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

Back to Grow Questions

Calmag Deficiency? Yellow Spots

dusterpstarted grow question 4y ago

Last res change I saw some yellow/brown spots on the fan leaves up where the main cola was getting too close to the light. Is this a calmag deficiency or light too close? I moved the light up to the top of my tent with zip ties and got back several needed inches. See pics.

dusterp

dusterp

Solved

Leaves. Color - Yellow

likes

DoDrugs420answered grow question 4y ago

Looks more like calmag but if its starting at the bottom leaves then you should consider a lack of potassium, when its at the upper section that's when its calmag. Stay lit growmie, doesnt look like light burn.

1 like

Complain

Selected By The Grower

dusterpanswered grow question 4y ago

How much more calmag should I add?

likes

Complain

smoke24answered grow question 4y ago

Moving the light was a good call. In flower with that light, you want to be around 18 inches plus or minus a few. You can also try feeding at a ph of 5.9 for a few waterings. Happy growing.

1 like

Complain

Similar Grow Questions

Solved

Yellow leaves midflower Please can someone tell me whats going wrong with my Royal Gorilla Auto shes at midflower yet most of her leaves are yellowing and drooping?

Leaves. Color - Yellow

5y ago

3

3

Solved

Yellow leaves black tips What’s happening with this plant? After watering all my plants 2 days ago, one of them has been quite droopy and developed these yellow areas with dark tips. Is it a watering issue / heat / deficiency? Thank you

Leaves. Tips - Burnt

Leaves. Color - Yellow

5y ago

3

2

Solved

Yellow leaves at the bottom of the plant Hello growers! I wanted to ask if the lower leaves turning yellow and dropping is normal? 2 leaves are down and I know that's a normal behavior but another one is turning yellow and I just wanted to check if this is normal.

Leaves. Color - Yellow

4y ago

5

3

Solved

P deficient?I think this might be P deficient, want to get some other opinions. I was getting crispy yesterday but the change has been very rapid and today it is showing up brown with purple and crispy. should be cutting down in the next few days.

Leaves. Color - Yellow

5y ago

3

3

Solved

Yellowing fan leaves - How to prevent?🍂 Any suggestions on what to do with my yellowing most lowest fan leaves? My displayed nutrient plan is up to date and many pictures from past weeks to display the yellowing process (mid section of the plant). 🍂 I aim to water with pHd water of ~6,0-6,5pH. All help appreciated!

Leaves. Color - Yellow

3y ago

3

6

Solved

Light green leaves and more This just snuck up on my - don’t ask me how. To me it looks kinda like late stage something... what is it and what do I do? The colour is lime, stem is purple (but it’s been like that for the entire flowering period) and there’s some brown colour too.

Leaves. Color - Yellow

5y ago

2

3

Solved

What’s wrong Is there a problem with something? It seems to be yellowing and not growing very much. Soil under is still moist.

Leaves. Color - Yellow

Leaves. Color - Pale

5y ago

9

3

Solved

Seedlings going yellow Could yellowing of leaves on seedlings be from too much fertilizer ( liquid fish, compost,seaweed type.) I wouldn't suspect iron deficiency as it is new premium potting mix that they are planted in. I did feed with about half strength liquid feet about 5 days ago.

Leaves. Color - Yellow

5y ago

2

Solved

yellow leafs Guys what you think this might be? Flowering week 5

Leaves. Color - Yellow

5y ago

1

1

Solved

Issues with leaves. Day 90 total, 30 of flower. Leaves have been getting more and more yellow the past week, with progressively more brown tips.Vpd has been pretty close to ideal, the pot had 1 gallon less soil so could be missing out on some nutrients? Possibly Potassium? Otherwise not sure what it could be. Does not appear to be N deficiency because the leaves are affected from the top too. What should I do to fix this

Leaves. Tips - Burnt

Leaves. Curl up

Leaves. Color - Yellow

2y ago

1

3

Solved

Pale and patchy seedlings?What’s wrong with my seedling? Pale and white patches. 2 days from germ in coco, been feeding 1ml canna a&b per litre. Then gave cal mag only but no improvement. 2 other seedlings are ok but diff strains.

Leaves. Color - Yellow

Leaves. Color - Pale

5y ago

2

2

Solved

Burned leaves.Is this heat stress or nutrition related

Leaves. Edges burnt

Leaves. Curl up

Leaves. Color - Yellow

1y ago

7

6

Solved

Flush or what to do ?Advice please. I watered yesterday but the stains on the leaves are getting worse. Now I don't know if it is deficiency of cal n mag due to nutritient lock out which might be due to ph being off as I have 5 reders and all of them show a different thing. 🤦‍♀️...or it is it rust?

Leaves. Tips - Burnt

Leaves. Color - Yellow

Leaves. Color - Dark-brown

2y ago

1

1

Solved

Leaves problem What’s wrong? Leaves are too light green. It’s day 17 from seed. I use TERRA seed mix 12-14-24 and for fist 14 days only water.. the soil is effective too wet. Maybe is over feeding (water).. ore seem like an excess/deficiency of something.. please help me

Leaves. Color - Yellow

3y ago

4

Solved

Anxious_Passenger

I have tried to figure out what this could be without much luck... it seems that my leaves are having a slightly yellow tint to them under the grow light. Under normal light it seems ok, what could this be? Overwatering I am guessing but not sure.. Any help would be appreciated

Leaves. Color - Yellow

6y ago

1

Solved

Yellow leaves?Any thoughts on the yellow leaves? Maybe nitrogen deficiency?

Leaves. Color - Yellow

5y ago

2

Solved

Papi_Chulo_Germany

What's wrong with my little girls?Hey Growbros. I make it my first time. My young plants 24 days , get brown/yellow spots on there leaves and start to be lost the colour. My question is: what I do wrong? And, what I can do now? There will be die? 😢 Sorry for my bad English 🙈😅😅

Leaves. Color - Yellow

1y ago

3

3

Solved

Light tops after dark growth (but not clawing)Tops are coming in a bit light on this girl - what gives? I did recently bump up the light intensity a bit but nothing major. Nothing has been amended into the medium in 3 weeks or so to let her fill out the new pot and because she was pretty dark so I didn’t want N-tox. pH 6.5

Leaves. Color - Yellow

2y ago

2

3

Solved

Hi, Yellowing only on one leaf. It was fine 2 hours ago. She is on the balcony during the day and sees direct sunlight. What is happening? What should I do?

Leaves. Color - Yellow

5y ago

1

2

Solved

Yellowing on lower leaves. Any idea what this is?Don't think they should be deficient in anything yet, they're in new Ocean Forest soil and only on day 11 of veg, no way they used up what's in the soil yet. More details in my grow diary comment.

Leaves. Color - Yellow

4y ago

2

1