Brown / Rust spots all over lower fan leaves

LUDACRIS said:

bullshit.

LUDA.

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your bullshit LUDA learn your plant problems and stop giving bad advice. yes its mag def. 100% that early in plant life IF it was mites, would have NO brown spots. that plants what 3-4 weeks old? mites need to infest for a solid six weeks to BROWN spot damage. the mites need time to eat plant, plant needs time to brown the damaged spot.


i get this as well in every grow i do. at first sign i spray with epsom salt foliar feed @ 1 tsp per 32oz of water. make sure to use 2 oz of warm water to desolve the salt. fill rest of the way with cool water. spray 2x week till problem stops. should take no time at all, your plants will respond very well and fast to a foliar feeding.

peace \m/ SOTW

Get some Cal-Mag and add 1 tsp to each gallon of water (every watering). Problem should go away within 5 to 10 days.

consume said:

Here's a look at one of my plants. No bugs, but rust color on lower leaves.

I had been using rhizotonic as a foliage spray once a day.

Aero system, with Canna aqua veg at 600 ppm. 1 week in veg.

Any idea what is going on?

First two pics, top of lower leaf with problems. Third pic is of top growth. Fourth pic is the bottom side of first two pictures.

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i have this exact problem, which was mainly just older bigger fan leaves but now its moving on to basically all the fan leaves except for the really new ones..
I foliar sprayed with some epsom salts about a week ago and they have only deterioated more..
Is the consensus still Mag def?
The plants is about 2 months old in coco using canna coco a+b.. other strains of various ages some showing slight signs but others showing none at all

Edit: i have to add that the rusting is mostly concentrated BETWEEN the leaf veins and more spread along the whole leaf, but its very similar and im sure its the same as Consume's pic.

bump

I use DWC with R/O water and GH nutes I had those same spots on my leaves too. I've started adding cal-mag 10ml/g to my regular nutes. All the new growth is fine...

t0hkin said:

I use DWC with R/O water and GH nutes I had those same spots on my leaves too. I've started adding cal-mag 10ml/g to my regular nutes. All the new growth is fine...

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thanks man.. well im gonna have to go ahead and start blind with the cal/mag cos ive just noticed the same rust shit startin up on my whiteberrys now..
It occours in between the leaf veins

Looks like either a calcium or mag deficiency, check this site for examples and you'll see problems that look just like yours http://www.ganjaguerrilla.net/index.htm Everyone should have this site book marked, it helped me out many a time when I couldn't find help here, and I'm only half way through my first grow. lol

I had a similar problem recently, I thought it was nute burns at first because I had more deficiences that turned the leaf tips brown. I fed them with just 1/3 teaspoon of FF Tiger Bloom per gallon and it stopped. So my brown spots must have been a mag deficiency because FF Tiger Bloom doesn't have calcium.

Cal-Mag would cover both bases just in case, and personally I would also feed them something else so I can cover more of the minor nutes just in case.

And there's no way it's Mites. I see Luda's spreading his bad advice here too. Not only does it not look like mite damage, but if it were mites, by now they'd be way out of control and all your plants would be dead.

that floranova grow has too much Calcium and is causing a Magnesium deficiency.

yip deffinitely a magnesium problem after checking this site out http://www.ganjaguerrilla.net/index.htm thanks Imaulle that sie you posted i will seriously book mark if i were you chaps. i go the same problem with the leaves cupping upwards a little then eventually the droop a little then that rusty shit starts. going to get some epsom salts right now... cheers

I had the same in my white widows it was a mag deficincy i started doing a carbo mag feed it cleared up

hoots123 said:

here is a couple that have rusted bad.. and i really have no nutes in these onse.. some are seedling femenized seeds and the others are clones.. but ya this is when the rusting's gone wild.

wow they look bad haha! damnit.. i neglect them a bit too much sometimes.

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I am having this same problem has any one determined what is causing this

Spidermites as well? Already checked for black dots and there are none.. week 6-7 of flowering..

old thread... but thanks for the info, I was assuming i have a mg def and I was going through forums just to see if any had same problems. sure enough mine looks identical to most. with no spidermites to speak of. Thanks for that link of GANJA GUERRILLAS! bookmarked and rep to you!

Boring Infos:
-dwc setup
-lucas formula
-ph 6.0
-ec 1,0
Same problem: RUST SPOT

I think it is cal mag def but my nutrient label say:

FloraMicro: N 5% K 1,3% Ca 7% ......

FloraBloom: P 5% K 4% Mg 3% S 5%.

I'm using Lucas Formula at half strenght: 4 ml M 8 ml B per gallons.

I don't know how much calcium and magnesium a plant needs but i think this formula has enough cal mag.

What do you think?

I hope you could help me because i really dont' know what it is...

i've had my leaves looking like this too and i've had spider mites. The spider mites were white spots (I used a neem oil spray) and the rusty spots were a mg def, but also heat stress will produce a similar effect to the rusty spotting only fuller in color instead of spotty in color.

LUDACRIS said:

bullshit.

LUDA.

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its not mites .. too many nutes..

hey did u ever get the solution to that problem?

Im having the same problem. Its not spider mites ive checked over and over with eyes and 30x and 60x magnifying glass. Ive seen spider mites before. Im curious to know what it is though. If anyone has a good answer besides spider mites please post! I just started doing some research on it. I think i might be over fertalizing im not sure though.

ph is more accurate, mite's are visible once a mite problem gets that bad.