Scooby_Snacks
New Member
I've been having the same issues with my plants for the last few grows. I'm having a Phosphorus deficiency issue. Depending on the strain depends on how bad it becomes. I'm using foxfarm nutes per the listed feeding schedule. The problem starts happening around week 3-4 of veg. I start getting brown at the tip and edges of the lower fan leaves. The plant is dark green but the spots between veins start getting light green. The leaves start curling down. They eventually fall off. The pictures shown are what's supposed to be a mother plant of some Humbolt CH9. I just pulled a few clones off. Plants are given one water feeding a week and one nute feeding with all foxfarm nutes. I wait until the soil is pretty dry before feeding again. All feedings are ph'd to about 6.7. They get fed about 1 gallon and are in 5 gal buckets. I'll feed until I get drainage. Temps are good in the room usually topping out at 85 deg. mostly in the low 80's. Ph is 7, although after reading the plant and pest problem solver again it says not to use a soil meter. Can anyone tell me how to test my soil ph with a test strip or a test tube ph tester as they said to do? I'm at a loss as to what the issue is. I ONLY have this issue with plants I veg more than 3 weeks. I have clones that were put right into flower after rooting and seeds started 12/12 that are the healthiest plants I've grown with 0 issues so far and almost finished (knock on wood). I'm both looking for the cause of the issue and how to stop it from happening again. Any help or suggestions are appreciated.