Need a little help fellow farmers. I just transplanted my plants last week from veg under t5 to 1k hps. It has been about a week and I am starting to see some yellowing. :(
My specs.
Daytime:
temp: 79-80
rh- 70-73
ppm- 900
night time
temp: 72-75
rh- 75-80 (I am using my dehumidifier for drying right now. could this be a vpd issue?)
ppm: 400 ish
I have been water at an E.C. level around .8 for my smaller plants and 1.4 for the larger.
The yellowing is staring from the top of the plant. It leads me to think that it is a calcium deficiency. I have also noticed that the new grow is very rigid. I spoke to chris from Hydroponic Research( veg +bloom) " He thinks that this is not the case because I am using ocean forest." He is lead to believe that I am over watering. But I can't remember having these results in the past.
I just re calibrataed my ph meter.
I took about a half gallon of R.O. water and poured it over one of the 3 gallon pots. The run off tested at E.C. 1.6 and ph. 6.0
Ocean Forest? don't they use oyster shell for calcium? whichever..I agree, I would use Cal Mag especially with straight RO. The Coco also might be leaching whatever Calcium you have going. She's in danger though..maybe switch your foliar out to Cal.
Ocean Forest? don't they use oyster shell for calcium? whichever..I agree, I would use Cal Mag especially with straight RO. The Coco also might be leaching whatever Calcium you have going. She's in danger though..maybe switch your foliar out to Cal.