Today I Learned (TIL)

6469 readers

274 users here now

You learn something new every day; what did you learn today?

/c/til is a community for any true knowledge that you would like to share, regardless of topic or of source.

Share your knowledge and experience!

Rules

Information must be true
Follow site rules
No, you don't have to have literally learned the fact today
Posts must be about something you learned

founded 2 years ago

MODERATORS

[email protected]

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

submitted 6 months ago* (last edited 6 months ago) by Potatos_are_not_friends to c/[email protected]

20 comments fedilink hide all child comments

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

you are viewing a single comment's thread
view the rest of the comments

[–] x4740N 5 points 6 months ago (1 children)

Pretty sure plants need a rest period as well

[–] Aecosthedark 4 points 6 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 6 months ago* (last edited 6 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 6 months ago (1 children)

Is that alot?

[–] [email protected] 3 points 6 months ago* (last edited 6 months ago)

7g, so not really