Plants stretching during flowering - Is this normal?

[Help_Needed]

whats the fertillizer your using & your NPK values, did you switch to flowering ferts when you started the flowering cycle?

These are growing in a hydro set up and I'm using the Lucas Formula on them. For flowering it means I'm using a ration of 0-8-16 in ml/gallon of water of GH FloraGrow, FloraMicro, and FloraBloom, respectively.

additionally 3 weeks in and very little budding .....at 3 weeks most of my strains are almost half way completed.

you may just have a slow strain?

Unfortunately I don't know much about the strain. Like I said, it's a custom strain from a not very well known breeder. I *do* know that these ladies took almost 10 days of 12/12 lighting before they even showed preflower though, so maybe it is a slow strain.

Also, the difference in the amount of flowers between the pic I've posted from two days ago and what they look like last night is pretty significant. So it's picking up speed.