Q.Starting Columbine perennials from seed with a grow light, do I leave the light on 24/7?
When starting Columbine perennials from seed indoors with a grow light, do I leave the light on 24/7 or turn off at night or periodically?
GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on January 9, 2020
Generally, 12 hours per day is plenty. You can use a timer or turn them off manually every day.
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/do-seedling-plants-need-dark.htm
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