Most strains have a "stretch" period at the onset of flowering. How much they stretch depends on strain (if all lighting were adequate and equal). The short answer is yes, they will stretch, however the stretching shouldn't last long.

Sad truth is, your just gonna have to watch them and learn the characteristics of the stain your growing. One thing that is most certain is your plants should be noticeably shorter and fatter with the HPS.
ProGroWannabe Reviewed by ProGroWannabe on . Buds not tight or dense? Hi everyone, I've been growing for 2 years indoors and am happy with the results for the most part. I am using a simple hydro setup with a 250W Hortilux blue lamp. Quality is good so I don't know why I am being picky. the problem is the buds are not that big and or tight or compressed, more like airy and light. One of my friends said it could be C02 defiency but i don't know. Any ideas? Thanks! Rating: 5