plz help new leafs going yellow look at PHOTOS
- Thread starter ant21
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Marlboro47
Well-Known Member
Iron (Fe) - Starts with interveinal chlorotic mottling of immature leaves and in severe cases the new leaves become completely lacking in chlorophyll but with little or no necrotic spots. The chlorotic mottling on immature leaves may start first near the bases of the leaflets so that in effect the middle of the leaf appears to have a yellow streak.
Zinc (Zn) - In some plants, the interveinal chloratic mottling first appears on the older leaves and in others, it appears on the immature leaves. It eventually affects the growing points of all plants. The interveinal chlorotic mottling may be the same as that for iron and manganese execpt for the development of exceptionally small leaves. When zinc deficiency onset is sudden, such as the zinc left out of the nutrient solution, the chlorosis can appear identical to that of iron and manganese without the little leaf.
Manganese (Mn) - Starts with interveinal chlorotic mottling of immature leaves and, in many plants, it is indistinguishable from that of iron. On fruiting plants, the blossom buds often do not fully develop and turn yellow or abort. As the deficiency becomes more severe, the new growth becomes completely yellow but, in contrast to iron necrotic spots, usually appear in the interveinal tissue.
Zinc (Zn) - In some plants, the interveinal chloratic mottling first appears on the older leaves and in others, it appears on the immature leaves. It eventually affects the growing points of all plants. The interveinal chlorotic mottling may be the same as that for iron and manganese execpt for the development of exceptionally small leaves. When zinc deficiency onset is sudden, such as the zinc left out of the nutrient solution, the chlorosis can appear identical to that of iron and manganese without the little leaf.
Manganese (Mn) - Starts with interveinal chlorotic mottling of immature leaves and, in many plants, it is indistinguishable from that of iron. On fruiting plants, the blossom buds often do not fully develop and turn yellow or abort. As the deficiency becomes more severe, the new growth becomes completely yellow but, in contrast to iron necrotic spots, usually appear in the interveinal tissue.
Possibly a sulfur deficiency, based on information here:
http://www.icmag.com/ic/showthread.php?t=11688
http://www.icmag.com/ic/showthread.php?t=11688
Marlboro47
Well-Known Member
Mn
I would do a PH check one more time, just to make sure.
Just do a foilar feed with PH checked micro nutes.
Check that you're not adding too much P, which can lock up Fe. Iron def can be caused by factors that interfere with iron absorption of roots: over irrigation, excessive soluble salts, inadequate drainage, pests, high substrate pH, or nematodes. This is easily corrected by adding an iron supplement with the next watering. To much Fe without adding enough P can cause a P-deficiency.
Quick fix: Use Chelated Zin, Chelated Iron, Mn gets locked out when the pH is too high, and when there's too much iron. Use chelated Mn.
Well all three of those usually get locked out because of a high PH.
I would do a PH check one more time, just to make sure.
Just do a foilar feed with PH checked micro nutes.
Check that you're not adding too much P, which can lock up Fe. Iron def can be caused by factors that interfere with iron absorption of roots: over irrigation, excessive soluble salts, inadequate drainage, pests, high substrate pH, or nematodes. This is easily corrected by adding an iron supplement with the next watering. To much Fe without adding enough P can cause a P-deficiency.
Quick fix: Use Chelated Zin, Chelated Iron, Mn gets locked out when the pH is too high, and when there's too much iron. Use chelated Mn.
1st time grow