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long-day
[ lawng-dey, long- ]
adjective
Botany.
- requiring a long photoperiod in order to flower.
long-day
adjective
- (of certain plants) able to mature and flower only if exposed to long periods of daylight (more than 12 hours), each followed by a shorter period of darkness Compare short-day
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yvlog History and Origins
Origin of long-day1
First recorded in 1915–20
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Example Sentences
Examples have not been reviewed.
In the South, where onions are typically sown in the fall and transplanted to harvest in late spring, short-day varieties are the choice; in the Northeast, where bulb formation happens in the summer from spring transplants, long-day varieties are indicated.
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To a good approximation, Saturday ended the annual long-day season.
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Long-day onions bulb when day length reaches 14 hours or more.
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If you’re gardening north of 40 degrees North latitude, be sure to choose long-day onions.
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Long-day cultivars — American summer berries — are, he said, “optimized for mass production,” at the expense of flavor.
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