Plant has spots and curled leaf tips

web420

Member
My plants have something wrong with them. I grew 5 plants from seed. They have a combination of foxfarm ocean forest and powerflower dirt. They are in 5 gallon pots. They are about 2 feet tall. I don't know exactly how old they are. Two plants show the damage shown in the 5 pictures below. Another plant shows white lines on leaves as shown in the bottom 2 images. PH for all plants are between 6 and 6.8. I have been watering them every few days when they get dried out a little. I have used 3d organic grow 16-0-0 twice (spaced out about 7 days with two regular wattering between) since some of their lower leaves turned yellow due to nitrogen deficiency. They have two 400 watt output ufo lights about a foot away. I don't think they have light burn because the leaves with damage are not the top leaves, but some from the top, middle, and bottom. Some of the leaf sets are undamaged, or only show a few brown spots while some look really brown, crunchy, and the leaf tips are turned up.












The two images below are from a separate plants. Does anyone know what the white things on the leafs could be? I don't see any bugs on the leaves at all and so far it's only on about 6 leaves on one plants. Some of the new leaves forming have the white stuff on them. I haven't really done much foliar feeding, so I don't think it's related to that...



 

DocBrown

Well-Known Member
Your PH fluctuation could of caused a calcium deficiency due to making your soil to acidic. A lack of calcium can lead to Iron and Magnesium deficiency's also. I have a similar issue as you at the moment and I've been advised to keep a steady PH of 6.8 to better absorb nutrients.
 

pureweed4

Member
dame yo i got the same porblem dont no what to do i got 3 females around 4 to 5 mounths of age if u find whats the problem plz hit me up
 

dieselhound

Well-Known Member
The last two picks look like thrip damage to me. You mentioned spots. Are they black? If so, look into it being sooty mold. Just a couple things to look into. Good luck.

DH
 

420.247

Member
The last two picks look like thrip damage to me. You mentioned spots. Are they black? If so, look into it being sooty mold. Just a couple things to look into. Good luck.

DH


you problem could be due to excess nutrients if the leaves are curling and theres dark spots often the leaves hav been burnt by the lights and even the nutrient spray touching and burning their leaves... to fix this just water down the nutrients a bit more and dont over water so the roots are always saturates because the roots need oxygen too do not spray nutrients on the plant leaves, also rain water has more appropriate ph level that tap water
 

journey smok3r

New Member
your leaves will start curling down like they are from over watering
thats what happened to my first plant and i would put a fan on them and if your lights are close back them up a bit
 
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