Vote Now 🏆 for 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
Leaf spots urgent
Robownz_53started grow question 3 years ago
I can’t seem to identify this issue I think it’s a calcium deficiency or a phosphorus one?
Open
Leaves. Color - Dark-brown
likes
Answer
ojetepelonanswered grow question 3 years ago
An excess in N can produce a less uptake of calcium I think you have a little N excess so give less N add some calmag and see how is going.
You can check the PH of the drainage to know if you've an acid medium wich slows the Ca and Mg uptake.
have a nice day friend.
2 likes
Complain
Similar Grow Questions
Solved
bfcuk
I have noticed brown spots on a leafes, what is it ? overdose ?Leaves. Color - Dark-brown
2 months ago
3
5
Solved
tangie
Dark purple areas on leaves — genes or environment/feeding problem?What the heck is this? Is it just purple genes or a stress/deficiency or a combination of multiple factors?
I have checked three visual cannabis plant health guides, and did not find a single issue which looks like this. Maybe a combination of 2 factors, but I'm not convinced 😐2 months ago
6
6
Solved
JSanchezz
could this be due to the PH being too low?I watered 3 days ago with PH 6.3 Ruoff was 6.0
today watered with PH 6.6 runoff was 6.1
Can the brown spots come from the wrong PH ?
fertilizer is full BIO BIZZ CHEEMA, worm humus and mycoriza
what would you recommend to do ?Leaves. Color - Dark-brown
a month ago
6
8
Solved
tangie
Yellow & brown spots in 2nd and 3rd week in coco-perlite nursery cup. What am I doing wrong? Fed until 20% runoff (extra), strained. Smth with roots?2nd grow in 70/30 coco-perlite mix* & very similar issues w. yellow/brown spots in weeks 2-3, then stabilizes.
*CalMag & pH buffered 6h @ 0.5mS, pH5.8, strained** & seed planted.
Feed:
W1: **Strained sol. + water 70/30, pH5.8
W2: AN M+G+B 1-1-1 + Simplex CalMag Plus 0.4mS
Helpa month ago
9
6
Solved
BoboLacetti
help in Hydro RDWC/DWCHello, my plants are now about 4 weeks old. The leaves droop and curl. The spots on the leaves are increasing. Is the PPM value too high? It's 1000ppm tds
They grow in an RDWC system with top feed. The top feed is permanently switched on. Can that lead to problems?Leaves. Curl down
Leaves. Color - Dark-brown
Roots. Color - Brown
a month ago
1
2
Solved
yoinky_sploinky
Brown/yellow/purple leaves inThis started out as brown spots on big fan leaves and has turned into what you see on the pictures. I've been ignoring the discoloration until I was greeted by some wilted, dead leaves on plant #2 today.
I'm not worried at this point, just really want to know what's happeninga month ago
2
2
Solved
krewgrew
Spots on leaves, dying leaves, afraid of bud rot later. Last grow same plant-similar problems in the end bud rot. SleepyJoe Strain.I was advised 10 days ago that my plant was overfed.
Since then it has only been getting 6.5 water and unfortunately new problems are starting to appear.
100% organic soil
biobizz fertilizer, using the manufacturer's recommended "all-mix".
Their environment is consistently perfecLeaves. Tips - Burnt
Leaves. Tips - Die
Leaves. Color - Dark-brown
22 days ago
6
3
Solved
JeyGanesha
Macchie di ruggineEcco adesso si vedono le foto. Growers ho trovato delle macchie di ruggine su 2 foglie della Apple strudel.da cosa dipende??Leaves. Color - Dark-brown
3 months ago
2
Solved
tipsytapsy
Bud rot? Mold?My plant is a bit problematic ("quick one" Auto from RQS, outdoor balcony grow).
I'm a bit worried that I have to throw it out, therefore I would like to ask for your expert opinion. :)
1. Is the "brown stuff" on the top bud "bud-rot"?
2. Are the "more intense white spots" mold?Buds. Other
Leaves. Color - Dark-brown
3 months ago
2
2
Solved
SmokinTees420
Browning leavesMy leaves are showing some brown spots 5 days post transplant. I also increased my light from 30% intensity to 80% intensity. I have them 18” away currently. Am I showing signs of light burn? I have since turned the light back down to 50% and I am not on a 18/6 cycleWeek 1
Leaves. Color - Dark-brown
3 months ago
5
6
Solved
Strombelete
Brown Spots on Leafs, veg and flowering, CalMag Def or overfert?Hi,
I have been running 2 Sensi Skunk Autos and 2 Sensi Tang Sugar with 43 days. Soil is All Mix and Nutes from the BioBizz line.
9l pots and watering every 2-3 day with 1l water. Ferts every watering like this: 1l - 1,0ml BioGro/1,8 BBloom/2,0 ActiVera/1,0 Top Max/1,0 CalMag
ThxLeaves. Color - Dark-brown
3 months ago
3
1
Solved
Auggie
Tropicana cookies purple(RQS)Do u guys think she will make it out ? I have done everything. I over fed it during the veg .Is Autoflower N she is in 75 flower from RQS. Tropicana cookies purple .will the THC downgrade or the taste ?Leaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
3 months ago
1
Solved
weefi
Brown parts on more and more leafesI see more and more brown parts on the leafs of Sour Diesel (only) any idea what the issue might be? For reference see also my pictures of SD.
First idea:
Added 1 liter banana extract(to get Potassium) added 2 liter water and 2,5 ml CalMag.3 months ago
6
3
Solved
dabestgrowing420
Brown spots on leavesHi, some white widow auto leaves have these brown spots and some burned edges and tips. What deficiency or toxicity is this? Growing organic, using biobizz nutes.Leaves. Edges burnt
Leaves. Color - Dark-brown
3 months ago
1
Solved
Alpha_Green
…a few dark small spots or dots at the tips of the leavesHello dear congregation! Maybe some of you know what the following leaf symptom can mean:
Very few leaves have a few dark small spots or dots at the tips of the leaves. Plant looks vital.
Plant is in bloom.
Thank you 🙏Week 9
Leaves. Color - Dark-brown
2 months ago
3
2