These 2 plants have been a yellow green color - end of 4th week

[jeff1961]

These 2 plant been a yellow green color end of 4th week, still are in the end of 6 week, buds are growing good , have a lot green small leaves, by the look of the buds, improvement over the last grow I did, buds are more firmer, and thicker, the one on the right had a 2 week start over the other plant, both are same seeds of northern light, one had better stretch in flowering . Could not figure out why, using coca coir, fox farm grow big,flora bloom at haft strength, has good drainage,using CFL grow lights,

 

[Flipion]

I cant be much help to you there, never used CFL, always used MH and HPS till the recent change to LED