Any idea what this could be?

Posted in the wrong section before, anyway.

I have 2 of these strain (Blackberry Moonrocks auto) only she is showing this. She is 30 days old.

Growing in mix of buffered coco, pearlite, worm castings and rice hulls with grow dots.

Watering when dry with dechloroninated tap ph’d to 6 to 6.5 and recharge once every 2 weeks

Mars Hydro light ts3000 2024 at 60% 30inches away with average ppfd at 700 right now.

She’s growing great, just recently started showing this. Is it potassium deficiency?

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I don’t believe you’re supposed to let Coco fully dry. I think you need to drop the pH to 5.8 in Coco but I’m a soil person so I’ll let a Coco expert give you better advice.

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I would lower PH to 5.8 or so and either add or increase cal mag.

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Nice plant but don’t let the coir dry completely. Coco coir, despite its water retention properties, does need to be watered every couple of days.

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what would adding cal mag do?

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thanks, I didn’t mean dry out completely. They get about a quarter gallon every other day, 3 gallon pots.

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I’m not real sure if applicable to your application, but my autos are 4 weeks old and getting almost a gallon every other day, and I’m already looking to increase.

I’m in straight coco. If you have perlite you may need more frequency… but you’ve kinda built a hybrid soil / media so not real sure.

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Those leaves are showi interveinal chlorosis.

I have 9 running and 2 of this strain but she’s the only one showing this. It’s gotten to be more pronounces yellowing on edges of the leaf.

They’re in a coco, perlite, worm castings and rice hull mix with grow dots and getting getting recharge 1x every 2 weeks.

What’s your temps and humidity level? Could be that, bugs or high feed ec? Just a few guesses. I’m sure others will chime in.

I just tranplanted 2 GG#4 from solo cups 70/30 coco perlite to 1 gallon fabric pots. One of them also has the curled up edges on leaves. I think mine is transplant shock. How often you watering them, what kind of light you got HID, LED and how close is it to canopy? What’s your nute strength ppm/EC and ph?

Tent averages 77F and 50% humidity under a Mars Hydro ts3000 the 2024 version at 60% intensity 30 inches away … average ppdf is 650 right now.

They get water when dry, ussually every 2 days with dechlorinated tap at a ph of 6 to 6.5

No bugs, not feeding anything extra, grow dots were mixed in from day 1

She is 29 days old and the only one show this. Doing great growing and took to LST very well so not sure.

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Some leaves get a little frumpy. Everything I’m looking at isn’t anything to be concerned with.

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The yellow edges became more pronounced. There are two or three leaves that are like that now so she’s definitely trying to tell me something. I’ll take another photo tonight when I get home.

Here is a photo, as you can see, it did get worse.

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Possible nitrogen deficiency… should be feeding at this point

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Make sure you keep coco wet, it doesn’t like to dry out. Yiu cant treat coco like soil, you have to treat it like hydro. Make sure you keep your feeding schedule dialed and water atleast once a day.

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They are growing with grow dots which has never required additional nitrogen or feeds other than recharge, maybe some cal mag later on and silica…

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Sorry for confusion
I did not mean I let them dry all the way. They get about quarter gallon every other day.

See above regarding feeding…

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Magnesium

Your running coco you want to water/feed daily with a PH around 5.8 as I understand things but I don’t run coco but many here do and that is their recommendations

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