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Spots on leaves
dank604started grow question 5 years ago
I'm still dealing with some spots that seem like cal-mag lock-out/deficiency but my PH is at 6.2-6.5. I think the light was too powerful I moved it up from about 16" to 18". I hope to have a lux meter soon to confirm any light stress issue.
Still look like PH fluctuation?
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CRiSPrGrowanswered grow question 5 years ago
probably some time two weeks ago there was a pH fluctuation which caused the symptoms to first appear, and it's resolved now but the inertia of the thing makes it so that it sort of gets worse before the symptoms stop spreading. Nonetheless you're at a heavy light schedule so your plant needs more magnesium that's what's causing the yellowing on the serrated edges of the plant's leaf. You should probably lower the light schedule as much as you're comfortable with , the consider spraying cal mag at 1 ml / L twice a week just before "sunrise" for the next two weeks. Absorption by the leafs is 80% compared to 20% at the root level. You can probably increase your calmag to 1ml/L in the feed as well. Hope this helps ! 🚀
MadeInGermanyanswered grow question 5 years ago
Hi Bro 🌱👍 um to exclude a lock that comes from overfeeding, I would do the following :-).
If you overfeed, I would proceed as follows. Best if you have osmosis water and mix the stale water for 24 hours (after 24 hours the chlorine has evaporated somewhat) to an Ec value of 0.2. Then add Cal / Mag until the Ec is 0.4. This is your source of water, so you can flush. At the next pour, start with a quarter of the feed dose.
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