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PostPosted: Jun 18th, '18, 13:10 
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My AP system is 3 months old now and PH drops from 7.2 to 6.2.

Nitrate is around 100 ppm.

The new leaves seems ok but the old leaves start yellowing and dying.

While my lettuce plants are growing vertically.

Please advise on this issue.


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PostPosted: Jun 19th, '18, 08:21 
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growing vertically sounds like they don't have enough light or that perhaps it's the wrong season and they are bolting.. What light does the system get?

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PostPosted: Jun 19th, '18, 15:28 
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+1 Sounds like bolting.


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PostPosted: Jun 20th, '18, 03:36 
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The plants gets sunlight starting from morning till two o'clock PM. Yes, it seems like producing seeds. Is it because of the lack of sun ?


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PostPosted: Jun 20th, '18, 07:12 
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It's usually because of temperature. Lettuce is more of a cool season crop.


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