Brown spots on leaf edges

Hey guys, first time growing outdoors so I wanted to try a minimal approach to nutes and fussing with this one. Everything has been going pretty well considering the crazy weather we have in this part of the midwest (days over 90º scattered throughout the summer, thunderstorms, hail, etc.). The other day I noticed a few leaves with brown spots only along the very edges of some leaves. Anyone seen this?

It's an auto in 7 gallons of Ocean Forest, about 4 weeks into flower. I didn't start any feeding until the first week of flower and very light amounts of Earth Juice Bloom which is a 0-3-2. I upped the amount to a regular dose (4ml/L) in the 3rd week of flower.

I appreciate any insight!

Early calcium deficiency

Thanks. That was one of my suspicions. I haven't checked the soil PH this entire grow but I guess it's time too. IF it turns out it's a little too acidic would you think just trying to correct it and get it back in range will help enough with calcium absorption or should I also give it a cal-mag treatment?

midwestweed said:

Thanks. That was one of my suspicions. I haven't checked the soil PH this entire grow but I guess it's time too. IF it turns out it's a little too acidic would you think just trying to correct it and get it back in range will help enough with calcium absorption or should I also give it a cal-mag treatment?

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I suggest a couple of doses of cal mag. Beginning of flower there’s a huge demand for both. It’s the only time I routinely add it to my feedings. You can foliar spray it on as well. A couple of drops - DROPS! - of liquid soap help it stay on the leaves.

hotrodharley said:

I suggest a couple of doses of cal mag. Beginning of flower there’s a huge demand for both. It’s the only time I routinely add it to my feedings. You can foliar spray it on as well. A couple of drops - DROPS! - of liquid soap help it stay on the leaves.

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Thanks for the tip! The buds are still fluffy enough so I’m not worried about excess moisture from spraying.

midwestweed said:

Thanks for the tip! The buds are still fluffy enough so I’m not worried about excess moisture from spraying.

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First 4-5 weeks you should be good to spray.

I agree with the calcium deficiency. Also Im not sure if you know but your plant looks like its fully seeded.