The Grow Awards 2026 🏆 
Leaf Deficiency
buddhi_coopstarted grow question 4y ago
What’s going on with my leaves? Looks like the start of a deficiency.
Solved
Leaves. Curl up
Leaves. Color - Yellow
Feeding. Deficiences
likes
MrNObody_Growsanswered grow question 4y ago
Looks like a cal/mag issue starting up or PH is imbalanced causing a lock up.
Similar Grow Questions
Solved
7even
Outdoor northern lights auto yellowing earlyWith 3-4 weeks of flowering still to go, how worried should I be about rapid yellowing? I have kept feeding, i know she is rootbound and I havent checked pH. Do some plants just yellow earlier in flowering or should I act?Week 11
Leaves. Color - Yellow
3y ago
1
1
Solved
anacleto
Nutrient deficiencyWhat kind of deficiency these leaves are showing? Can this be lack of nitrogen? I am using a lower amount of BioBizz Grow these days (1ml/L), passing to BioBizz Bloom and Top Max as they are in the middle of the flowering stage. In case, should I integrate with more BioBizz Grow?Week 6
Leaves. Color - Yellow
6y ago
3
3
Solved
TheFaeCat
Identifying the cause of stressDoes anyone know what I’m seeing with the leaves in these photos? The closest I’ve been able to guess from online resources is maybe sulfur deficiency, but to my eye it doesn’t seem to quite fit any of the broad categories. Perhaps just general under-fertilization?Week 7
Leaves. Color - Yellow
3y ago
2
1
Solved
TripleCcannabis
Deficiency identificationWhat deficiency is this? Thank you in advanceFeeding. Deficiences
6y ago
2
Solved
Ledros
Yellow tips on newer leaves. Nutrient burn or something else?I have noticed yellowing on the tips of newer leaves that seems to be slowly getting bigger. Nothing on older leaves. Start of Nutrient burn? I also have noticed some yellow/brown spotting on older leaves but that may be related to earlier PH flux that has since been fixed. TIA!Week 5
Leaves. Color - Yellow
6y ago
7
Solved
Eagers
Nitrogen Deficiency?Think I might have a Nitrogen Deficiency but just wanted to check and confirm with some of you? Leaves are slightly pale and yellow across the plant. I checked runoff Ph last week and it was 6.1 realised it can lockout some calcium so flushed with 6.7. ThanksLeaves. Color - Yellow
6y ago
1
3
Solved
Manijuana
Any ideas on what's causing my baby to yellow at the top? I think too much heat personally as ive been at a temp of 81. Root system is doing great! Any thoughts are welcome!Leaves. Tips - Die
Leaves. Curl up
Leaves. Color - Yellow
4y ago
3
2
Solved
Laxguy420
What can I crank my nutrients up to in this stage and hat scheduleI am currently running low level nutrients and want to know if I can amp up any specific N or K or both right now in veg and push the plants. What can I change my nutrients/feeding schedule to in order to give the girls a boost?Week 4
Feeding. Deficiences
4y ago
3
3
Solved
GooglieBear
Yellow spotting with some holesNew colas that are breaking through to the canopy have some yellow spotting on the leaves and some of the spots have holes. What is this?
-Ph on run off is good.
-Plant got some nute burn 4 days ago but I reduced the feed.
-This is 4 days after LST and lights brought closerWeek 4
Leaves. Color - Yellow
5y ago
2
2
Solved
Aussiegreenthumb82
Yellow centre veins fan leavesYellowing of the inner vein of fan leaves only. Also sporadic yellowing and blemishes of whole fan leaves but only some, others fine nice and green. All bud leaves and buds don't appear affected. Is it just that she's nearing the end of her life cycle? Or over water/over nute?3y ago
2
3
Solved
Shockolateman08
Nitrogen overdoseNow my experiment turned into a mutant 😂...I wanted a problem and I got it 😔 I flushed and flushed....and flushed. Now what? Bloombuster said it was an nitrogen overdose, what now?Leaves. Veins - stay green
Feeding. Deficiences
Techniques. LST
5y ago
3
5
Solved
KushManF
Yellowing and wilting of leavesHi Growers. My leaves are currently looking like this. I wanted to ask for some help or guidance as to what May have caused them to change colour like thisLeaves. Edges burnt
Leaves. Color - Yellow
Leaves. Other
4y ago
2
2
Solved
GrowmieDeLaStreet
Maintaining the soil pHI give pH'ed water, never more than 800ppm and I still always end up with lockouts. I used to not give water untill runoff but now I do. What to do after testing the runoff? It's currently at 6.0 even after a flush with 7.2. Ask many questions I need to know what I'm doing wrong.Other. General questions
Setup. Substrates
Feeding. Deficiences
4y ago
1