Yellowing leaves with brown spots

Sean1989 said:

Hi was wondering if anyone can help i have yellowing leaves with brown rust spots first grow so not really sure what it is,have been in flower 3 days yellowing was there before i switched, under 400w hps about 18" from top,fed nutes at 4ml/l and calmag at 1ml/l watered whenever pot feels light,ph 6.5 temp stays about 28 lights on 20 lights off humidty is around 50%,only happening to 1 plant other one is a darker green any help would be appreciated thanks

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chris42393 said:

Could be a little nitrogen deficiency, once your plant starts flowering and stretching, they use a lot more nitrogen (just in the initial phase of flowering). This is why you keep feeding them veg nutes a week or 2 into flowering. Same thing happened to me, i gave her a little extra of the veg nutes and it corrected the problem.

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Sean1989 said:

Thanks for reply,i was leaning towards nitrogen defiencey too,so they use more nitrogen at the change over? I will keep feeding veg nutes for another week and see how they are,would you take the effected leaves off or leave them on?

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chris42393 said:

Yes, that is correct, they use more nitrogen at the change over. And no, i would keep the leaves on.

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chris42393 said:

Could be a little nitrogen deficiency, once your plant starts flowering and stretching, they use a lot more nitrogen (just in the initial phase of flowering). This is why you keep feeding them veg nutes a week or 2 into flowering. Same thing happened to me, i gave her a little extra of the veg nutes and it corrected the problem.

Click to expand...

Sean1989 said:

Got another problem thought you guys might be able to help with the top of the smaller plant has bent itself over at the top at basically a 90° angle,am i right in thinking it could just be leaning towards the light as its further away than the bigger one?

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