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TIL that lettuce can grow with artificial sunlight (specifically red/blue LED lights) (nowiknow.com)

submitted 7 months ago* (last edited 7 months ago) by Potatos_are_not_friends to c/[email protected]

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As Cary Mitchell, a horticulturist at Purdue University told NPR, in the 1990s, “research showed that you could grow lettuce in just red light. If you add a little bit of blue, it grows better.”

If you’re interested in why, a redditor named SuperAngryGuy wrote up a detailed, well-sourced analysis about three years ago, here

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[–] x4740N 5 points 7 months ago (1 children)

Pretty sure plants need a rest period as well

[–] Aecosthedark 4 points 7 months ago (1 children)

I dont know about need, but a lot of weed farmers feel that plants do better with a rest/dark period. I haven't noticed a difference but give them a rest period anyway as its "natural"

[–] [email protected] 3 points 7 months ago* (last edited 7 months ago) (1 children)

I tried growing a plant in a closet once. The instructions I was given were to leave the light on 24/7 until it was as big as I wanted, then to switch to a 12 on/ 12 off cycle to get it to bud.

I didn’t try very hard on it and ended up with a quarter of mid weed after like 6 months

[–] [email protected] 2 points 7 months ago (1 children)

Is that alot?

[–] [email protected] 3 points 7 months ago* (last edited 7 months ago)

7g, so not really