fartoblue
Well-Known Member
Hello all, please find pics of leaf, I suspect it is Calcium deficiency which I just don't get. All advice greatly appreciated.
It isn't every leaf on every plant maybe 5%. with some worse than others. The plants are 4 weeks into 12/12 tomorrow.
Growing top feed Rockwool croutons in 20 litre pots which are full of roots and have a secondary root system growing into the water below, 5" gap between pot and solution. Roots are fantastically healthy.
Feeding GH 3 series (soft water), Grow, Micro, Bloom. 3-2-1 in veg, 1-1-1 transition, 1-2-3 after stretch. Cal Mag at half dose, Silic Acid at full dose until stretch has finished also beneficial's
0.9 ec veg, building up to 1.2-1,3 max in flower then decreasing near the end. At the moment these plants are on 1.2 ec. PH 5.7 - 6.0.
General Hydroponics suggest NOT feeding cal/mag with their soft water version but as I feed quite low thought half strength would suffice. My background tap water is soft 0.2 ec.
Plants had a hard defoliation at 3 weeks and did not show any stress although bud formation seems to have slowed slightly but I always get a bit panicky around 4 weeks so may just be my imagination as otherwise the look healyhy, maybe a bit to deep of a green if anything but showing no signs of nute burn on tips.



It isn't every leaf on every plant maybe 5%. with some worse than others. The plants are 4 weeks into 12/12 tomorrow.
Growing top feed Rockwool croutons in 20 litre pots which are full of roots and have a secondary root system growing into the water below, 5" gap between pot and solution. Roots are fantastically healthy.
Feeding GH 3 series (soft water), Grow, Micro, Bloom. 3-2-1 in veg, 1-1-1 transition, 1-2-3 after stretch. Cal Mag at half dose, Silic Acid at full dose until stretch has finished also beneficial's
0.9 ec veg, building up to 1.2-1,3 max in flower then decreasing near the end. At the moment these plants are on 1.2 ec. PH 5.7 - 6.0.
General Hydroponics suggest NOT feeding cal/mag with their soft water version but as I feed quite low thought half strength would suffice. My background tap water is soft 0.2 ec.
Plants had a hard defoliation at 3 weeks and did not show any stress although bud formation seems to have slowed slightly but I always get a bit panicky around 4 weeks so may just be my imagination as otherwise the look healyhy, maybe a bit to deep of a green if anything but showing no signs of nute burn on tips.


