Light Photoperiods for Growing Squash Indoors

If you want to grow squash indoors with grow lighting, you're in luck! Squash will flower under a variety of photoperiods, and you can grow them successfully with anywhere from 12 to 18 hours of light; 12 to 14 hours are adequate with high-intensity lighting.

You will have to hand-pollinate indoor squash flowers. Squash and other cucurbits produce male and female flowers on the same plant. Male flowers typically emerge first, followed by female flowers, which have a swollen ovary (looks like a mini fruit) behind the flower.

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