The Grow Awards 2026 🏆 
Deficiency help
SSFito173started grow question 5y ago
First week of flower and this starts happening. I flushed with 1 gallon r/o water hopefully it doesn’t continue. Anyone knows what deficiency is this?
Open
Leaves. Color - Dark-brown
likes
Answer
Experimentgreenanswered grow question 5y ago
It look like light burn or a micro nutrient deficiency (magnesium, copper etc).
If your lights are the proper distance and your feeding the plants a well rounded diet, then i would double check your ph pen is accurate. Recalibrate it if possible. You may be having ph swings too low or too high.
Happy growing. ✌️
likes
Complain
DeadStreamOrganicsanswered grow question 5y ago
It looks like it could be magnesium deficiency
likes
Complain
Similar Grow Questions
Solved
telez00m
Curled leaves and brown spotsPlease help! My Acapulco Gold suddenly showed leaf symptoms today. Shouldnt be a lock out, I always water with drain and use lower doses than the BioBizz chart recommends. Used Molasses two days ago, could that be the cause? Its the only plant that shows this signs.2y ago
1
Solved
Vitora
Yellow leaves - moby dickThe olders leaves started to die and to turn this yellow-brown color.
I thought it could be the temperature (I am about to receive my temperature hydrometer to measure that), or over/less watering, or nutrients.
The plant looked great a week before.Week 4
Leaves. Color - Dark-brown
5y ago
2
3
Solved
ObserverInterest
What is causing this Leaf discolouration overnight after a lot of tent work yesterdaySpent a lot of time in the tent yesterday. Everything was fine and this morning there’s bad discolouration on the leaves of some plants.
I did lower the plant (was way too high) so may beight burn - but it’s only on some plants
I did make two mixes of water/nutesWeek 8
Leaves. Color - Dark-brown
2y ago
4
2
Solved
Bikoo
My leafs have small damage, some holes, some brown, so silver? What do you dude and dudes think it is, do i need to worry? Even the newer leafs have some damage, Cheers!Leaves. Color - Dark-brown
Leaves. Other
5y ago
1
1
Solved
Granddaddy_Terp
Brown spotting?Hey everyone!
My plant is in her 5th week and a few days ago (around day 30) I noticed some brown spotting on a few of the mid/lower leaves. Does anyone know what this could mean?
I gave her her first feeding 3 days ago. 1/4 strength veg nutes and 1/8 strength bloom nutes.4y ago
1
3
Solved
Ionic20
Advice please :)This is 24 hours later. Should I just give some calmag now even tho the soil is still damp?Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
3
3
Solved
SLuGGeRNauT_420
WtfWtf is this just switched to remo nutes not overwatering only feed every 2 or 3 days when the medium is not dampLeaves. Curl down
Leaves. Twisted
Leaves. Color - Dark-brown
4y ago
1
3
Solved
IceeTea31
HelpWhat is the issue? do they need calmag or should i flush them?
if i should flush them what ph should this water have?Leaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
5
5
Solved
McLovin69
When should I put the pellet in the 5 gal pot??I am currently growing a tangie'matic with "a pot for pot" grow kit. At first the seed germinates in a pellet. Then it says "put pellet in 5 gal soil mix after 10 days or when the third set of leaves matches the second." I did it after 10 days and this happened.Leaves. Curl down
Leaves. Color - Dark-brown
5y ago
2
3
Solved
KrautFabrik
Some pistols turning brown. It's the 4th week, seems a bit early to me. Some idea?Week 12
Leaves. Color - Dark-brown
6y ago
10
4
Solved
Dragosani666
Top leaves turn dark and curl - What can I do?I've had Nitrogen and possible Cal/Mag deficiencies 2 weeks ago.
Mid last week I started noticing some burn a the tips, so i dialed nutrients back again.
By this weekend the tips of the leaves curled further and turned dark.
The rest still looks a bit pale, but buds look good.2y ago
4
5
Solved
Maraviglosos
Bruising or nute problem?I do not have enough characters here, please check diary for details. Some tops are showing some problems. The thing is, only a few and it does not seem related to light distance. My first thoughts is this is bruising, but I would like some more expert opinions.5y ago
3
Solved
Paul71
Help <3Hello, im growin 2 NL auto, Day 32 VEG, only fed 50 gr of Easy Boost by RQS mixed in soil, nothing more. Soil is BioBizz LightMix.
Temp≈ 29C on , 25 off. Average RH≈68%.
I dont know which deficiency i have, also newer growth's leaves tips seems like burned idk.
Thank you guys <3Leaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
4y ago
4