I don't use CFLs myself, but I don't remember reading that things take longer to finish under them.

There are numerous things that could make your plants go longer than you think they should. And, even in stable genetics, individual plants are just that, individuals.

So, maybe if you posted a picture and some information about the plant(s), someone could make a diagnosis?
crabbyback Reviewed by crabbyback on . Does flowering under CFLs take longer? I am 7 weeks into flowering using CFLs and this strain is supposed to take 6-8 weeks, however the ladies don't appear (to the naked eye) to be anywhere near being done. I am wondering, does it takes longer for the flower phase to complete under CFLs than it does under an HPS or the Sun? Does the estimated "6-8" week flowering account for any usable type of light? Or a specific light? Thanks. Rating: 5