Vote Now 🏆 for the Grow Awards 2025!

Chat

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

Recommended

Grow QuestionsIs this fungus infection or calcium deficiency?

Is this fungus infection or calcium deficiency?

docpaycestarted grow question 8 months ago

Plant seems fine overall but shows brown spots on some leaves (new and old). Week 4 bloom in soil. 3l rain water pH adapted + CalMag to 250 µS/cm. Crazy Hills fert. twice a week (EC 1600 µS/cm). Water pH 5.0, drain pH 7.4, drain EC 1400 ... 1500 µS/cm.

docpayce

docpayce

docpayce

Solved

Leaves. Color - Dark-brown

likes

Grandmas_Boyanswered grow question 8 months ago

Looks like a deficiency to me. Double check your temps and humidity to be sure, but I'm thinking that's not fungus.

2 likes

Complain

Selected By The Grower

Similar Grow Questions

Solved

Nutrient burn? Deficiency?Moby Dick Auto, getting closer to harvest but not there yet. Getting nitrogen abundance? Not to sure how to read this. She's just been sitting in the quite hot sun all day but sche has before, might have overfed bit using biobizz (not noticeably different doses thant usual)...

Leaves. Color - Dark-brown

6 months ago

1

1

Solved

Weed doctors to the rescue Day 44, fb auto, my happy girl developed those dark spots at the top... Is this a Calmag deficiency? Although I'm giving her calmag every feeding. I think there are also first burnt tips. I'm about to water her tonight, what should or should not give her? Thanks for your inputs🙏

Leaves. Tips - Burnt

Leaves. Color - Dark-brown

Leaves. Color - Black or grey

6 months ago

3

5

Solved

Nitrogen Deficiency or Nutrient Lockout?My plants are showing red / purple stems as well as some rust spots in some of the older leaves. Nitrogen deficiency? Or lockout due to too much fertilizer?

Leaves. Color - Pale

Leaves. Color - Dark-brown

6 months ago

3

3

Solved

Cal-Mag Def?Hi People! So I found those Spots on my Leafs...They are also very dry . Is this a Cal-Mag Deficiency? Week 4 of Veg is about to begin and I was planning to send them to Flower in about 10 Days. Any recommendations on how to manage this properly?

Leaves. Color - Dark-brown

Other. General questions

5 months ago

2

Solved

Is this Okay ? Leaves from buds tuning Black/purple. I have pH around 6,7. Strain Is apricot by Fast buds And it shouldnt be black. I am using full biobizz nutrients by shedule

Leaves. Color - Dark-purple

Leaves. Color - Dark-brown

Leaves. Other

5 months ago

3

3

Solved

Leafseptoria, ore something else!?Is this Leaf-Septoria? Had the small spots since a few days (looks like they don´t get really bigger) but some leafs start to die like picture 2. looks to me a bit like calcium-deficit, or i´m i wrong?

Leaves. Color - Dark-brown

Leaves. Color - Mottling

5 months ago

4

4

Solved

Nutrient Deficiency What Deficiency’s are these ?? Using Coco+Perlite with earthworm castings and feeding with Fox Farm Nutes following the feeding schedule with CalMag every time I water at 6.2-6.5ph every other day. 1000ml of water per plant. All four clones have been fed the same since I got them

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5 months ago

4

Solved

Problem New Problem . How Can i fix this?

Leaves. Color - Dark-brown

5 months ago

3

3

Solved

Handel es sich um Kalzium oder magnesium mangel oder ist das ein Pilz Es handelt sich um Skywalker von dutch passion ist jetzt in der 3,5 Woche in der Blüte gedüngt wurde sie mit green house feeding grow zum Anfang und nach der zeit Umstellung habe ich bio bloom gedüngt nach Hersteller angaben erde von plagroon braune flecken seit 2Tagen überall

Leaves. Color - Dark-brown

5 months ago

1

Solved

Help Got two ladies having some problems, all get the same food but only this two have show some problem. Fedding with Advanced Nutrients pH perfect PH 6.3-6.5 eC ~800

Leaves. Color - Dark-brown

5 months ago

1

1

Solved

Why are the leaves tips curling dying and brown marks appearing?My Mac #1 showing brown spots/marks on leaves, with tips curling and dying yellow/brown - what is the problem? How do I fix this? She is in week 5 flower. Is it calcium deficiency? pH problem?

Leaves. Tips - Burnt

Leaves. Tips - Die

Leaves. Color - Dark-brown

5 months ago

2

1

Solved

Hello everyone, sorry to disturb but can anyone please help me identify what's wrong with my plants. I've included pictures, and if you need anymore details I am more than willing to share.

Leaves. Edges burnt

Leaves. Dropping off

Leaves. Color - Dark-brown

7 months ago

3

5

Solved

Gorilla_cookies92

Help! is this calcium deficiency?Help! is this calcium deficiency?

Leaves. Color - Dark-brown

6 months ago

2

Solved

Brown Leafs?What is going on here? i saw that my plant got some issues with its leaves. I got my self Bio Bloom from bio bizz my friend told me it could help but it is already day 3 and it did not get better. what should i do?

Leaves. Color - Dark-brown

Techniques. Defoliation

6 months ago

1

4

Solved

Smoking_Joe_Frasier

Nutrition deficiency or nute solution on leaves during watering?Hi Growmies,during my monitoring routine I found some brown spots on the leaves. Not many but on some leaves the brown spots have become transparent and I can see through the leaves. Any ideas what could have caused the brown spots? Perhaps not enough CalMag? Rest looks healthy.

Leaves. Color - Dark-brown

6 months ago

4

3

Solved

I have noticed brown spots on a leafes, what is it ? overdose ?

Leaves. Color - Dark-brown

2 months ago

3

5

Solved

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 😐

Leaves. Color - Dark-purple

Leaves. Color - Dark-brown

2 months ago

6

6

Solved

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

2 months ago

6

8

Solved

yoinky_sploinky

Brown/yellow/purple leaves in This 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 happening

Leaves. Color - Yellow

Leaves. Color - Dark-purple

Leaves. Color - Dark-brown

2 months ago

2

2

Solved

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 Help

Leaves. Edges burnt

Leaves. Color - Dark-brown

Leaves. Color - Black or grey

2 months ago

9

6