Ok, so after 5 weeks of loving and caring for my babies, they have ALL started turning yellow, and their new leaves looking pretty sorry for themselves. Im pretty sure this is a Magnesium deficiency, (ill blame Mr Ed Rose if im wrong!), so have been treating with Epsom salts. Ive been doing this for a couple of waterings, about 2-3 days apart. Do you think I should lay off with the nutrients while im doing this or keep going?

I guess it may not be Mag problems, I don't think its PH, coz im very precise with my mesurements.

Here's a few pics so the real pros can have a goosy. They ain't great but I think you get the idea. What do you recon?


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I am the worlds greatest ball****er and I like stealing other peoples photos.

I Had The Same Problem Fox Farms Big Grow Helped Out Was A Nitrogen Thing.lack Of.

I agree with bonghitter, but I'm also curious if theres some heat stress going on too? How close is your light? what size?

Howdy VonDiddly,

They don't look THAT bad..so I wouldn't go planning any funerals ..just yet..

Questions that came to mind (on top of what Video and others asked) is what kind of soil are they in? Do you have a fan blowing air on them 24/7?

ISO

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wop, that is a nitrogen lack - either to a lack in your fertilizer mix or to a pH caused lockout.

how do you pH?

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Keep the gun oiled and the thumb green!

Ok, so the Ph is 5.8, as recommended on the side of the nutrient bottle. I use a digital meter so the level is always bang on. The light is a 400w HPS, about a meter away from the top of the plants and there is a fan blowing lovely cool air all over. The soil is the wright stuff. Its only like the last 4-5 days that its been going on, it started with one, but now its all four. The original plant to get it now looks like theres something eating through the new growth, iv'e checked and there are no pests, so I read something about nutrient burn? Whatever it is its getting worse by the day. I have a few options it would seem, im just learning though, which is why I need the experts!! Cheers for all your help guys. Much love, VonDidly The Kernow Warrior.

okay, then it is pH based - dude you grow on soil mix, as i can see on your pictures, and still use a pH that is designed for HYDRO GROWING!!!

The general optimal point for soil grows is 6.5 pH

so flush your potted soil out, use tap water as you have to raise the soil pH anyway and switch the pH of your water mix to 6.5 from now on as well.

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Keep the gun oiled and the thumb green!

Ok, thanks. I'll try that.

Yeah, when I read PH was 5.8, I was talking to my computer saying the very thing GN wrote. You need somewhere between 6.3-6.8. Good luck.

Greennobody is right on it.Do that and your grow will trun around and green right up. PEACE

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Anything I may say or do is stickly for entertainment only.This is all make believe and is not To believe by me or anyonehttp:\\www.greenpassion.org/f73/over-grow-government-ogg-2009-what-8722/

VonDidly,I agree with everyone who says the ph is to low.I also noticed a few leavs with their tips curled down a bit as well as the yellowing.That could also be a sulfer deficency,try a foliar spray of 2 tsp. of epsom salt to 1 gallon of water.It worked wonders for me.Good Luck!!

Thanks Mekone. I have been watering with a bit a Epsom Salts. Havn't got my hands onto a spray gun yet, but Im sure I can "Borrow" one from work! Thanks again. VD

does your potting mix actualy have soil in it or is it just basicly peatmoss and perlite if there is no soil in it then its considered a soilless mix. the very first pic of urs i looked at the leaves have brown tips which is useuly a sign of over nuteing them the pics of the other plants look fine but its hard to tell with the light on in the pics but i didn't see any burnt tips on the second or 3rd pic also what is the name of the nutes you use and what is the name of the soil you use.

i myself use a soilless mix and was haveing simular problems along with a lil slower growth till i found a forum that had a section that dealt with soilless growing mediums and was advised to try a ph of no higher then 6.5 but no lower then if i rember right 5.9 and now the only problems i have is keeping the lights just right useuly haveing to adjust them 2twice a day or i get leaf burn from the lights

sorry rechecked the other site where i asked about the proper ph for a soilless medium. ideal range for soilless/hydro is roughly 5.3 to 6.3, and gradual pH swing is healthy. and the deffanetion for soilless is if it aint dirt it's soilless or at least thats what i was told

Peat is not a soilless medium ICE!! it is not a nutrition less as soilless mediums are are in general as perlite, sand, gravel, rockwool and similar - coco fibers are a very low in nutrients and minerals.

But that all is peat not, it is used to create richer soil that then holds more water and nutrients - peat mixed with perlite (70/30) will easily support a healty plant for 4 weeks of veg with only water added!!

So trying to grow with peat and act as a soilless medium will only cause failure of the grow. on peat or peat mix soil always adjust the water to around 6.5 pH or watch similar nutrient lockouts and that kill our plants on the long run of a few days.

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Keep the gun oiled and the thumb green!

don't mean to arguee with you but since i started watering my peat grown plants with water phed to 6.0 i have yet to have any problems like i use to when i watered with water phed to 6.5 but who know maybe its just dumb luck that i haven't lost a plant since

Quote:

Originally Posted by VonDidly I have been watering with a bit a Epsom Salts.

Watering with epsom salt can take awhile to show results.Also it can cause a build up of sulfer.By foliar spraying it will deliver it quicker to the plants giving you some results in a few days.Make sure you have a fan blowing on them.Also what brand of soil is it that you are using?

lol ........ Hey im with green nobody on this one.

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Regard,
Closet-DWC

And remember just try and act NORML

Ok, this seems to have started a few 'Friendly Debates'!
Im not sure what the soil is exactly, but im sure its the right stuff because it was bought as a package from a grow shop.
The nutrients are Ionic. I havn't had a problem for five weeks till now.
I shall follow all your advise guys, and of course keep you posted. Ive learnt a lot in the last couple of days. Thanks. Peas.

that stuff is from a grow or hydro store doesn't insure that is actually the right/good stuff - there is plenty of junk in those stores and they never the best source of information on how to grow MM.

As long it is some mix of compost with peat, compost soil or pure peat that you then mixed with perlite it will be fine to grow in. As long it doesn't hold time released fertilizers everything is fine.

and as mentioned earlier: mist with epsom salt and don't feed so much to the plants over normal watering as it can build up in the soil and misting works faster anyway since the plant needs a stable pH first before it can absorb the Mg again.

Besides, Mg causes yellow spots first before the entire leave goes yellow - fast yellowing of leaves is usually caused by nitrogen lacks in veg - my final 2 cents

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Keep the gun oiled and the thumb green!