- Rust - brown - on cannabis leaves - Grow basics marijuana

[manymen85]

can anyone tell me for sure that this is? iv got same on some of my plants 2nd week of flowering any help be good thanks



[wirikuta14]

@manymen85 I just asked the support where I bought my hydro setup, they sais its nute burn, and it happened after I added 20 liters of nuted water, then realizing I should have added 24 liters for those nutes! add water, they´ll recover fine.

[misa190184]

Hey dude, did u find a solution??? ive got the same problem and not sure what to do....what did you try? please help...i will try to flush and use just water from a week or so and lets see how it goes...

[tribeo15]

It's due to over feeding. It's nitrogen burn. Flush with luke warm water really good for about a day allowing the water to drain all the way then place em back in the room and use just water for about a week. Then use a half dose of nutrients once a week for 3-4 weeks then you will be back on track!

[mdp1991]

I think it might be the distance of the lights or the amount of water u give em, buz mine looks like they are starting to do the same

[theFR1END]

Yo my plants are looking the exact same way.. Feeding them calmag right now. If you're using RO water then it's more then likely calcium, magnesium, or iron deficiency as the RO water is low with these. Hope your ladies are good. Reply back if you found the problem I'd like to know for future reference.

[lohmoelle]

so how they doing now????

[buDDdiE420]

My girls are doing the same :( does anyone know how to get rid of it? I just flushed them & let them sit 2days before I gave them nutrients. I saw some changes as in the curled leaves turning back up but it seems there still browning! Can someone please help me, it would be a shame to see these beautiful things go to waste....

[SwampDonkey345]

no way is that a fungus that is being burn from to much nutes. slow down take a step back flush for a day or two and then go back to schedule.

[newmedgrowr]

for sure a nut burn.i had 12 in flower sensitive to the nuts so i cut back a bit and problem solved.

[chr1st1an20061]

nutrient burn starts with the tips of the leaves burning. not a mottled rusting of the entire leaf !!!!!!!!!! deficiencies cause a variagated discolouring ! Simple really.. if you are using the recommended amount of nutes you will be fine. flush regular if you use recirculating system.... which is why i use the run to waste scrog method. Trust me - google - "rust fungus marijuana" ! dont listen to all these other fools who have probably never raised a seedling let alone pulled off a crop

[chr1st1an20061]

rust ! rust ! rust ! too much humidity ! poor airflow ! no doubt !

[oldskoolhead0]

i read somewhere that the instructions on most nutrients followed by recommended dose = massive over feeding which in turn = irrepairable dammage to plants = low yeild which makes good business sense if youre the md of canna but not if youre growing pot.......solution buy an ec meter and dose correctly and only feed once a week max if growing in soil then if any symptoms occur treat accordingly as symptoms of under feeding are easily treatable and dont affect yeild overfeeding however......

[AnonymousGreen1]

My man THAT is an INCREDIBLE example of a calcium def! You need some calmag!

[iamjust2stone]

what ever your spraying your plant with stop it.

[prestondog9]

Looks a lil like chemial burn lower the nutreince

[davidsbhs44]

Rust fungus for sure. My plants had that problem before. Get treatment fast and maybe even a dehumidifier if the humidity gets too high. Try to keep humidity between 40-60 if you can.

[ericfromkokomo]

its Rust Fungus

[86daytonaz]

Im having the same the prolem ! . Did you find out what the problem was?

[bulldoggrrr]

i strongly disagree that it is a simple nutrient burn, rather i agree with legion2k. this plant is showing obvious deficiency in my opinion. And i would bet that the ph is causing lockout and that is a more likely culprit in my opinion. nutrient burn doesnt cause dark shading around veins. it has some nitrogen burn but i disagree with that being the problem, just another symptom which muds the diagnosis, and actually leads you away from the actual issue. My opinion. PH is crucial.

[BULLOCK1973]

I would say ph or nutriants over load

[asamayub]

i think some people are pushing it with mold, fungus or even potash, Mg, cal..

this looks more simply like a nute burn, and nothing else at all!!

