The Grow Awards 2025 🏆 
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
Brown rusty spots
Mordelothstarted grow question 4 years ago
Hi guys ! I got somes wierds spots like rust brown ish on the 2nd week of veg in autoflower. I didnt feed them a lot before ( like 1/8 of the reciepe ). Its only on the 2 bottom leaves.
26 degre
60-65% humidity
purple lemonade auto fastbud
Solved
Leaves. Color - Dark-brown
likes
Stonerdanswered grow question 4 years ago
Seems Like a slight Nitrogen (N) and Potassium (K) deficiencies, try increasing the dosage to about 1/4 of the recommended.
Yellowing and blotching from the bottom to the top is a clear sign!
Hope this helps! Good luck and happy growing :)
Similar Grow Questions
Solved
Oggigz
Should i care ? I m going paranoid xDHello guys, i m on day 28 from seed i would like to have some points of view of another growers.... leaves got silvered/brown colored with snowy aspect... not on all leaves but i m pretty affraid of insect and shroom contaminations... thx for replies men and gurls4 years ago
3
3
Solved
Ganjafarmer420flowers
Brown on leafsAny help identifying this only on top couple of fan leaves fed yesterday then today that appeared feeding twice a week fed same as I did last timeLeaves. Color - Dark-brown
4 years ago
1
1
Solved
Shotiie
Still deficiency? Or wrong diagnosis?Hi I have a cal mag deficiency it appears? I gave her some calmag yesterday about a half liter (from a gallon/5ml dose) bc she's already wet. How long does it take to correct this? I also have been spraying the leaves. OR did i diagnose wrong?Leaves. Color - Dark-brown
4 years ago
2
Solved
handaman
Brown spots on tips of some leaves4 leaves affected on only one plant. All plants are receiving same feeding and are from same clones. Based on photo and googling it looks awfully lot like P deficiency? I'm still in vegetation phase though. I'm feeding with Advanced Hydroponics Grow + Bloom + Micro based on chartWeek 6
Leaves. Color - Dark-brown
4 years ago
2
Solved
HAPPY91
Leaf Help PleaseWhats with the discolor and clawing?Leaves. Curl down
Leaves. Color - Dark-brown
4 years ago
7
5
Solved
GoldenWeedGrower
leafs with brown spots and olders become yellow and curledI'm trying to figure out what is the problem with the growing of my plant.
The upper leafs are quite normal, even if they tend to bend downwards.
The old leafs start with brown spots and then they become yellow and curled on the peaks.
Please help me to understand what's going on4 years ago
1
Solved
KOKOK
Help my plantHey, i see something wrong with my plant, untill Day 10 she was under the cfl lamp n every thing was ok, at the Day 11 i switched the light to LEd and this happend:(
İ noticed when i compare the photos of the day 11 with Day 10, please help me im nervous, Thanks.
What you think?4 years ago
3
3
Solved
FrostyCloudzz
Hat irgendwer Haushalttips?
Kann ec und ph-wert nicht regulieren oder testen bitte um dringende HilfeLeaves. Curl down
Leaves. Dropping off
Leaves. Color - Dark-brown
4 years ago
4
3
Solved
Professor_Chaos
I have only been using CalMag at half strength.. I normally go full.. So I suspect its Cal def.... But never seen it this color.. Different strains can show differently tho.. Help! Just on the 2 remaining fan leaves.. Not spreading to branches... Yet.Week 4
Leaves. Color - Dark-brown
4 years ago
2
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.4 years ago
3
2
Solved
Grishka
Can you identify the issue?Leaves turning yellow and brown and curling at the tipsLeaves. Color - Yellow
Leaves. Color - Dark-brown
4 years ago
2
Solved
FrostyCloudzz
Hilfe was ist los ....Leaves. Curl down
Leaves. Color - Dark-brown
Leaves. Color - Mottling
4 years ago
2
2
Solved
bongriplarry
Brown spots, serrated edges curling up - calcium deficiency?This is a Barney's Critical Kush auto that's at about day 57. She's into flowering, but I've just started to notice some brown spots on leaves with some slight tip browning, and the serrated edges on the leaf are curling up.
Is this just a straight calcium deficiency?Leaves. Curl up
Leaves. Color - Dark-brown
4 years ago
1
3
Solved
GIPeN
Is this a problem?I have some old leaves with a reddish tint around the leaves, couldn't find any nutrient deficiency/excess that matches, maybe phosphorus?Leaves. Color - Dark-brown
4 years ago
3
3
Solved
Kripoulas
Deficiencies? Brown spots, yellowing and purple stemsWhat is this deficiency or maybe toxicity and whats the solution? She is fed with biobizz chart instructions but with every other watering. She is big so I'm guessing I should water with nutes every time? She showed this first week into flowering.4 years ago
3
3
Solved
N_e_O
Send HELP!I wonder if this yellow ton and even starting the orange should be from the strain of is getting burn? What can i do? reduce sun light? should i start feeding with veg suplement?Leaves. Color - Yellow
Leaves. Color - Dark-brown
4 years ago
1
1
Solved
Tomi589
Hojas marronesHola soy nuevo, quería saber cual es el motivo de estas hojas amarillas marrones que tengo . Soy novato es mi tercer cultivo , podría ser quizás sobrefertilizacion , falta de algún nutriente o algún bicho? Envio fotos de las hojas afectadas y la planta en general.Leaves. Color - Dark-brown
4 years ago
1
2