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Lower leaves drying up upper growth yellowing

CheckThoseTrichs
CheckThoseTrichsstarted grow question 4 years ago
Lower leaves starting to dry and upper growth yellowing. DWC, pH 5.9 and 600ppm. M-G-B series nutes.
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Week 3
Leaves. Color - Yellow
Leaves. Color - Dark-brown
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GMSgrows
GMSgrowsanswered grow question 4 years ago
Ph perfect products are not the best for hydro grows. I reccomend you switch to either canna aqua or Dutch nutrient formula, DNF. Both were formulated specifically for hydroponics and they have everything your plant needs for a good vigorous grow. Right now your plants are showing a cal/mg defficiency from what I can see. Ph sweet spot is 5.8 in veg and 6.2 to 6.3 for flower. 600 ppm 1.2 ec is alright for now. For hydroponics you need a ph tds 24/7 monitor like the growboss. Or bluelabs. Your ph is probably drifting with the ph perfect crap. Cheers
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HeavyHittah
HeavyHittahanswered grow question 4 years ago
Iron defiency if I had to guess . Swap your calmag for some calmag+ that contains some iron.
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Organoman
Organomananswered grow question 4 years ago
I can tell you why your plant is unhappy - having a zip lock bag over her! Cannabis is not a rainforest plant. It does not need high humidity to thrive. Most native cannabis strain evolved in temperate, dry, low rainfall countries like Afghanistan and Pakistan. Even cannabis from South East Asia is usually found in low rainfall areas with a mild climate, with cultivation occurring during the "dry season". Those lower leaves have died and crumbled from being suffocated and from being kept in sweat lodge conditions. The yellowing upper leaves are probably in the first stages of being cooked while in the bag with the lights going. Please stop torturing your plant by suffocating it and cooking it, by placing her in a bag. Not sure I can give you any advice about DWC, but I think your Ph is too acidic. Please leave your plant uncovered and growth should return to normal and as long as your plant has decent genetics, all should be well. Hope this helps.... a grumpy old Organoman.
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