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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
Lancelot420
Help me please
Hello everyone! I'm currently in the 2nd week of flowering and I've been dealing with this issue for a month now. I haven't been able to find the source of the problem. What should I do? Thanks for your help :)
Leaves. Edges burnt
Leaves. Color - Dark-brown
Feeding. Deficiences
4y ago
3
6
Solved
fragmentsoftime
Hi, last weeks my plants started to show symptoms of nitrogen deficiency. last 2 times i watered with 1,5x nutrient. Now they look like that, do you have any advice about the plants? -water 6.5 ph -120x120 tent, 240w QB Nutrients: t.a pro organics grow-bloom, aleo vera spray
Leaves. Color - Dark-brown
Feeding. Deficiences
3y ago
1
Solved
XanHalenTGI
Progressive rusty spots on leaves
been upping calmag .5 each feed, still getting worse, if not calcium deficiency... what is it? should i keep upping calmag? running 2ml/gal currently. bud development is still good, not stunted, good structure and trichomb production, great smell.
Week 7
Leaves. Color - Dark-brown
Other. General questions
Feeding. Deficiences
1y ago
18
10
Solved
Germaican
What deficiency is this ?
What is happening to my plant right now ? I believe it is calcium deficiency also could be Manganese from the pictures. I did not add CalMag during the first weeks. Usually Calcium deficiency shows after 4 weeks and during flower but not likely in soil. Started around 6th week
Week 7
Leaves. Color - Dark-brown
Setup. Strain - Autoflowering
Feeding. Deficiences
2y ago
5
3
Solved
Drizzy315
6 week flowering leaves turning black/ purplish color?
Hey guys I’m new to the site and fairly new at growing got a question. My plant seems pretty healthy for most part but recently what appears to be black color taking over the leaves ? Is it phosphorus? I been giving them plenty bloom nutes. It week 6 about. Any idea what it can b
Leaves. Color - Dark-purple
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
2
Solved
Ionic20
Advice please :)
This is 24 hours later. Should I just give some calmag now even tho the soil is still damp?
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
3
3
Solved
Goenndalf
Rusty Leaves
3 upper fan leaves have "rusty" brown spots on the upper side. Hard to spot, hard to capture on camera. I also have slight "clawing" on many of the upper leaves. Mg/Ca lockout because of nitrogen toxicity possible? Doesn´t seem to be fungi, as there are no spores to rub off.
Week 8
Leaves. Curl up
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
2
2
Solved
ssfm_ssfm
Are those nutrient defficiencies? Which ones?
A plant had interveinal chlorosis on new leaves and then proceeded to show brown patches between veins on middle leaves. Another has coppery brown spots on leaf edges on the middle of the plant. Both were rootbound in living soil (peat/perlite/hummus + ammendments).
Leaves. Color - Dark-brown
Feeding. Deficiences
Techniques. Topping
2y ago
1
Solved
Losqui
Spots on leaves
Hi mates, what do you think about those points.we are at 4 week flowering, soil and canna Flores. Are they insects bite or some nutrients issue? Thanks in advance
Leaves. Color - Dark-brown
Leaves. Color - Mottling
Feeding. Deficiences
5y ago
1
1
Solved
Greenbean420
Browning on leafs mid flower!?
Hey ive got browning on 2 plants leafs mid flower? Could this be a Calmag deficiency or is it normal? Only been using biobizz grow at 0.5ml/litre and bloom and topmax at 1ml/litre. Thanks!
Leaves. Color - Dark-brown
Other. General questions
Feeding. Deficiences
6y ago
1
2
Solved
Gemini_Grow
Manganese deficiency or rust?
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
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
1
2
Solved
TschupZ
Possible lockout, what could've caused it, all 3 get the same water & feeding
Hey, i'm new as grower and really glad about any tipps I got some rusty spots + pale looking, tested the runoff and need help reconstructing on what went wrong IN: 2l Osmosis + 0,6ml calmag + ph down 7 - 6,5 -Ph: 6,5
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Leaves. Color - Dark-brown
Setup. Strain - Autoflowering
Feeding. Deficiences
2y ago
5
4
Solved
TripleCcannabis
deficiency?
Is this a boron deficiency. If not whats going on with this girl
Week 4
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
2
Solved
FiFrElOt
Demande de diagnostic
Hello, I'm currently in week 7, my problem has been going on since week 5 and I can't identify it... Has anyone ever had a problem like this?
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
Feeding. Deficiences
5y ago
2
2
Solved
N1xon
Calcium deficiency, cal-mag now in hand, water now, or wait for normal scheduled water? Last water yesterday.
Plants are suffering from an early stage of calcium deficiency, received a bottle of cal-mag today. Watered last night cause I didn't want to wait any longer. Should I wait for my next water (2 more days) or give a single dose of Cal-mag now, to get some calcium to the plant?
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
4
3
Solved
Goenndalf
More rusty spots
See this now on more and more leaves. Only upper fan leaves that get good light exposure seem to be affected from this and also the clawing. Have backed off the nutes completely for now and will add ground egg shells to the water in the hope its a Ca deficiency.
Week 8
Leaves. Curl up
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
1
1
Solved
Mosherd7
Unknown rust on 7th flowering week
This started as what I thought was a cal/mag deficiency, bought some, gave it for a week at a good dose and 6.3ph, and this intensified and switched from just lower leaves to the upper and a few sugar leaves on one plant. Any ideas? May calmag takes awhile? Or wrong diagnosis?
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
1
3
Solved
Chihuahuenynos
Coco Issues, over/under nutrients?
what can cause the brown/gold spots in the plant #2 and the yellow/brown tips in plant #3 recently had high humidity but already corrected. the coco didn't dry much. also, plant #5 dont grow in height pls help <3
Week 3
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
7
3
Solved
jbirdstheword
Burn, deficiency or other?
I’m completely stumped as to why my one plant is showing signs of deficiency or burn. Used the exact amount of fertilizer per plant. One plant is fine and the other looks terrible. I used a half dose of cal mag and it seems to have stopped but is not drinking or looking better.
Week 7
Leaves. Curl down
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
3
2
Solved
Aonjacktallbeck
Ph problem?
Is this a ph problem or something else? My meter doesn’t seem to be accurate. I’ve been feeding top crop veg once a week and ph 6.3 (soil), my run off was a bit high, a gave just plain water (ph 7) but no help. Photos from two plants. Heeelp
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
1
1