Help my 8 week autos yellowing

Dan8915

New Member
Hey guys can anyone help.....my first grow. have had yellowing for about 8 days now on 2 of my autos. 2 are white widow. 2 are northern lights. 1 of each are the worst affected. Now my other white widow has started yellowing on a couple of leaves.
Weve flushed with ph'd water at 6.5 which is what theyre fed at, theyve continued to get worse. So as of tonight treating as a magnesium deficiency and given them all a dose.
Theyre growing in new horizon organic compost, fed bat guano, banana tea and seaweed. We water in between feeds at a ph of 6.5 during veg it was tap water at ph7. (Ph tester took a while to come) usually takes 3-4 days for them to need a water or feed. The ph of the run off is 7. They looked great until week 7 and then started to yellow. Theyre 8 week old and was thinking if the magnesium fails should i give some nitrogen this late along, i think theyve got a while to go yet if they survive. Can anyone help?
 

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Oh forgot to mention theyre grown in a greenhouse, plenty of fresh air pumping in and have a fan on them all day. Manageing to keep the temps at 20-30 degrees Celsius. The sunrises from one side to the other so the plant from top to bottom gets direct light
 
Top dress container with nute ammended soil and feed shes hungry!
Thank you
Top dress container with nute ammended soil and feed shes hungry!
Thankyou very much could you possibly give me some recommendations for feed as they just had a dose of bat guano two days ago and im struggling to find a shop thats open during lockdown and if i order of the net i bet it could take possibley a week to arrive and everyone seems to be out of stock looks like most people are doing the same hehe
 
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