I give up, what causes this leaf necrosis?

most likely is burn from spraying.... I used one time 1 part SM-90 5 parts water with 2 tablespoons of neem oil per gallon in veg and have been spider mite free for 3 months.

try watering with pH 6.5 its said to be better for soil

that would be Phosphorus deficiency. any chance you PH your water, if so you should stop. the plant looks slightly hungry

and for the mites, get cayenne pepper and garlic, blend them, and spray

Originally Posted by dirtysnowball

that would be Phosphorus deficiency. any chance you PH your water, if so you should stop. the plant looks slightly hungry

maybe if he has purple stems

Originally Posted by Randm

I've searched all the marijuana trouble shooting guides I can find, but have not seen anything that looks like this. I am hoping that those with more experience than me can point me in the right direction.

FoxFarm Ocean Forest soil
400 watt MH lamp about 2 ft. above the plants.
watered with well water, ph 7.0
strain: Chronic
Nutriants: None yet


PA150013.jpgPA150014.jpg

This particular plant is my Chronic Mom that is aproximately 2 months of age.
I have seen this on several other of my plants at various stages of growth, from very young to flowering adults.
( Yes I know that they have evidence of spider mite infestation, I already treated with mighty wash about 3 days ago )
This has been a persistant problem that shows up in my grow room on a regular basis, it doesnt seem to get too bad, at least not much worse than what you see here in the pictures, but I am stumped as to the causes of it.

Any help would be apreciated, thanks in advance

Hey bro! It also looks like "Phosphurus" deficiency to me aswell! Although I may ne wrong. But from looking at this chart I'm going post 4 you, it seems like it is. Idk if you've seen this chart or not. But I use it to judge my deficiencys if I ever have any. Don't give up bro just because your having some issues! I know it sucks! And you get tired of dealing with shit of this nature! But look at it like this. We've ALL have had our share of problems such as this, your not in the boat all alone. also, if it where me, I would take your plant/plants & put them in another room/closet or what have you, if possiable, & start treating them every other day with your "spider mite" regemine, atleast for a week! In the mean time, be cleaning your grow room, walls/floor/ceiling/ everything in there really! Make sure you wipe down everything!! I would use a "mixture of whatever your using to treat your plant/plants, "neem oiil" is what I used to treat mine & also wipe down my grow area with, & I havnt had not one issue with the little bastards since!! I hate them fuckers!! There the devil !!! Anyways, that should fix your problem. Also, try in get that PH level down a few notches. hope that helps bro..

Yeah, I've seen the charts, but not my particular problem on them.
Mighty wash is a very effective mite killer but has no deterent powers. So I just use it when I see em. I'm sold on it as it is 100% enviromentally safe and it works. ( Just wish I could figure out how to make my own ).
I did consider phosphoras def. as a possible, but they have only been in their current soil for about 4 weeks, since transplanting into a bigger pot, and I didn't think FFOF was phosphoris deficiant. I usually don't start feeding until around week 6 or so as the soil generally has enough to keep them going that long at least.
Maybe I will start using ph down to bring the ph into a more acceptable level like 6.5 or so, when I water and see what happens.

Thanks guys, any input appreciated.

Well bro, you could always use a "base nute" somthing that would have all the nutrients in it, & that would 4 sure NAIL the problem!! And wouldn't hurt a thing either! Hell, I use a base nutrient, Jungle Juice weither or not they need it or not, & its never hurt um! And I've been growing for 13+ years or so. And although over the years my nutes have changed, I still do almost the samething I did back in the day! Well, when I got my groove on & was able to grow from seed to flower without having any problems!!

Originally Posted by ~Dankster~420

Well bro, you could always use a "base nute" somthing that would have all the nutrients in it, & that would 4 sure NAIL the problem!! And wouldn't hurt a thing either! Hell, I use a base nutrient, Jungle Juice weither or not they need it or not, & its never hurt um! And I've been growing for 13+ years or so. And although over the years my nutes have changed, I still do almost the samething I did back in the day! Well, when I got my groove on & was able to grow from seed to flower without having any problems!!

Good idea. Sounds like you have your grow down.
I've recently started using Jacks classic Citrus feed as a general purpose plant food. Its a 20-10-20 with magnesium (1%), sulfer (4.9%), Boron ( .02%) , copper (.05%), Iron (.15%0 Manganese (.075), Molybdenum (.0009%) and Zinc (.05%). As an all purpose that I feed my plants in veg as well as in flower.
I'll check out the Jungle Juice later and see what it looks like.
I tend to be wary of overfeeding my plants and try to give them what they need as opposed to force feeding them. I'm just trying to learn to 'read' my plants to see what it is that they are really in need of rather than having to deal with overfed plants.
Also I really need to get a ph pen rather than useing the ph strips, as that would prove more accurate.
Do you use any particular 'bud builders' or any other flowering type nutes or additives to increase bud and trich growth?
Thanks for any input, good advice.