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Grow QuestionsHigh EC and PH

High EC and PH

newenglandgrowersstarted grow question 2 years ago

Light brown spots forming in the side of the leaves and red tips coming from the new growth on the tops, did about a half strength feeding today at .4EC ph 5.5 tested the runoff it came back at .7EC ph 6.3. Growing in coco coir currently day 34 using GH floraseries, and calmag+

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Week 5

Leaves. Tips - Burnt

Leaves. Other

m0useanswered grow question 2 years ago

OK so DE is not of concern. just some extra microscopic skeletons. Also sorry missed the fact it was an auto. Few little articles to read on adjusting EC. https://www.cannabisbusinesstimes.com/article/optimizing-electrcal-conductivity-ec/ https://www.dinafem.org/en/blog/how-adjust-ec-cannabis-growing/ As this is an auto they have different feeding guidelines vs photoperiods. Don't know how I missed this. https://www.autoflower.net/forums/threads/med-man-method-feeding-chart-ppm-ec.47856/ Weird why Crop King Seeds does not show that strain on there profile they are a regressed grower on this platform. So if you going in at .5 and coming out .7 may just need to water more with .5 till a larger amount of runoff comes out or just give them water next run to hit your target. always ph to your mediums content, soilless 5.8-5.9 in veg and 6.2-6.3 in flower. Best Of Luck!

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gottagrowsometimeanswered grow question 2 years ago

Oh EC for that is around 1.7 good luck.

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gottagrowsometimeanswered grow question 2 years ago

Your EC is way too high no mater the PH. the range in PPM you should be hitting with nutes If you are mixing solo should be 3-400ppm about 0.8EC if you are mixing a batch be sure to add micros and the PPM range should be 9-1400 at max and thats even high. Lower your EC to this or you'll have real trouble pal

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newenglandgrowersanswered grow question 2 years ago

The DE looks like that on the plant because that night at lights off I sprayed the leaves with plain water to try and wash the DE off but some stayed on and just kinda smeared like that

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newenglandgrowersanswered grow question 2 years ago

The white stuff is DE I accidently got on the leaves a couple weeks ago when I was sprinkling it on the medium. The feeding was .4 EC and run off was .7 EC. I was feeding so low to try and bring the EC down, earlier this week it was 1.0 and I saw some brown spots starting to form on some fan leaves so I thought I was overfeeding also the tips on the new growth had me concerned that it was nutrient burn.

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m0useanswered grow question 2 years ago

What is all the white stuff on the leaves in that video? Mineral deposits? are you spraying them something? If you are not spraying that maybe WPM. a fungal disease of the plant. Your in week 5 of growth a 0.4ec that is 200ppm on the 500scale, on the low side for a plant in week 5, normally they wold be getting aorund 1.2-1.7 Or do you mean 4.0ec? = 2000ppm and 7.0ec? = 3500ppm as that quite high. Let us know.

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newenglandgrowersanswered grow question 2 years ago

Temperature is at 75-76 with humidity around 55%, night time 72-73 humidity 50%. I feed once per day till run off. Using the bloomgrow 600W LED which is really 100W I believe from the wall, currently 18-20" above the canopy I can't get it any higher than that, also have two fans, one on the bottom and one on the top, so I know I have good airflow. I've been using about half nutes for 2-3 feedings now and did a flush as well with plain ph balanced water and the symptoms are still getting worse.

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