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Spots on leaves
NEWgrower2023started grow question 2 years ago
I am doing my first grow. Photo periods in Fox Farm ocean forest soil and I have leaves with browning spots. My water is 6.5 ph. I added some calmag when the spots first appeared but it hasn't helped. The plants are 6weeks old and I have not added fertilizer yet
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Leaves. Color - Mottling
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NEWgrower2023answered grow question 2 years ago
Thank you for the quick replies and advice.
I am not doing "organic" but I did use Mycorrhizal. I'll start fertilizing and do a calmag foliar spray.
I have a TDS pen (have never used it) so I'll do a healthy watering to get some runoff to test.
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Organomananswered grow question 2 years ago
Firstly, the spots will not go away, once the leaves are damaged, they stay damaged.
At this age/stage, you will need to use cal/mag every 10 days or so as a preventative, not as a cure after the fact.
After 6 weeks in the same soil, they will now need supplemental fertilizing, start with half strength cannabis specific products and see how that goes.
I would strongly advise against any sort of "tabs", they are very imprecise and require the soil to be overly moist to work properly and suggest liquid fertilizes as your best option, whereby you can controll the strength, exact amounts and frequency of application.
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GrowingGrannieanswered grow question 2 years ago
No diary = no information. Start a diary here... please! You're looking at several deficiencies, calcium being one, phosphorus being another ... these ladies need to start being fed a decent NPK nute especially since the soil has probably run out of all nutrients it first came with...
Good luck....
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Mr_Incognitoanswered grow question 2 years ago
Adding mycorrhizal supplements is also great for organic 😉
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Mr_Incognitoanswered grow question 2 years ago
Hi! It can be pH issue leading to Ca lockout, but I doubt so. This is rich organic soil, and normally you don’t need to pay too much attention to pH in such stuff.
Most likely it’s time to feed. These brown
patches are signs of Ca deficiency. Can be mix of some other elements deficiency also. You need foliar spray with CalMag first. Don’t make it too strong. Adjust pH to 6.0. Damaged leaves will not recover, pay attention to newer growth.
Although Ocean Forest soil is rich with guano and worm castings your plant probably ate too much already.
Water it, and check runoff ppm. You absolutely need TDS or EC meter to discover how much nutrients left. If ppm is low (less than 600) you should start feeding. Use slow release tabs if you go organic. There is plenty of such stuff available on market.
Good luck!
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