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A few leaves (small & big) turn yellow from the ti...
hellomynameisstarted grow question 5 years ago
A few leaves (small & big) turn yellow from the tips while veins stay green. Also rusty and brown spots appear on affected leaves. Buds not fattening or at least very slow.
I used BioGrow/Calmag & flower fertilizer but always only 0.5 ml because I noticed a slight nute burn.
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The_Projexxanswered grow question 5 years ago
Your getting magnesium defficiency for sure as well as a little big of PK , the yellowing you can see is from the magnesium you see and the little brown spots that look like rust are from the PK , this is an easy fix all you have to do is adjust your nutrient solution to be more bloom oriented as well as add some CalMag to the mix . I would recommend you do a good PK boost in order to help your plant get back on track and to help it facilitate the fattening of buds . I would also recommend that you lower your PH abit to 6.6-6.8 this way you can ensure your plant wont get any locks outs in the medium . Although 6.9 isnt that much higher you would be surprised on what a 0.1 can do . Other then that you are well on your way to getting some nice medicine :) . I hope the information provided helps you on your quest to the finish line ! -Happy Growing!
Growdaddy420answered grow question 5 years ago
I agree with the posts above. It looks like a Magnesium deficiency. As you add magnesium keep an eye on the leaves higher up on the plant. It typically starts at the bottom and moves up. If they start to discolor gradually increase your dose. It may also be a good idea to flush your soil with P.H'd water to ensure there is no build up in the soil. Test the ppm or e.c of the runoff to make sure there isn't an unwanted nutrient build up. Good luck!
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S_V_F_Oanswered grow question 5 years ago
Maybe Magnesium Deficiency ? https://www.growweedeasy.com/magnesium-deficiency-cannabis
25% magnesium sulfate at any pharmacy can be bought at a dosage of 1ml L!
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Experimentgreenanswered grow question 5 years ago
Hey there so this interveinal coloring along with rust coloring and also the lower leaves being affected, it seems to be magnesium...however if you're feeding that then it may be that its available just not in a position to be taken in by the plant. Possibly due to the ph being 6.9. Mag is best absorbed from 6.0-7.0 so perhaps lower it a couple dots and it may clear up.
It can also happen when other nutrients aren't being taken in as well. So perhaps flush away any salt buildup with ph water and then do a normal feeding. Dolomite lime can also substitute for the epsom salt. Damaged leaves probably wont recover but watch for new growth being healthy within like 4-8 days.
Good luck.✌️
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Athosanswered grow question 5 years ago
That's magnesium deficiency. Increase cal mag to 1 ml / liter or better yet, get epsom salts.
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