The Grow Awards 2026 🏆

Back to Grow Questions

Marks on leaves

Floristasstarted grow question 5y ago

Bright marks on leaves, what is this? what could be the reason of this?

Floristas

Floristas

Solved

Leaves. Color - Yellow

likes

WestIndiessanswered grow question 5y ago

To much nutrients dude. Water them with only water then start feeding and you will be fixed.

1 like

Complain

Selected By The Grower

Similar Grow Questions

Solved

Growing_Spartan

Anyone know what this is?Hey so I have this auto flowering at the moment and I came back after a few days to see the buds are getting yellow tips and are pointing upwards, not quite sure what type of deficiency I’m dealing with but if you know would you kindly direct me in the right direction to fix it?

Leaves. Curl up

Leaves. Color - Yellow

1y ago

1

3

Solved

Leaf damage/discolouration The Skunk has been getting a lot of leaf issues. I have been trying to stay on top of picking them off as they appear in case it's rust or similar and can spread. It almost looks like cal mag deficiency, but I'm feeding cal mag each feed. This is the only one effected out of four

Leaves. Color - Yellow

Leaves. Color - Dark-brown

6y ago

2

2

Solved

CalMag?Please Help: Is this CalMag deficiency? Age: 21 days Transplant into this pot: 4 days ago Watered in with 1/4 of the recommended feeding + 0.25 ml CalMag per Liter (each plant got 3 liters). PH: checked the substrate: 6.5 watered/fed with 6.3 PH First feed at 14 days

Leaves. Color - Yellow

3mo ago

3

3

Solved

Week 2: One of the plants still doesn't look good + other beginner questions :)Second week and one of the plants has weird spots + leaves curled. Not sure what to do. Do I overwater? Is it some kind of disease or deficiency? No idea. Also, when should I start feeding the plants? And how much water do I need at this point? 😥

Leaves. Curl up

Leaves. Color - Yellow

Leaves. Color - Mottling

2y ago

6

6

Solved

What is this deficiency?They started off with some brown spots and progressed. Is this phosphorus? I have been feeding with .5-1ml of dyna grow bloom and 2ml of cal mag per gallon watering at about 6.3-4 ph. But i recalibrated my ph pen and did one water since.

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

4

4

Solved

Magnesium deficiency?Does this look like magnesium deficiency?

Leaves. Color - Yellow

5y ago

2

2

Solved

Yellowing Leaves in Flowering week 4 is it normal yellowing leaves in this stage ? or its phosphorus def? also some of the tips burned

Leaves. Tips - Burnt

Leaves. Color - Yellow

Plant. Stem - Red or purple

4y ago

4

5

Solved

overnight yellow leaves with brown spots These leaves (about halfway up on #1) turned yellow with brown spots overnight. I didn't check the soil before giving it nutrients two nights ago so I was wondering if it has to do with overfeeding. The soil is damp and kinda packed together. Any idea what's going on?

Leaves. Color - Yellow

5y ago

2

4

Solved

Leaf discoloration - light and dark splotches Hello! Any ideas as to why my leaves have splotches of discoloration? 😅 It appears that one leaf has light 💀 patches while the other leaf has dark. 👹 Thanks for your time! 🙌

Leaves. Color - Yellow

Leaves. Color - Black or grey

6y ago

2

3

Solved

Brown spots on lower leaves - ph fluctuations?I have discovered some brown spots on the lower leaves. I suspect it might be down to ph fluctuations - first time growing DWC so probably my bad! Does anyone agree? I should also add - I did a nutrient change a few days ago and for the first time added calmag & silicon

Leaves. Color - Yellow

5y ago

1

3

Solved

Should I trim yellow fan leaves?would anyone bother trimming off the yellow fan leaves or just leave them? I have no issues with space or airflow - plus I kinda like the colours they have right now as they are getting near harvest time

Leaves. Color - Yellow

3y ago

3

3

Solved

Dry yellow and brown leaves All plants get same nutris and water, what is the problem with some of them? Need help 600ppfd 69 f 55-60 humi Ec 1,2 plagron grow + root power

Leaves. Color - Yellow

Leaves. Color - Dark-brown

1y ago

3

Solved

Looks like a defficiency. But how?Hi, I'm puzzled by this plant's behavior. It's being treated in the same way as others. And yet it's stunted and looks unhealthy. Can you please help identify, what's happening? All the info is in the diary. 1st photo is the plant I'm talking about, the other two it's sisters.

Leaves. Color - Yellow

1mo ago

5

Solved

Yellow and Brown Spots on top leaves Hi everyone I need a little help with my blackberry auto she's starting to show yellow and brown spots on top leaves near buds .. its day 61 (24 f) .. from what I've read online its calcium or manganese deficiency but I'm not so sure . Any advice is well appreciated!

Leaves. Color - Yellow

6y ago

5

4

Solved

Yellow leaves Got a few dead/yellow leaves at the bottom. Is this normal at 8 weeks?

Leaves. Color - Yellow

5y ago

1

1

Solved

ObserverInterest

Is this nute or sun burn? What should I do to save my babies ?I upped the nutrients to week 2 of veg state (biobizz) and put the light to 50% intensity. I put the light at 6 inches above recommended height (which is recommended on the Mars Hydro website for beginners). . IS THIS NUTE BURN OR LIGHT BURN?

Leaves. Curl up

Leaves. Color - Yellow

2y ago

7

4

Solved

Do I have an Iron Deficiency, if so How do I increase Iron levels (Already using Calmag)I think I have an iron deficiency. New Growth is appearing yellow. HYDRO Rain water - (20ppm) PPM 750-900 (just upped) Canna Aqua A+B Calmag (0.35ml/L) PH was 6.2 (as there was a calcium deficiency so I raised it slightly) PH is now 5.8 (I read lower PH is better for Iron Intake

Leaves. Color - Yellow

5y ago

1

Solved

Yellow leaf I’m 6 weeks into a 7-8 (suggested) flowering stage. Some of the lower leaves have gone yellow. Is this signs of the plant ending it’s run or something to be worried about?

Leaves. Color - Yellow

5y ago

2

3

Solved

ColonelForbin1990

4 days without water I had to leave for 4 days this past week. Gave both plants H2O before leaving but I came back and one of my plants has some ugly yellow and brown leaves. Do I need to do anything to correct this or just get back to my routine feedings?

Leaves. Color - Yellow

Feeding. Other

4y ago

2

6

Solved

Bushman_Genetika

Seedling advice Hi, my light was at 60cm with an average humidity of 70 degrees Celsius. There’s slight dryness around the tips, yellowing, crispness. Remedy thus far: I moved the light up to about 75 cm, it’s a 100W led. Humidity also dropped to about 60 degrees. Any advice to remedy?

Leaves. Color - Yellow

6y ago

5

4