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That depends on what species you have. I have raised Chinese mantids, and they usually hatch in the last week of May or first week of June. They molt into a new instar every couple of weeks, and they are mature by late August or early September. Between molts, they don't seem to grow very much, but after they shed their skin, they sometimes look as though they've grown 30% bigger overnight!

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14y ago

What else can I help you with?