What are short-day and long-day plants?

CORVALLIS – It’s discouraging when your lettuce bolts or you can’t get your mum to bloom. There’s a reason for that, and it’s all about day length, which determines or how much light the plant gets. To understand plant flowering, you need to get a handle on “photoperiodism,” or amount of light and darkness a plant is exposed to. The amount of uninterrupted darkness is what determines the formation of flowers on most types of plants, according to Oregon State University Extension Service horticulture experts.

Distinguish between short day plants and long day plants.

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Photoperiodism in Plants: Short day, long day and day neutral plants

Even if it's warm enough, day length will stall winter veggie growth

Photoperiodism

What are short-day and long-day plants?

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Growing Something Great with Grow Lights - Maker, DIY - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key