachusetts. From what I've read in the forums, it seems the mantids show up around the 2nd or 3rd week of June; does that sound about right? Is it about the same for ladybugs?