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Purpdaddy87 started grow question 4 years ago
I'm having brown spots that will eventually go completely through the leaf my last plant did same thing ive looked for spider mites and I dont think its potassium dificency but ive also red using to big a pot can cause parts to stay to wet that could cause this but how would i no
another purple kush
10 weeks
another purple kush Purpdaddy87
Critical Purple Autoflowering
5 comments · 4 years ago
Week 8
Leaves. Color - Mottling
PharmaZ answered grow question 4 years ago
As the others have said dude it is a PH issue. You need to find out what your PH aid so that you can adjust it accordingly. If you have an average ppm scale water supply you can get away with just nutrients as a Ph down. It’s also better to get a TDS meter. Of course in any case being able to feed the plant the most it can take without damaging is the best. But it is also not imposible to “grow within your means”
Get a PH meter and messge me so I can assist in your adjustment:v::skin-tone-2:
ShaggyGrower answered grow question 4 years ago
Have a look in the underside of the leaf. They sure to look like mite bites unfortunately. You'll need a microscope though unless you have exceptional eyesight.

If you have leaves with those one, I would remove them. Are they more prevalent on the lower leaves. I contaminated my plant with dodgy rain butt water. I spilt some on the leaves, and the water in the butt was contaminated with beasties - learned not to use water butt water from spring onwards (winter is ok as nothing lives in it when it's cold). HTH
Jeff123fish answered grow question 4 years ago
It looks more like a calcium deficiency based on you light being too close to the top of the plant. If you raise the light a few inches the problem will go away. You can see that there is a slight mag deficiency as well. But because your light is so close adding additional nutes would not be a good idea just raise the light a little to take the stress off of the plant
Removed answered grow question 4 years ago
Hi there! Stick and Athos have some great suggestions. I've had these types of issues before, and I believe it was related to being out of the proper pH range. If your pH is out of the range, then some nutrients can't get uptaken by the plant -- so even if you have them present in your nutrient solution, the plant might not be getting them and is therefore still having a deficiency. I would definitely make sure you are keeping your pH in spec. I grow in hydro, and pH is supposed to be between 5.5-6.3 generally. I know soil is a higher pH, so don't follow my numbers. Someone can point out the recommended pH for soil (or check -- get yourself balanced and you should see some improvement. I will say, however, that those leaves will not heal -- only new growth will be the indicator as to whether your issue is resolved or not.
Removed answered grow question 4 years ago
Well you are not posting your watering amount so I can't comment on that. BUT I can say for certain that 40 ml/lt is an insane amount of feeding, have you checked the pH and EC/PPM? I would flush the soil and get a pH pen and PPM meter asap
Stick answered grow question 4 years ago
Hi there! Well this can't be overwatering since you don't have any other symptoms, I'm thinking about 'leaf septoria', a disease caused by a fungus in your soil. Are these yellow rounded spots slowly turning to brown? If so, you got a fungus :( Keep us up-to-date and happy growing bro
Fun_Growin answered grow question 4 years ago
Take some pictures with your LEDs off and another "normal" light or flash on...
I can not see the spots or area you speak of under your LEDs