Sickness spreading from bottom to top- deficiancy or burn? (pics)

I've done a lot of research on this, but this is my first grow and im not entirely sure as to what i need to do. I think it is either a lack of phosphorous, or phosphorous burn. Or it might be a PH problem, my soil tester is really shitty but says 6.5. The water ive been using is 6.5 as well.

I'm using MG time release, with no nutes added yet for fear of burn (its 6 month time release). The only nutes i have right now (that i havent used yet) dont list phosphorous in them, but lists phosphate.

Plants are 4 weeks flowering, 400w of CFL (side lighting) and four 40w full spectrum T12's.

They are showing signs of yellowing leaves, brown spots, RED everywhere except the leaves and bud.

Any help is much appreciated, preferably something i can get from walmart or lowes



if there's any other information i could give you, please let me know. I'm worried my first grow will be a failure ;-;

Thanks so much

This is aprob you dont have to worry about its time to harvest ! will be a merry xmas now frosti.

*BUDS said:

This is aprob you dont have to worry about its time to harvest ! will be a merry xmas now frosti.

Click to expand...

They are only four weeks in lol

there is not much you can do sad to say. the more you water with the time release the more it will fertilize. so it will be impossible to flush. MG meaning Miracle Grow I am assuming. Do yourself and everyone else a favor and boycott that company. everything from basic flowers to herb dies shortly within a months span or 2 of using MG. At least that has been my experience.

Lower your temps and they will not transpire as much. it may help with the burning...... but no gurantees

they do look pretty hard into flowering, 4 weeks huh. they have some fatty little nugs

Same here bro, I would harvest now. With MG it's a gamble for sure, the more u water the more nutes it gets, bummer. She looks real good, before that burn goes further I would harvest.(you shouldn't try to transplant at this stage either)...

Thanks for the help guys. How long can I delay harvest? There's no amber trichs yet..as matter of fact there's hardly any cloudy ones :/

next time foxfarm ocean forest soil. abslutly perfect. and u probably got a week. but it aso depends on how fast its kiling leaves. truely going to have to take it day by day but dont wait toolong as im sure you already do

mydanksstank said:

next time foxfarm ocean forest soil. abslutly perfect. and u probably got a week. but it aso depends on how fast its kiling leaves. truely going to have to take it day by day but dont wait toolong as im sure you already do

Click to expand...

Whats that supposed to mean? >_>

Also in other news the closest fox farms retailer to me is a two hour drive:/ is there anywhere to get individual bags online? I just see bulk.

drive the 2 hours

its a potassium deficiency. you need more potash. marijuana loves phosphorus and potassium. miracle grow provides shit for phosphorus and potassium for pot at least.
plants take up phosphorus in a phosphate form, but you can definitely use a bit more of that. but it looks finished now weirdly. maybe its the cfl and miracle grow complex. next time get foxfarm ocean forest and an hid light.

One thing I did notice in pic 2 and 3 is your temps. Im not for sure but they looked like they where in the 80's, Thats kinda high. Not terrible but high. I would recommend trying to get those down some.

Don't worry about the mg soil. I had a very sucessful harvest last year using the MG organics, and the MG perlite. It works wonders. Maybe not what everybody recomends but thats cause everbody likes to shove food by the spoonfulls to their plants. With the MG for the most part has time release nutes, so you cant add any for awhile ( but you did say that).

I wouldn't worry to much about this, as your plant only has a little while longer and before you know it it will be chop time. But if your gonna do anything look for a cheap fertilizer that has a high P-K level and a low N level.

-MRGreenThum