I just started growing using ebb and grow system, with clay pebbles as grow medium (recommended by the sales person). I plant some Baba Kush and King Kush recommended by the clone store sales person. I started with 5.8-6.0 ph, and 700 ppm nutrient. Leaves kept turning partially yellow, mostly in the middle of the leaves, and some of them stay the same, but some get worse and die off. Someone suggested I try to increase water frequency as clay pebbles don't hold water as long as other mediums, and raise ph to 6.0-6.2, and raise nutrient to 800-1000. Which I did and no significant improvement observed. I use the commonly recommended NPK ratio for veggie, with all micro and trace minerals included.

Attached are 2 pictures showing a partial yellow leaf plant, and one with some leaves close to dying. Any suggestions on how to fix this problem please help! Thanks very much.

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kevinj Reviewed by kevinj on . Leaves keep turning yellow-please help! I just started growing using ebb and grow system, with clay pebbles as grow medium (recommended by the sales person). I plant some Baba Kush and King Kush recommended by the clone store sales person. I started with 5.8-6.0 ph, and 700 ppm nutrient. Leaves kept turning partially yellow, mostly in the middle of the leaves, and some of them stay the same, but some get worse and die off. Someone suggested I try to increase water frequency as clay pebbles don't hold water as long as other mediums, Rating: 5