The Grow Awards 2026 🏆 
Phosphorus deficiency?
GemansGoGreenstarted grow question 2y ago
Phosphorus deficiency?
Open
Leaves. Curl down
Leaves. Color - Dark-brown
Leaves. Color - Mottling
likes
Answer
Similar Grow Questions
Solved
Sterious
moistureI have a humidity problem. It's usually between 75 and 70. I want to buy moisture resistant seeds from the region I live in and I am thinking about what I should not do to overcome this problem. I started the new 2nd wind blower, hopefully it will be enough.This is my first prodBuds. Other
Leaves. Color - Mottling
2y ago
5
3
Solved
Eddjack
Deficiency?Non riesco a capire se è una carenza o una bruciatura da luce, secondo voi? Cosa potrebbe essere ? Appare soprattutto sulle foglie a ventaglio....Leaves. Edges burnt
Leaves. Color - Dark-brown
Plant. Stem - Red or purple
5y ago
2
2
Solved
Chief_Leaf
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
1y ago
2
1
Solved
elevensixty6
Spotting issue consistent in all my grows. Have always thought Cal deficient but more Cal never fixes the issue. PH always checked with 2 PH pens 6.2-6.8.Always pops up around the same time in flower.. week 4/5. Brown irregular spots and occasional curling down on the fan leaves. The only things I have consistently used in all the grows is the LED light, RO water, and CALiMAGic. Switched to dry organics but now its back. N toxic?3y ago
7
6
Solved
gdogfunk
Day 67: after watering, I am noticing the leaves curling under, but fine next morning - or at least less clawing. Does this look like over watering? Watering every other day 1/gal per 7gal fabric pot with 2/3 soil, 1/3 perlite well mixed. If not, what might cause the claws?Week 10
Leaves. Curl down
7y ago
2
2
Solved
Troy_McClure
soil ph is erratic
fox farm ocean forest : pro-mix (3:1) - ph 6.3-6.8
run-off ph: plant 2: 4-6 plant 1: 5-6.8
watering / feed ph: 6.3-6.45
soil ph after water /feed: 5-7
soil ph when dry: 7.5-8
both plants treated 100% the same
phosphorus deficiency / ph imbalance help please6y ago
4
3
Solved
XelpGrows
Seedlings - Over-watering?Hello all, I just started my first grow. I was thinking I may have exposed the seedlings to excess humidity (90% in cloning chamber)causing the cotyledon to curl down on one side. Wanted to get some feedback if my assumption is correct as the soil looks and feels quite dry.Leaves. Curl down
4y ago
1
1
Solved
burnerac
I’m seeing brown on the lower leaves. They also appear particularly shiny like a magnolia leaf. Is this too much iron or magnesium?Week 7
Leaves. Color - Dark-brown
6y ago
3
3
Solved
Whatwentwrong
Marks on leavesHave a drying and brown marks on lower leaves but can’t match it to any online photosWeek 8
Leaves. Color - Mottling
5y ago
2
3
Solved
Skylife
Brown dots on leafsJust checked on my girls, and noticed this slight brown mark on 2 leafs... what is this?Leaves. Color - Dark-brown
Other. General questions
6y ago
4
Solved
Chucky324
Hello. When I watered 3 days ago, I saw some brown spots on the lower leaves and thought I had got some nutrient solution on the leaves but now it's on the next set too. Any idea what is going on? All 3 plants are being treated the same. Thanks Chuck.Week 3
Leaves. Color - Mottling
3y ago
4
Solved
AlienScrOG
leaf !?... no real problem.. is it a stress due to excessive handling of fertilizers or the breaking of the field in stops and leaves for training?good morning guys I noticed some burnt leaves I don't understand if it was a slight lowering of the level of the dwc ..because I noticed some slightly dry upper roots then I increased the level and after the roots improved ... I don't understand if that machine is due to stress o4y ago
2