The Grow Awards 2026 🏆 
Is this magnesium deficiency?
SherbGrowsstarted grow question 4y ago
Organic grow. Noticed yesterday that my one girl has color fading from the fan leaves. I gave her 1 tsp of epsom salt per 1 gallon today and ph'd at 6.7. Was this the correct thing to do? Or should I adjust ph next time?
Solved
Leaves. Veins - yellow between
likes
Robertsanswered grow question 4y ago
Yes it is magnesium deficiency. I would of ph it at 6.4 buti dunno how your ph is doing.
SherbGrowsanswered grow question 4y ago
Just to add. I just ph'd my soil with a soil testing kit and it is around 6.
likes
Complain
Similar Grow Questions
Solved
BrannabisTHC
Deficiency or Ph? Oh what could it be! Dun dun dunnnHey all. All 3 of my Blue Domina Gelato are fading at the beginning of the leaf fingers then going outward. There are also brownish colours on the new growth. You can see it in the photo Do someone maybe have an idea of what's causing this?
Ph: 6.4
Medium: in pictures
Thanks!Leaves. Veins - yellow between
4y ago
2
Solved
LittleManGrow
Need yellow/brown spot diagnosisAny ideas on what might be the cause of these spots?Leaves. Veins - yellow between
5y ago
2
Solved
Eagers
Help diagnosing deficiencyCan someone help diagnose this? Is this a Nitrogen deficiency or a Potassium deficiency, Ph runoff is fine 6.4 and EC runoff is 1.8. Lower leaves have been yellowing and dropping so last feed I upped grow to 1.5ml/l from 1.0ml growth has been good. Dont want issues now tho ThanksLeaves. Veins - yellow between
Leaves. Color - Yellow
5y ago
1
1
Solved
cannanova
White/Yellow snipes on leaves? (13th day of growth from seed)I noticed a huge change in my plant leaves in less than 24 hours. The leaves look like they are getting burned out. What is happening? I'm uploading pictures to see the problem and also the growth conditions.
I'm watering once every 1 or 2 days (PH = 6.0). Not using nutrients yetLeaves. Veins - yellow between
Leaves. Color - Pale
Leaves. Color - Mottling
3y ago
3
3
Solved
Darox
I did mention in my comment that I water about 800 Ml twice per day split between 6 plants in the 1 large pot and can notice quite a few of the plants have slight yellowing. So not sure if this is a watering issue or nutrient problem or normal.Week 2
Leaves. Veins - yellow between
7y ago
12
9
Solved
Dungeons_of_Dankness
Has anyone else heard of using epsom salt with gallon of water for magnesium and sulfur issues? I'm told you can water them or spray them during lights out. I've had some issues before with magnesium due to soil pH recommended by maker didn't follow it I later corrected it pH4y ago
8
7
Solved
D42ONubie
Need help! Nutes, light, or something else going on..??First grow, indoors. Candy Kush Auto currently at 8wks, flowering. Been going smooth up until 1wk ago. Now lower and mid fan leaves yellowing, browning, top leaves turning purple and look wilty, stems also deep purple color. Come this far, don’t want to loose herLeaves. Veins - yellow between
Leaves. Color - Mottling
Plant. Stem - Red or purple
4y ago
1
1
Solved
thebestine
Is this nute burn / deficiency? Or light burn? Or both?What's going on with the intervenial chlorosis? Is it nute burn (zinc + manganese + iron potentially)? Is my proposed solution of only going with pH-balanced water a good mitigation strategy? Should I just not add super soil out of the gate?Week 2
Leaves. Veins - yellow between
4y ago
1
5
Solved
PaxIlluminare
Does anyone one know the deficiency causing the leaves to yellow in this fashion?Leaves. Curl down
Leaves. Veins - yellow between
Leaves. Color - Yellow
3y ago
1
1
Solved
DabNinja710
Nitrogen deficiency? What can I do to fix it?My gorilla girl xl aut is getting a nitrogen deficiency. I think? Im using megacrop. about a ½teaspoon every watering. Also a 1/16tsp of bud explosion and sweet candy. Should I add more? I have the whole line of fox farm nutrients. Anything from there that would help?5y ago
1
1
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
smokeDK
Hi there, this is my first time growing ever. I am very concerned about the leaves. They turn yellow(like a pattern) and turn brown and fall off. It started 2 weeks ago an become worse and worse. I will do anything for some help :)
Best Regards, dude from DenmarkWeek 9
Leaves. Veins - yellow between
8y ago
1
1
Solved
Rogue3000
Need help to detect deficiencyBlue Dream Auto by FastBuds, she's on 2nd week of flower.
Leaves start curling up and there's some grayish discoloration between veins.
Last 2 days it was 70% humid and temp around 19 C
What can cause a problem? White Widow nearby totally okLeaves. Curl up
Leaves. Veins - yellow between
1y ago
8
5
Solved
Newgrow25
How can I tell the age of my autoflower?Found out my plant is an auto flower and im at the 4th node can I top or lst? And im starting to see small leaves forming at the base of the node by the main stem. Is that normal so early? Plant less that 3 weeks old from seed by my estimate. Was give after sprouting from solo cLeaves. Veins - yellow between
Setup. Strain - Autoflowering
Techniques. LST
5mo ago
1
1
Solved
elevensixty6
Still to early to tell? Noticed yesterday and have slightly worsened today. Not sure the issue but potentially magnesium? Getting close to top dress also.Only on 1 of 3 plants so far. On older growth after getting dose of Recharge the other day. Maybe an N problem as I also use 484? Or mag? Using CalMag every other watering in RO at 150ppm as the soil has some cal and mag. Also getting close to top dress time maybe something else?3y ago
4
