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Yellowing, wilting, stunted growth

Stunatic
Stunaticstarted grow question 5 months ago
Can anyone please help me identify whats wrong with them. I've done a flush, adjusted the lights, reduced the nutrient strength, I've pretty much done everything and still stunted growth and they are still looking weak and frail. I'm lost and I don't even know what's wrong.
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Leaves. Curl down
Leaves. Color - Yellow
Leaves. Color - Pale
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001100010010011110
001100010010011110answered grow question 5 months ago
Guarantee it is too much light and they are stunted. I rarely diagnose with extreme confidence, because this is often more art than science with indiscreet causes for visible symptoms, but this one is incredibly obvious. I can tell be the growth pattern this plant was given way too much light too early and it is stunted. See how close the growth nodes are together? all the leaves are originating from a very small length of stem. some are worse than others, and looks like some differences in ages. You need to ramp up the light early on relative to how the plant is growing... you'll quickly be up to full power (35-40 DLI, i hope) within 1-2 weeks, but if you blast them too early they willg et stunted. The look of th eleaves is a tell-tale sign. Then, as it progresses the paling is another symptom as the leaf cannot keep up with the amount of photons absorbed. so, back off the light for a bit.. wait to see a change in growth patterns -- this may not be uniform. You may need something to elevate the plants or a 2nd light etc to avoid one plant snapping out of it much earlier then the rest, waiting for the others to do the same, then the one that was quick about it gets all lanky in the mean time. -- anything to help adjust the intensity of light per plant will help. a little shade for a few hours etc.. doesn't have to be a plant elevator. I'd get the growth back to normal before tweaking your fertilizer or anything else. Always good to ensure pH is in a proper range with hydroponics. If you ever experience pH drift, buy better fertilizers. Shouldn't happen.
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kashmir
kashmiranswered grow question 5 months ago
Plants have faded all over and this is usually a sign of problems at the root zone most probably PH or what others said about DWC as I have no experience with it. Also as noriu said check the pebbles PH I had a batch of pebbles for the garden that had their PH at around 4.
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Scrubbyjimbob
Scrubbyjimbobanswered grow question 5 months ago
I suspect that you're not irrigating often enough. I've only used hydroton and net pots in a DWC setup, where the bottom of the pot is constantly misted from bubbles in the reservoir. The rootzone also needs to stay dark, light harms roots, so if you're not putting the net pots into anything you may want to cover the slits on the sides.
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GoldenWeedGrower
GoldenWeedGroweranswered grow question 5 months ago
Are you using a capillary system ? You've not a diary, pls open up it..
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AsNoriu
AsNoriuanswered grow question 5 months ago
test run off ph, those pebbles sometimes are buffered bad and can play with ph.run off ppm and ph will tell a lot. put new saucer under, collect on middle part of run off, not first what comes out. test it ppm , ec and ph and you will know more than any advice here could give.
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