Best light schedule for seedling thru veg?

ChroniCDooM · Feb 28, 2011

So its been three days since they popped thru and I was wondering what peoples opinions are on the light schedule for the seedling and vegetative stages are? I was planning on 24 hrs during the seedling stage then switch to 18/6 during vegetative. What about 24/0 till flowering? Anyone doing this? Should I have the light on 18/6 from seedling to flower? Just wondering what's the best way. I only have two autoflower grows of experience and I had my light on a 20/4 schedule for those. Thanks for any info and opinions on this!

Mother's Finest · Feb 28, 2011

Roots grow fastest at night and more light provides more energy. You give vegging plants a dark period when you want more root growth and no dark period to keep pot size down & supply vegetative growth with more energy.

ChroniCDooM · Feb 28, 2011

Mother's Finest said:
Roots grow fastest at night and more light provides more energy. You give vegging plants a dark period when you want more root growth and no dark period to keep pot size down & supply vegetative growth with more energy.

Just wondering if I should be on 24/0 during seedling stage or already on 18/6?

Hillcrest · Feb 28, 2011

ChroniCDooM said:
So its been three days since they popped thru and I was wondering what peoples opinions are on the light schedule for the seedling and vegetative stages are? I was planning on 24 hrs during the seedling stage then switch to 18/6 during vegetative. What about 24/0 till flowering? Anyone doing this? Should I have the light on 18/6 from seedling to flower? Just wondering what's the best way. I only have two autoflower grows of experience and I had my light on a 20/4 schedule for those. Thanks for any info and opinions on this!

Seedlings clones..... 16-18 light.
Veg.... 18 light.
You will hear some growers saying that they run 24/0 for veg. The only thing this does is increase your electric bill. There is NO evidence to show that a plants grows anymore given 24 hrs over 18hrs....AT ALL, ANYWHERE.
There is also debate as to whether using 24/0 actually light stresses the plant. ( I'm inclinde to
agree)

thexception · Feb 28, 2011

I run my seedlings 24-0 first week, then 16-18 through veg. I do this because females r suppose to be more prevelant with light hrs of 16 rather then 18 but I don't want to give up that much light time and I think a little variation is okay at this stage & more natural. After the first week, I believe a lights out period is necessary for rest & growth & studies have shown that a 24-0 schedule does little to change the overall production or maximum yield any one strain is genetically going to produce with 18 hrs of light.

Nocturn3 · Mar 1, 2011

There's no major problems running your lights on a 24/0 schedule, and 18/6 is fine too. However, the only serious experiment that I know of showed that 20/4 was the best overall veg schedule, in terms of final yield.

EDIT: here is the result

We did a lot of experiments with light times a few years back using known sat and sat dom clone lines.

With Vegging ie under hid lights.

20/4 produced the most sturdy growth and the most bulk. Best final yield, taken as 100%.
22/2 Less of both. yield 88%
18/6 Studier than 22/2 but slightly less bulk. yield 87%
24/0 Much lighter in all aspects than 18/6. Yield 79%
16/8 The weediest plants. yield 67%

ChroniCDooM · Mar 1, 2011

Thanks for your input! I appreciate it!

Best light schedule for seedling thru veg?

ChroniCDooM

Active Member

Mother's Finest

Well-Known Member

ChroniCDooM

Active Member

Hillcrest

Active Member

thexception

Well-Known Member

Nocturn3

Well-Known Member

ChroniCDooM

Active Member

Similar threads