The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Strange yellow spots
blackcald
started grow question 6y ago
Strange yellow spots on top leaves, what am I doing wrong?
Solved
Week 3
Leaves. Color - Yellow
likes
TimTheTerpMan
answered grow question 6y ago
According to your log your pH is a bit high.. this can cause a lockout of iron which it looks like what its doing.. shoot between 6.0 and 6.5 if possible! Cheers and happy growing!
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
THC_Hazeman
Correcting some things
My buddy is showing some deficiencies, might also indicate not right pH values. Should I wait for the soil to completely dry before correcting the pH or should I flush right away? Also why does it take 4 days for the soil to dry? I always make sure she drains every time.
Leaves. Color - Yellow
3y ago
1
1
Solved
DibbyDab
Advise to flush or feed in Veg
Does this is look like a nute burn, deficiency, or ph problem? The two plants that are growing a tad taller have had yellowing tips some curling downward. Don’t want to overreact and cause it to worsen, they’re looking healthy otherwise. Any advise whether to flush or feed?
Leaves. Curl down
Leaves. Color - Yellow
1y ago
4
Solved
lucasurfer420
Yellow streak on leaf
Hi guys reaching almost week 3 in few days. Just saw this yellow streak on the edge on right leaf ? What could be ? Thanks guys.
Week 2
Leaves. Color - Yellow
6y ago
6
4
Solved
kush_dreams
Nute burn or something else?
My middle and top leaves are yellowing from the tip and edge inward, is this the nutrient burn or another issue altogether? Runoff PH was 5.9 and ppm was 700.
Week 13
Leaves. Tips - Burnt
Leaves. Color - Yellow
Feeding. Deficiences
6y ago
3
2
Solved
Nico6426883
I couldn't solve the problem, help
hello everyone auto amnesia haze's are in their 9th week. What is the problem with the leaves? Thank you for the answers.
Buds. Too few
Buds. Other
Leaves. Color - Yellow
2y ago
4
Solved
SilverSlapdick
Bottom leaves yellowing at beginning of flower
So my plants have been flowering for about a week now and the lower fan leaves are yellowing with brown spots. Should I be feeding them more of the flower girl I’m using or is this a deficiency of a specific nutrient? (following dr earth feeding schedule designed for cannabis)
Week 5
Leaves. Color - Yellow
4y ago
4
7
Solved
Madmike88
Is this the start of a nute or sun burn? Or am I just worrying too much.
Leaves. Color - Yellow
5y ago
2
2
Solved
Stunatic
Yellowing, wilting, stunted growth
Can anyone please help me identify whats wrong with them. I've done a flush, adjusted the lights, reduced the nutrient strength, I've pretty much done everything and still stunted growth and they are still looking weak and frail. I'm lost and I don't even know what's wrong.
Leaves. Curl down
Leaves. Color - Yellow
Leaves. Color - Pale
2y ago
1
5
Solved
AADGrow
Spots and leaves bending down, why ??
I notice some spots on the plant, can someone advise in what the problem is and how to resolve ?
Week 4
Leaves. Curl down
Leaves. Color - Yellow
4y ago
5
3
Solved
Stixere
Leaves
What can be wrong and what should I do?Biobizz fertilizers(Grow, Bloom, Topmax). 6 weeks.
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4y ago
2
Solved
Betagemini
Hi Guys I need some advice pleas to stop yellowing all the leafs on the plant. I started feeding her with 40ml of Biocanna Flores per 10l of water 3-4times per week and 2 weeks later a I added 100g of guano. Do you thing it is Potassium (K) defeciency? or it is toomuchPhosphorus?
Week 23
Leaves. Color - Yellow
6y ago
6
3
Solved
RRuffin
Blattprobleme bei Pflanze (Wahrscheinlicher Kalziummangel?)
Ich habe 2 Pflanzen in Zelt und eine der Pflanze zeigt ziemliche Mängel. Viele Blätter sind mittlerweile gelb mit braunen Flecken. Die andere Pflanze hat diese Mängel aber nicht, beide wurden gleich gegossen, etc. Ich habe vor ein paar Tagen DolomitKalk und Worm Casting benutzt.
Week 11
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
8mo ago
7
4
Solved
Sygnoman1987
Weak
Hi guys ! My first grow Please help me ! What could be wrong with my little ones? Soil: plagron royal mix Lamp: lumatek 465 pro compact Water: 6.5ph/Ec 0.7 Nutrients: plagron power roots 3rd week now. Thanks for the answers !
Leaves. Color - Yellow
Plant. Stem - Weak
5y ago
3
2
Solved
Wscook07
Yellow/Brown leaves
I've got some brown/ yellowing leaves scattered around the plant. Growing in hydro, about 3 1/2 weeks old. Thanks in advance for any help.
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
3
4
Solved
GreenEyez
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!
Week 9
Leaves. Color - Yellow
4y ago
3
6
Solved
WeedWhisperer
Yellow leaves and plant is struggling
Hi people. I need some help with my friends plant please. Not sure why this plant is struggling so much. Getting about 2.5-3 liter water every 3 days. Under watering is my suggestion. Grown in natural soil.
Leaves. Color - Yellow
5y ago
3
3
Solved
MindFlowers68
Thoughts on leaf symptoms? The other plant in tent is doing same thing,but plant in other tent getting similar feed not. see diaries for more pictures
K deficiency? Hard to believe that can happen in 65-gallon pots.Are getting big though.New growth tips looked yellow,hit them with water-soluble K and the new growth edges seemed get green.Some toco-ing, humidity is kinda high. Too intense light(800 ppfd), not enough C02 maybe?
Week 11
Leaves. Edges burnt
Leaves. Color - Yellow
1y ago
1
3
Solved
deanondeanon
Leaves
Any idea what this could be?
Leaves. Color - Yellow
6y ago
2
3
Solved
Magic43562
Dying leaves
I had some mild nute burn last week on a few plants. A few tips were burnt. Some lower leaves are turning yellow and dying. Is this still nute burn or something else?
Leaves. Edges burnt
Leaves. Color - Yellow
6y ago
1
1
Solved
bobo66
yellow spots on upper leaves, towards the end of flowering, I grow in a Coco ,flowering 8/10
This is my second attempt at cocus I work with Plagron nutrient solutions(Coco Nutrient) I follow the table, there were no problems on my first try.. should i stop nutrients? I always mix the water in a bucket, so I can't spoil it either, because most of the plants are healthy, ph 5.5 is always between 5-7!
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Mottling
3y ago
6
7