MG deficiencies, DONT Like so... Fungus Dont look like so... Potash Def, or Cal Dont like so.... check up on the GREAT CHART OF LEAF SYMPTOMS..

my guess (good few yrs of exp too_) i that u slightly went over on the feed, simply flush,. hold of all feeding a couple days and re start at quarter dose...

voila!¬

[bigfootchronmasta]

It does look like some sort of fungus- use neem oil mixed as directed. If it was nutes they would be more uniformly burned, with leaf tips browning, and bottom leaves droppin'- hope this helps

[darrellicker]

Potassium deficiency

[yogi1414509]

DID THAT SPRED FROM ONE PLANT TO THE OTHERS

[Krankyank32]

deff potassium deficient

[BigHaze420]

there is no possible chance that this is a fungus or a "rust" rust is black leafs and this is 100% a defiency of either magnesium, zinc, potassium or possibly manganese look on this website

[legion2k]

@BigHaze420 You're right. The only thing rust on that is the color. Def by incomplete nutes, lock out, or pH issues.

[reensmoka]

@BigHaze420 thought about "iron"

[CaliforniaBudtender]

This does not look like a fungus or mold. A plant that looks like that should immediately get flushed with three times the containers volume in ph'ed plain water. Then started back up on nutes slowly making sure that the nutrient solution is of the proper ph. Many nutrient imbalances occur when the Ph is off because the plant cant digest certain elements out of its Ph zone.

[urajokeMC]

hope you understood that lol.

[urajokeMC]

you said it was bag seed? probably out of a brick..? when I was a kid I had this same problem. pick off as many dead leaves as ya can. spray it at night with distilled water (ph 6) see wbayt happens. or just harvestmade either whensaid tris are asyou milky/ amber as youI can get ema and salvage the rest. good jobto concidering all youI battled!6

[MegaPitbull12]

nute burn

[Twistsayin]

To much nitrogen mine looked exactly like that,I flushed it and they recovered.

[nickdogchillin24]

Yo....It 100% (Fe) aka IRON deficiency!!! Buy some some solution with high in iron. Mix with good water. Spray the shit out of your plant for 2-3 weeks and she will pop right out of the rust , burning yellowing state in know time. Just a lil FYI.....Master growrer I am....

[masterjmich]

so did it turn out to be fungus? I have the same problem right now; I do think its a fungus tho.....

[chr1st1an20061]

it is fungus !!!!!!!! treat with a systemic fungicide and check that humidity is not too high - pick off all rust affected leaves and discard so as not to spred the fungi - should have been dealt with at first signs of symptoms - i reccomend fongarid ! - this is not over fertilisation - when this occurs the tips of the leaves "burn" - make sure you are flushing well and measuring the parts per million of your nutrient solution - but this has nothing to do with ferts ! peace

[2188kg]

@chr1st1an20061 yep you are right fungus nats. Their feeding stresses the plants and provides an entryway for disease pathogens. The first symptom of damage is usually wilting, followed by general decline of the plant.

[ReeferRevolution]

less npk more calcium and iron

[ericfromkokomo]

its rust fungus

[MrOldways]

Flush it with about 15 gallons of fresh water & remove the dead leaves... I have had the same problem & what I just recommended worked for my girls.

[martinezmatthew]

@makegoodfood hmm that's a tricky one...if you haven't used any nutrients it couldn't be a nute defficiancy it could be heat stress! depending on the light you are using but im not sure i need info on it!!

[vap0xD]

what kind is this?im only 17 and i want to learn a lot about weed..reply pls

[starsinpalm]

im having that exact problem except i was at week 2, using hydroponics and 0 nutes, I bought cal-mag in hopes of fixing the problem but the leaves are continuing to turn brownish yellow and are turning upwards....probably my last hydro attempt to many problems

[rfull007]

to much nitrogen. small white/red dots are the first indicator. fan leaves normally show first laterally along veins. you need to base out your soil yo. trim to encourage new growth and use filtered tab water. hold of on fertilizer until new grow shows no systems. or clone those flowers now.

[MrStemroach]

what are you feeding it? looks more like a defiencey than over fert

[bigdaddydeegs]

bad water..ph was probably way off or you just let it dry out to much before watering

[MedisMan]

Flora Kleen ftw

[MISTABEANZ2011]

you should see my lowryder #2 plant im about a month from harvest and the whole thing is yellow. it is hydro so i dont want to fuc with it to much besides clipping off the disease yo

[kingkola1p]

@MISTABEANZ2011 its not a disease ur nitrogens off

[oneandonlydaddy]

@makegoodfood fox farm soil is loaded with nutes so if you are ''feeding'' your clone instead of just watering it you definatly are burning your plant....wanna see a very healthy plant?? check out chronic stories  pretty informitive

[nismogtp]

over fert

[johnartmaster]

did you find out what it is ?

