i got some ak47 from serious seed going along with some og kush from reserva privada. All are in 3 gal pots with fox farm. grown from seed. all fox farm nutes plus open sesame, beastie bloomz, cha ching. I been following the fox farm nute schedule. Keep ph around 6.8. Im getting like red spots on the leaves and they then dry and die. they curl upwards. this is only happening on a few of the ak47s. The og kush look AMAZING, no probs with them. Is this too much nutes? not enough? maybe my ph meter is off? they are on day 35 of flowering. please check out the pics and help, thanks!
looks like calcium deficiency to me, make sure your ph is good. is the 6.8 ph tested at runoff or before you water?
I second the calcium def. also looks like under-watering.Growing AK47 myself and they use more cal/mag than other strains.Bontanicare makes Cal/Mag which i add at 1/2 strength and dont have any problems.