when to switch to 20/4?
- Thread starter rkymtnman
- Start date
WeedCliric
Member
why you need 20/4. No need. switch to 12/12
rkymtnman
Well-Known Member
yeah, that's my question. they are at the first 4 leaf phase right now (about 1 week old). should i let them grow a bit more under 24/0 or switch now?
Mr.me
Well-Known Member
Mine is still in the seed phase, I haven't even planted mine yet lol but a lot of people recommend 20/4. I personally would switch now, but that's just me. Some night time is good for the plants. But don't go to the 12/12, it will decrease yield. (from what I have read as well)
rkymtnman
Well-Known Member
i wasn't planning on 12/12. 24/0 and then 20/4.
i think i might wait until they get their first set of "real" leaves.
PURPLEB3RRYKUSH
Well-Known Member
24/0 the first 5 to 7 days after sprouting then drop too 20\4 or 18/6
rkymtnman
Well-Known Member
thanks! sounds good to me. will do.
I do 24-0 in the winter to maintain perfect temperature. 20-4 or 19-5 in the summer. 4-5 hours sleep at the hottest part of the day. Some of the best auto's I've grown have been under 24-0. I reckon 24-0 is good for 80%-90% of auto's. I find one or two look a bit tired and need a dark period to get the best out of them.
Joegrowsalot2
Member
I was wondering if you did 2x days @24/0 then every third day gave them 4 hours off
I tried that for 4 days and I didn't see any benefit. Switched back to 20/4 and they grew an inch in three days. Give it a go yourself and report back!I'm going to try 5 on 1 off in a small tent next round. that's 4 one hour dark periods every 24 hours
Poontanger
Well-Known Member
I was running 18-6, up to the 14 day mark, then heard of the 6-2 idea to stabilise temps, so i went 7-1, & yep all is good
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