PICS, noticed brown dot spots all over leaves after misting with neem oil

Last night was my second treatment with neem oil. I have not seen an y spider mites but am following directions to keep up with the neem oil for about 2 weeks. I noticed some leaves with brown dots all over after the first spraying, but I thought cal/mag def. Before my misting yesterday, I watered 5 plants with a gallon of RO water, 1 tsp veg nutes, 1 t ps cal/mag, and 2 tsp flowering nutes. There are lots more leaves now with lots more dots. I am 17 days into flowering, could I have used too many nutes? This doesnt look like nute burn, and I can not find any pics similar to mine anywhere to help diagnose. I am using 2 400w hps. The soil ph is apx 6.8. I also noticed a few leaves turning yellow with green veins. I hope these pics are good enough.

it looks like a secondary deficiency, cal/mg probably but you said you addressed that... maybe it just needs time to recover. you notice any bites? thrips leave lil poops but not like that... thats so wide spread on the leaf it looks likes a deficiency... but your PH is good and wouldent be causing lockout of the micros so im a little stumped. really looks like CAL/MG maybe your using hard water and have a salt buildup?

twenty2 said:

it looks like a secondary deficiency, cal/mg probably but you said you addressed that... maybe it just needs time to recover. you notice any bites? thrips leave lil poops but not like that... thats so wide spread on the leaf it looks likes a deficiency... but your PH is good and wouldent be causing lockout of the micros so im a little stumped. really looks like CAL/MG maybe your using hard water and have a salt buildup?

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I have been using RO water from the store. I refill the bottles. Maybe I am not adding enough nutes? I add just a small amount to not over do it. From what I am reading at other threads, the pics dont look like mine, but a little similar, they all say cal/mag def also. I guess I can try to up the dose a bit. What about a foliar feeding? THANK YOU

Also, if I fed them yesterday with the amounts I noted above, is it too soon to feed again tomorrow? I have 5 white widows. Maybe just water with cal/mag instead of the other nutes?

np man... i always air on the side of a lil ness nutes too giving them a hotshot will be a lot worse than them being a lil hungry. i dont mean to beat a deadhorse it just looks like textbook cal/mg to me. I have never used neem oil, and everyone on here seems to have no problems with it but maybe it could be spotting your leaves? maybe a pic from a little further back so we can see the plant will help get a better idea. what kind of ferts you have? got some stuff with a good micro/macro blend?

I fed 1.5 tsp Bio-bloom 1-2-2, 1 tsp cal/mag botanicare, 1 tsp flora nova 7-4-10 that also contains ca, mg, s, b, cl, co, cu, fe, mn, mo, and zn. I fed this monday, and if this looks like cal/mag def, would it be ok if I fed again today? Same amounts or up a little bit? Foliar spray? 2 out of the 5 plants show these characteristics and I do not want them to get worse. Thank you

Did you spray the plants with the lights on and the plants under the lights? If so, they could be burn spots. The little droplets of water act like a magnifying glass when the light hits them. Makes little "burn" spots. When spraying I move my plants out of the light, spray and then let them fan dry off for about 20 minutes until there are no moisture beads. Then back under the lights. Could be wrong, but I did it once with my leaves and they looked like that.

I was thinking that could be a possibility also, but when I sprayed the plants I took them to the other half of the room, which is blocked off by black plastic stuff, out from under the lights, then it was time for lights out. I was told to spray either right before lights out, or atleast a half hour before lights on. I also put a fan on after lights out to help them dry and try to keep mold away. They dried fairly quickly. I dont think it would have lasted all night, do you? I know the first time I sprayed them they dried within like 5 minutes and I didnt know if that was ok. But to you, this looks like what one of your plants looked like after being under lights and burned? I was probably about 4 feet away from the lights while spraying, could that have still been too close and been burned being that far away?
Thank you

hmmmm...I'm stumped then. Sounds like you sprayed right to me. BUT the one time I sprayed and put them back in too quickly, they DID look like that. I would also say cal/mag deficient, but that's been addressed too. Good luck.

