I took some cuttings from a few plants and had them spend one night with 18/6 then the last 9 days with 24/0.

When the cuttings went in the new space they were quite wilted. Within 24hours of continuous light they were very erect. Also in the room are 3 potted clones that are now entering day 25/26 of veg since acquired. All plants show good signs of life having been under 24/0 for some 9 days.

Yesterday I thought I had achieved my week long propagation period of 24/0, so I added a timer inline with the light and commenced 18/6. One of the cubes has started to show numerous thick roots emerging from the cube. All the cuttings are showing good signs of health, but not all are showing their roots.

I've never delved into taking cuttings from my own mothers until now, so this is much to do with experimentation that perfection of current methods. I think 9 days is quite long for rooting time...

I will take some more cuttings once these ones are rooted and see if 48/0 then 18/6 give the cuttings such an abundance of energy that I can get my cuttings rooted in less that the present time its taking.
home.grower Reviewed by home.grower on . Photoperiod: Veg @ 18/6, 20/4 or 24/0 I'm unsure if this kind of query has been raised before. If it has forgive me for repetition and I'll be happy to follow any links to existing threads. I'm vegging under 1 600W HPS for 18 on 6 off. Does any one know the science behind 18/6 as oppose to 20/4 or 24/0? Please Share!! I've read on other sites threads that offer differing opinions. Some people swear by 24/0 while I have never tried any other regime besides 18/6 unless it was by accident where timers didn't switch off the Rating: 5