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Back to Grow Questions
Manganese deficiency or rust?
Gemini_Grow
started grow question 6y ago
Could it be manganese deficiency or rust? Few upper leaves are affected this ways showing some brown dots.. Could it be due to a PH fluctuation I had recently? Need some help
Solved
Leaves. Color - Dark-brown
Feeding. Deficiences
likes
Trichsteppin
answered grow question 6y ago
I think lt looks like P abundance which will lockout Magnesium and calcium
1 like
Complain
Selected By The Grower
Athos
answered grow question 6y ago
Textbook potassium (K) deficiency
1 like
Complain
Similar Grow Questions
Solved
Killerz224
Leaf burnt edges
One leaf has burnt edges and is a little different looking, than the other leaves. Is this some kind of nutrient burn? I am using a light mix soil, and have not fed the plant with additional nutrients, except for a little root stimulant (half of recommenced dosage).
Week 4
Leaves. Edges burnt
Feeding. Deficiences
5y ago
2
2
Solved
ThcSrb
Spots on leaves and little twisted...
Spots started slowly showing when it had a different 600w light, too much heat back then, this started a little "save operation" changed light, made the plants look a bit healthier but now it looks like the spots have spread and also affected the leaves above... Are they healthy?
Week 3
Leaves. Twisted
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
1
5
Solved
KCduzit
Brown spots on bud site leaves?!
halfway through flower and now in week 6 flower one of my plants is showing some large brown spots on only the upper leaves. I’m not sure if it’s a light or ph issue as the light is close. I stopped cal mag and some nitrogen this week but spots were showing up before.
Week 14
Leaves. Color - Dark-brown
Leaves. Other
5y ago
2
2
Solved
elevensixty6
Brown Spots on Leaves
I've got some brown spots showing up on the Wedding Cake leaves, first thought it may be mold but it doesn't rub off and I sprayed both plants with neem oil about a week ago just in case. Could be CalMag deficient? I use RO water with about 150-200ppms in 3 liters once a day.
Week 5
Leaves. Color - Dark-brown
5y ago
5
4
Solved
Cannabud13
Too much water? Not enough?
Too much water? Not enough? Gsc Auto day 40 and struggling this week. FF OF+ Kind Soil so no nutes. Temp 73-76, rH around 60. Water around 1L/week currently
Week 7
Leaves. Wilting
Plant. Wilting
Feeding. Deficiences
5y ago
2
1
Solved
BeachGanja
Calcium Issue?
Hey everyone, got some limited leaf issues on the older growth. Appears to be a calcium deficiency, but would like your thoughts. 😎
Week 5
Leaves. Color - Dark-brown
5y ago
2
3
Solved
Kenny82
Browning sugar leafs
Thanks for the tip it just so happens that I have Epsom salts as I already checked the water and soils ph, 👍
Week 5
Leaves. Color - Dark-brown
3y ago
2
Solved
Greeneyedgrower
Color change.
I always get nervous when the leaves start to change. So my question is, this is natural right? I would guess they are a couple weeks away from finishing?
Week 8
Leaves. Color - Dark-brown
6y ago
3
4
Solved
hanniversary
Brown tips curled up
So my plants are in a glass greenhouse that can get very hot on a sunny day but its not always scorching. one out of two plants has brown tips curled up on the all the leaves. Should I be worried about this? Thanks very much !
Week 7
Leaves. Color - Dark-brown
5y ago
2
2
Solved
Misanthrope
Orange/Rust Spots on Leaves
I keep getting these spots developing on my oldest mother, the MAC. She's probably rootbound, it's been about 4 months since she potted up. I need to keep her in a cup for space, will deficiency get better if I just trim about 50% roots and plant back in a cup with fresh soil?
Week 3
Leaves. Color - Dark-brown
Leaves. Other
3y ago
2
Solved
Michael1234
too many nutrients?
I am asking for advice, is it possible that my plants got too much fertilizer. I watered them in the fourth week, I gave them 0.5ml per liter once CalMag, Bio-Bloom, TopMax, Fish-mix,Biobizz then during the 7th week 1 ml per liter CalMag, Bio-Bloom, TopMax, Fish-mix,Biobizz
Week 6
Feeding. Chemical composition
Feeding. Deficiences
4y ago
2
4
Solved
TheHighNews
Mango Smile should i add some nutes or i can just give more of what i use?
Sto nutrendo questa Mango Smile piu di tutte le altre piantenma continua ad essere l'unica ad avere carenze viene nutrita con calmag e biomagno fioritura OM ma non sembra migliorare alle altre piante dò metà della dose consigliata a lei tutta la dose raccomandata, consigli?
Feeding. Deficiences
5y ago
2
2
Solved
Hermes88
Help me please. Thank you so much.
Hi guys I need some help with my little plants, I have three plants one of them it's all right but the other one has this problem, I don't know if the problem is nutritional excess or nutritional deficiency, or maybe the irrigation.Instead for the topleaves look at the last phot
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
2
3
Solved
Flauros
Help please with feeding advice.
Hello. Input: Calmag 120ppm, Pk 150ppm, A+B 160ppm, megafol 51ppm, melassa 5ml, Total input 739ppm, 5.97ph. Output: first drainage 1000-1100ppm. Last drainage output: 5.7ph, orange 960ppm, Cbd 817ppm, Zkittlez 1000ppm. Dont understand, what happened with my girls after 3days late
Week 7
Feeding. Deficiences
4y ago
2
1
Solved
ZigkGrow
Pest or Deficiency
This leaf seems also bitten. There are 4 bitten leaves. I will be checking to see if they become more. Is this white powder?
Week 3
Other. Bugs
Other. Mold
Feeding. Deficiences
5y ago
1
Solved
minibox
Calcium or roots trouble?
Hello happy grower, New week and new trouble but on the second plant. Those brown dots appear today. Is it a cal/mag defficiency or roots trouble? I will check roots tonight. Thank you forward for your advise!
Week 6
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
3y ago
10
11
Solved
Coconut_kiss
Discoloration and brown tips
Nutrient burn or something else?
Leaves. Color - Dark-brown
6y ago
1
4
Solved
CHILLING_RACOONS
️️Big problem: Leaves ️️
Hi dear friends! I have leaves problem again. Leaves from this Runtz are crispy and they aren't "smooth." since last week I didn't gave any nutrients but only ph water. Syntoms may be a potassium deficiency but I don't know what is the problem. Please, what I have to do to?🙏🙏
Week 10
Leaves. Tips - Burnt
Plant. Stem - Red or purple
Feeding. Deficiences
4y ago
1
2
Solved
Walleyeguy
Spots on leaves and yellowing. Lower leaves. Dos si do
Have some spots on dos si do leaves as well as yellowing. Thinking it's a deficiency. Possibly calcium. It happened right after a growth spurt. It's a coco grow. What kind of deficiency ?
Week 6
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
3
2
Solved
BobRoss
Brown spots on seedling
What are the Brown spots on my seedling? I did not put mist or water on her.
Week 1
Leaves. Color - Dark-brown
Setup. Seedling
4y ago
3
4