I kept them in the included hatching kits for two and a half weeks on a shady porch.
Outside temps were in the 50's-60's at night and 70's-85 in the day. Nothing happened for two and a half weeks.
I figured the nymphs couldnt tell it was spring yet due to a lack of heat and light so I removed them from the hatching kits and put them on wooden food skewers and put them in the garden on a Sunday afternoon. ( 3 weeks after ordering/ two weeks and three days after they arrived.)
One was in full sun, the others again closely shaded by some of my plants.
When I came home for lunch on Monday one of the eggs in shade was hatching out. I was somewhat disappointed by how many I could see but I was still pleased that they were hatching. ( I saw about ten babies )
On Wednesday at lunch, the one in full sun was hatching out like crazy. I figure at least 100 came out of that ootheca.
I realized that full sun got the best results and I put them all in full sun including the 1st one that hatched in shade. Thursday at lunch the 3rd ootheca was hatching out. Again with at least a hundred babies if not more. As i am writing this it is Saturday morning and I am hoping the 4th one will hatch out today.
All in all i am very pleased with the results and the cost.
Some notes: the shipping cost more than the eggs themselves.
And the hatching kits appear to be white air sickness bags with a clear cellophane plastic window on one side and I will not use them again.
Ootheca come attached to the remnants of twigs that mama mantid laid them on. I GENTLY removed the twig and replaced them with the skewers... flat side of the egg down an then I just stuck the other end of the skewers in the soil.
Bottom line is I plan to buy four more in a month and hatch them in full sun on the other side of the yard.
Very Happy customer!!!
UPDATE: The fourth ootheca hatched out today ( the following Thursday. )