The girls were thirsty so I watered and fed. I used 1 gallon for 3 plants with 2 tsp bio-bloom 1 tsp cal/mag 1 tsp flora nova. I watered the other 2 plants with 2/3 gallon water with 1 tsp bio-bloom 1/2 tsp cal/mag 3/4 tsp flora nova. I guess I will see how they do, unless someone comes and tells me I am doing wrong or have suggestions on what could be wrong. I realized 1 gallon was no longer enough water for all 5 plants. I wasnt getting any runoff. So, I fed again, and maybe I need to start feeding more often? How long do I add the ve nutes for the N for? I read only the first few weeks? is this right? Thanks

HELP! More leaves getting lots of brown spots. What is it?!?!?!?!?!

Someone told me that white widows are known to be finicky with nutes. That my girls do have mg deficiency but because of nute lockout because white widows like lower ph, about 6.1-6.2. Does this sound right? If this IS from nute lockout, how do I fix?

its from spraying before lights out and using a solution of neem oil thats a lil too strong.
pull back the amount of neem oil in the mix a lilttle bit next time and see if that helps.

I was gonna say calcium deficiency myself. It isn't light burn, a 400 watt bulb just doesn't have enough intensity to cause that to happen, water droplets on the surface of a plant do not magnify the light either, that would only happen if the droplet were somehow suspended above the plant surface. Besides the rapid evaporation of water itself would cool any heat being created by the light on the leaf surface anyway. And it would be everywhere you sprayed, not just on leaf margins and tips. Your problem is nutrient related, the leaves are turning yellow. What kind of water are you using ? Tap? check your local water treatments facilities web page/city page and you can usually download the makeup of your municipal water source, it will tell you whether or not it already has high calcium/magnesium levels and other things.

NoDrama said:

I was gonna say calcium deficiency myself. It isn't light burn, a 400 watt bulb just doesn't have enough intensity to cause that to happen, water droplets on the surface of a plant do not magnify the light either, that would only happen if the droplet were somehow suspended above the plant surface. Besides the rapid evaporation of water itself would cool any heat being created by the light on the leaf surface anyway. And it would be everywhere you sprayed, not just on leaf margins and tips. Your problem is nutrient related, the leaves are turning yellow. What kind of water are you using ? Tap? check your local water treatments facilities web page/city page and you can usually download the makeup of your municipal water source, it will tell you whether or not it already has high calcium/magnesium levels and other things.

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I use the RO water out of the machine at the store. I fed again yesterday, I have not seen any new since yesterday, but the ones with the brown spotts are getting dry and crispy. Could this be from lockout?

it COULD be from lockout, the only way to know is to get a QUALITY TDS Meter. Don't skimp on the Meters, it WILL bite your ass. The spots on the leaves will never go away, that part of the leaf is dead so what your attempting to do is play damage control here. If there are no bugs in your grow then you shouldn't be using NEEM oil.

I would probably think that a total of 4 Teaspoons of amendments/per gallon might possibly be too much. It would help to know more about your grow and the methods you are using to help you better. Soil/hydro, what kind of medium are you using (Clay balls/Fox Farms soil/ Organic miracle grow/regular miracle grow/did you mix perlite into your soil? How far away are the lights? those kinds of things.

If its soil you are growing in then its most likely related to overwatering and some over feeding. The roots are sitting in soggy soil and will not be able to take in enough oxygen, this can show up as yellowing of the leaves and black or dark brown spots or splotches that usually first appear on the Larger and oldest fan leaves. New growth will still look good. I try not to water plants in soil until the soil is almost completely dry or the plant just begins to wilt, then I thoroughly douse it. I only add nutrients to my water about once every 10 days or so and that water never exceeds 800PPM until I am over half way into flowering. The furthest PPM I personally go to is 1200, and then i taper it off in the last 2 weeks.

More pictures and pictures of the whole plant would help also.