long-day plant

American  

noun

plural

long-day plants

1. Botany. a plant that only flowers when it has been exposed to periods of darkness shorter than a certain critical length. Compare day-neutral plant, short-day plant. See also photoperiodism.

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long-day plant Scientific  

/ lông′dā′ /

1. A plant that flowers only after being exposed to light periods longer than a certain critical length, as in summer. Spinach, lettuce, and some varieties of wheat are long-day plants.

2. Compare day-neutral plant short-day plant See more at photoperiodism

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