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11-02-2008, 03:56 PM #1OPMember
Raising soil pH
Here's the info, there's more pics in my grow log in my sig.
Plant age 56 days since germination. 19th day of 12/12
Indoor
Soil
50% Jungle Growth soil mixed with 25% vermiculite and 25% perlite
Miracle Growth veg nutes with tomato on box (no longer using)
Green Light bloom nutes 12-55-6 (have only used once at 1/2 strength)
Hydrated lime (used sparingly)
Permitherin and Bifenthrin insecticides (for fungus gnats, no longer using)
City water source pH about 7
Lights 13 Cfl's and two 48" t8 tubes (450 actual watts/1650 equivalent watts)
About 42000 lumens for 8 sq ft grow area
79-80F day temp/65F night temp
45% relative humidity average. 65% max. 30% low.
Closet has high CFM exhaust into attic with passive intake at floor level.
Here's my problem. Leaves are pointing down at their tips, new growth appears wrinkled, and the lower leaves are becoming a pale yellow. Some have just died and fell off. The plants are not as vibrant as they once were. My soil runoff is about 6. Too low. I think there may be some N lockout going on, but this is my first grow. I know not of what I speak
My question: All I have at my disposal to increase the pH of the soil is Hydrated lime. I have used small amounts in the nute mix before to raise the ph of the mix, but I haven't tried to change the soil ph with it. The plants are not drinking much anymore, the soil is still damp from a watering 4 days ago. Should I correct the pH now or wait until the soil is dry? Should I correct it now and add H2O2 for oxygenation? How should I mix the lime? Should I wait?
Please look at my pics and grow log and help me figure this out. Thanks!dillhole Reviewed by dillhole on . Raising soil pH Here's the info, there's more pics in my grow log in my sig. Plant age 56 days since germination. 19th day of 12/12 Indoor Soil 50% Jungle Growth soil mixed with 25% vermiculite and 25% perlite Miracle Growth veg nutes with tomato on box (no longer using) Green Light bloom nutes 12-55-6 (have only used once at 1/2 strength) Hydrated lime (used sparingly) Permitherin and Bifenthrin insecticides (for fungus gnats, no longer using) Rating: 5
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