Nute burn? w/ no nutes?

OK, this is my first grow.
Setup: 400w HPS s&p 6in fan.
Strain: Feminized White widow from Dutch Passion
PH: always @ 6.3 tap water left out for 24 hours min.
Nutes: NONE AT THIS POINT
Medium: Fox Farm Ocean Forest w/ perilite added in 3 Gallon pots.
Temp: 70-74 w/ light on.
Humidity: 45-53%
Notes: Started Flowering exactly 5 days ago, all are clones from a healthy mother.

i thought it was nute burn so i flushed, then i thought "hey i havent given a drop of nutes yet." So i researched and i think its a mg problem, so i bought some epsom salt but have yet to apply it. Just wanted to know what you all thought it might be. Thanks for the help.

my advice would be to check out one of the nutrient deficiency tables. im not sure if this site has one but if not just google "cannabis nutrient deficiency".as you said you've added no nutrient yet so unless the medium you have them in has an excess it can't be that.

Ya nute burn looks nothing like that. Why dont you just give her some good ferts. Pretty much has to be some deficiency if you havn't added nutes... unless maybe its too hot?

Lower leaves? All leaves? More pics helps.

I had the same prob. w/similiar set up fixed mine with R/O water filter system and raised ph to 7.0 hope this will help

422smoker said:

I had the same prob. w/similiar set up fixed mine with R/O water filter system and raised ph to 7.0 hope this will help

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How would that help? WTF are you talking about?

The R/O system would completely clean the water & having a ph closer to 7.0 will insure a neutral amount of N.P.K. that your plant will receive.sorry if I am wrong

K sorry. It seems to be only fan leaves that this is occuring to.... it started lower then moved into the top half. I did a ph of my runoff when i flushed, and it was 5.1. Also my PPM of my water is 190ish and the runoff was around the same. The soil is only 3 weeks old(Fox Farms). I will try and get more pix up tommorow. And 1 more thing, after they get like this the leaves turn a lights brown and shrivel and die, they are crunchy, completely dead. Also the main stem is light green and looks perfectly healthy. I do not wana add nutes b/c the soil should have at least 1-2 weeks left, just guessing from what ive read and do not wana fuck this crop up. Any suggestions would be appeciated. Thank you.

i know u said that u should have a couple of weeks left for the soil, what do you mean exactly? your ppm is the best indication and i don't know about soil but if you were in hydro youd be way to low , hence the deficiency. but aside from that i would have thought that soil would normally last a fair while how long have they been growing for and have you been overwatering perhaps accidentally leaching the soil of what nutrients it did have?.what do you know about the quality of the soil to begin with?

and dont mean to hassle you 422 but getting the ph right will only help the plant have the right amount of nutrient uptake if the soil actually contains them in the right quantities to begin with if theres not enough well theres just not enough but you are right you do need the right ph anyhow.

flush flush flush and see what happens. in FF there is no way your getting a deff really with any nutes that shit is packed to the brim with everything your plant needs. especially 3 weeks in

I have flushed them all very well, about 5-6 gallons a piece. And no im not overwatering them i only water about once every 5-6 days. Next question.. what SHOULD my ph runoff be exactly? right now as i said its 5.1. And does anyone have a link or general idea what my ppm should be @ this moment when watering? They are about 14in tall right now. Thanks

You can also go to weedfarmer.com it helped me alot & fox farms comes stock with all the nutes you need for at least 30+ days like I said what I did fixed mine with the same problem

6.3 to 6.5 is what i like

thats eally wierd your ph is so high... dolomite lime will even it out although FFOF has dilomite lime and is already pHed to 6.3 to 6.8 really if your just using water it shouldent leave that range.


you have a lockout if your ph is that high!

ok so i fed them botanicare pro bloom and 1/2 str. superthrive last night. 1350 ppm. get home today and got a little nute burn, not bad just very little on the bottom little leaves. I've researched and i think i may have a manganese def. b/c of the spots and slightly stunted growth. If this doesnt work i guess ill flush the shit out of em. 1 more thing.... on my smallest plant it has just about consumed all the large fan leaves and is now moving onto the bud sites...... I dunno what it is, hopefully we'll/I'll figure this out b4 its to late. Also a few of the larger leaves tword the top are slightly curling upwards. Any suggestions would be appreciated. Thanks again for looking.

Heres some new pics

skip02 said:

ok so i fed them botanicare pro bloom and 1/2 str. superthrive last night. 1350 ppm.

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You never want to go that high with botanicare, at least not when you're growing with either soil or coco. What's the conversion factor on your ppm meter? It's better to talk about nute strength in terms of E.C. values. The first time I ever grew, I burned a couple plants to death by following the botanicare directions. I never go over 900ppm with botanicare, and that's for coco with no added nutes. For soil that still has some nutes in it, I personally would start at 400ppm and slowly work my way up. Also, the ocean forest potting soil is pretty hot. I had better results with the Happy Frog and it's cheaper...

I'm not sure if you have a mag. def. because it's so bad. In the beginning, a dead give a away is the light green between the veins and the ridges of the leaves pointing up in a V-shape.

The easiest and least expensive way to figure out if it is a mag. def. as you suspect, would be to add 2tsp of epsom salt per gallon of water. If it is, you'll see results the very next day.

When you fed them the nutes, did you make sure to pH your solution after? If you didn't, the pH of that solution would have been around 3.5 pH, which is wayyyy too low.

I might as well throw in my two cents. I can't speak for Fox Farm soil, but as farm as water is concerned you might want to try ro water or distilled water. I tried using my tap water and almost killed plants, I'm on well water though and it's packed with stuff. If you have a ppm of 190 and it is 190ppm of one thing (very unlikely) then it might be casusing a lockout, especially if as bigbong says it is very hot to begin with, you're still making it hotter.

Just to add to what others have said, make sure the ph is right and you do it after you add the nutes. Watering with a ph of 6.3 and getting a run off of 5.1 is really weird as the dolimite lime should have brought that up higher.