Quote Originally Posted by greengiant1980
do you mean 3 weeks after germination or three weeks after planting?
When the seedling/sprout breaks the surface of the soil. I consider that the start of the clock. I veg for 4 weeks; only, (20/4) and then switch to 12/12 flowering light cycle/flowering nutes...:rasta:

I do my final transplant when the seedlings have shown their sex.