I have several plants in my hydroponic ebb and flow system that have older leaves curling slightly upwards, and new growth rolling or spiraling together.
New growth spiraling/coiled up.
[img]https://i41.tinypic.com/10p615k.jpg[/img]
Leaves curling upwards, but no sign of yellowing or spots:
[img]https://i41.tinypic.com/2ykkvb4.jpg[/img]
Plant seems stocky:
[img]https://i41.tinypic.com/j8yvcw.jpg[/img]
I am obviously worried that this is a disease/virus. I'm growing heirloom tomatoes such as Cherokee purple, Green Zebra, Brandywine, Black Krim, although pictured is a Better Boy hybrid.
Could it be that my watering schedule of every 2 hours during the day is too much?
Details:
My E.C. is 2.0, my P.h. stays around a 6, my nutrient solution is kept refrigerated at a constant 67 degrees
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