My first praying mantis ootheca hatched in early May here in Minnesota.
It’s June 20th now and I have not seen these nymphs for several weeks. We had a terrible hail storm and some real cool temperatures. Luckily I have had several others hatch and the weather is perfect and the prey insects are everywhere.
Hatching otheccas outside is real simple. Just hang them from a bush and give it a light spray with a water every other day depending on your humidity in your area.
This was a large hatch and I’m really hoping to get some large adult praying mantises this year.