I jumped the gun with feeding, as some of the leaves starting clawing after, but no burnt tips, so I watered with just water & rhizotonic next and will go easy on the nitrogen next time.
I wanted to try some HST, but was pretty torn if to do it or not as the info online seems to be divided on the subject. In the end I tried FIM, but now I am not sure if it was the right move :D well see.
@Chilipadi, Yes I did for a few feedings (Biobizz calmag) but I now think that was not the main problem. It turns out it was caused by me not using all 3 parts of the feeding (only 2). It seems to have stopped getting worse since I went back to all 3.
@Chilipadi, Thanks for the tip, but I do not think so. Its the same light I used for last 2 grows, where the canopy was even closer than it is now, and this is the first time I saw these problems.
@minigroww, yeah been there too.. i grew soil too with lots of problems then went pure coco with only floranova and boom 100-140gram per plant everytime, only have to correct the ph to around 6.1 and yr golden
@Chilipadi, It seems to be. All of the buds on mine started to foxtail around day 50. If you look at the strain page here at growdiaries (growdiaries.com/seedbank/fastbuds/lsd-25) I think you can see foxtails on many of the pics.