[1690edgington]

Lesson the amount of nutrients your using.

[lastpatriot4America]

PH to high or to low. I just battled this same thing.

[MissHoneytree]

nute burn and what looks like miteage. flush, then stabilize at 6.3. id say mag def, except leaves aren't curling up and usually exhibits darker bronzing.

[AkFlexer]

Yep looks like nute burn, or possibly ph lock out. Flush and fresh nutes at 3/4 strength. Wont repair the damage done but will prevent more discoloration from appearing.

[lastpatriot4America]

Man mine are doing this now... Did ya get it fixed..??? I am gonna flush system. I am growing in water... Help

[MrMutualRespect]

looks like nutri burn to me mate

[mighty690am]

hey i just transfered my plants to dirt and noticed this happening also.... how do i fix it? First time medical grower, could use any help? dont want to fail this early with bluberry ?

[r3DL3TTUC3]

@mighty690am eas your way with the nutrients. some plants are more sensative then others. flush it by watering it with water once a week. make sure no nute buildup. hit me up

[mighty690am]

@r3DL3TTUC3 thanks seems all better...

[osnapjack]

so this rust color is not powdery mold?

[zuuluu1]

Besides the problem nice plants bud! The leaves r burnt. When u hear about burning ur leaves this is wat there talking about. U probably gave it to much nutrients. If it isnt that check the ph. It is one of these problems for sure. Ive had it happened and helped numerous people for this problem and there is no disease that does this so it can be easily corrected. The rust colored spots wont go away where already effected but it will stop the spread and grow like nothing every happened.

[ffdave117]

I had the same problem. I flushed with water for a couple waterings then decreased my nutes from 1 tsp per gallon every watering to 1/2 tsp per gallon ever other watering.

[callmeshitface]

it seems that you have given the plant too many nutrients. this has caused salt build up on the roots, so the nutrient intake has stopped. this means your plant shows signs it needs more nutes but this is not the case. you need to flush the plant. if you add more nutes, you will be compounding the problem.

[sniper1420]

low ph. leaf veins are red and should be light green and lush. tops bleaching too much light/heat. use 1 part tap water to 4 parts ro water/ bottled to buffer the ph when u add nutes. plants only drink water at 6.5 to 7.0 ph and eat nutes at 5.5 to 6.5 ph. a static ph is not going to be efficient. set nutes at 6.5 to 7.0 ph as plants drink the water the nutes will concentrate and lower the ph giving you a float. the key is only let them feed briefly then let them drink 6.5 to 7.0 ph

[JaysWorld3000]

this keeps happening to me too. PH keeps fluctuating to low. Check the PH if is low add water till it comes back up. Also google "ask lucas" some think he knows GH better than GH does.

[dannman4209]

that sux man GH mabe idk id have to see it keep it up tho thay look dank

[hackysackholder]

i not 100% sure but i would say to much nutes

[bingramtube]

I see some damage from thrips (pin holes in clusters) and burned leaf edges from over fert in your atttempt to keep her green. FLUSH soil wait 1 day then very light fert balanced to your likeing and PH about 6.7-6.9  should stop the bleeding and get her recovering

[MrHitmanmatt]

i think its your dirt needs iron check out this video ............. Daphne Richards analyzes yellowing leaves: Central Texas Gardener P.S its on youtube 

[nownudda]

GH thats the problem...

[MedicinalGrowRoom]

@nownudda Yeah this dude knows what's up!!!! GH is crap

[court156]

Hit it with some fox farm big bloom with the micros and macronutes it needs to fight off a disease and recover from it, you can use it through the whole veg and flower cycle.

[tubinmywayhome]

I have exactly the same problem but with much younger plants. I will follow this and see if I can benefit from your post as well. Good luck. I wonder about overwatering and light quality. One day in the sun made some difference in my plants. Time to go with better light and a reflector maybe.

[DJskatesome9]

same thing happened to mine msg me if you found the problem please

[TheMTmedical]

MILDEW MOLD RUN A SULFER POT

[kevlova2]

Could be burns from the light or over nuting the plants dude