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
Magnesium deficiency?
JERgarden
started grow question 6y ago
It seems this girls is showing a magnesium deficiency? If this is correct, should I increase the cal-mag doses or should I just give her a high dose of epsom salt? Appreciate the help!
Solved
Week 8
Leaves. Veins - yellow between
likes
Fruitgrower
answered grow question 6y ago
I'm not really sure what that is but it's not magnesium. Perhaps it's some kind of overdose/lockout or over/under watering., 🌱👍
2 likes
Complain
Selected By The Grower
HighRoller909
answered grow question 6y ago
not a deficiency. ph problem. check your soil ph. it looks off
1 like
Complain
growbie
answered grow question 6y ago
i thing too much nutes. Happend to me, same color on leafs like main.
1 like
Complain
Similar Grow Questions
Solved
StuG69
Is this a Magnesium Deficiency?
Hi all, Day 98. Northern Lights. 1 of my 3 NL girls looks to have a bit of a Mg deficiency. I'm close to harvest so not too worried however it would be nice to have a confirmation for future grows/learning as I'm very much a noob still. Can anyone confirm/correct me please
Week 14
Leaves. Veins - yellow between
5y ago
3
3
Solved
DannywithaJ
Welchen Mangel hat Sie?
Meine Planze weißt Mangelerscheinungen auf den Ältesten Blättern. Habe daraufhin CalMag und Stickstoff erhöht. Dachte es liegt daran. Offensichtlich nicht. Hat jemand eine Idee?
Week 4
Leaves. Veins - yellow between
Leaves. Color - Yellow
6mo ago
2
5
Solved
biuxiuer
我的女孩怎麼了,這個是生病了嗎?還是太多的餵食?
在他長出第二對葉子的時候這樣的現象就出現了,但是只有一邊有葉子,我查了相關資料顯示這是菸草鑲嵌病毒(Tobacco mosaic virus;TMV) 我覺得挺像的。但是不是很確定,我該繼續等幾天嗎?還是把葉子切掉。 誰可以告訴我解決方法,希望他可以度過生長期,因為他是自動開花,每一天都很重要。
Leaves. Curl up
Leaves. Veins - yellow between
Feeding. Chemical composition
4y ago
3
3
Solved
legal_grower
YELLOW LEAF TIPS
Leaves. Veins - yellow between
Leaves. Color - Yellow
2y ago
1
1
Solved
Jungian79
I’ve got a problem but not sure what it is. It appears to be yellowing in the leaves, maybe a magnesium lockout despite me adding magnesium and calcium. I had the same problem with my last grow but it’s much worse with this one. I’ve checked and calibrated my ph pen. Im blaming the soil which is Biobiz light mix. Please see photos for week 4 and tell me what you think. Thanks.
Week 4
Leaves. Veins - yellow between
6y ago
5
5
Solved
TonyTrichomes
I have a deficiency. Can you please check out my pics and give your advice? I thinks its a Magnesium deficiency, am I correct? Increase CalMag? Flush with extra water? Any tips would be helpful.
Week 11
Leaves. Veins - yellow between
Leaves. Color - Yellow
6y ago
4
3
Solved
GronkLeague
First grow yellowing seedlings :( nute problem?
I seem to be following all the instructions on grow temperature range, light distance, and watering schedule(only watering hen the medium is drying); I've hardly used any nutes until day 22 as advised and I personally think this has caused me some issues although I may be wrong.
Leaves. Veins - yellow between
Leaves. Color - Yellow
Leaves. Color - Pale
6y ago
3
4
Solved
skeeter
Is that discoloration normal for a plant at the end of flowering? My other plants also have some of this discoloration and they're not into flowering yet.
Week 11
Leaves. Veins - yellow between
Leaves. Color - Mottling
5y ago
2
2
Solved
High_from_The_Hammer
Think i have some deficiency maybe Mag ? yellowing of predominantly new growth areas (see 5th photo) tried a foliar spray and water in with Epsom salt 0.1 g/l ~ 200ml for each plant we will see if that helps also added some Pacific Natural Fish Hydrolysate (2-3-0) 1 l @ 1:100 Any
Week 14
Leaves. Veins - yellow between
5y ago
1
Solved
CannaMom2
Deficiency or Burn?
I have used Happy Frog before with no issues. I am running my first 420 Fast Buds seeds and they seem to have nute burn for the last few weeks no matter what I do. Is this maybe a deficiency and not burn?
Week 5
Leaves. Edges burnt
Leaves. Veins - yellow between
Leaves. Color - Pale
2y ago
2
6
Solved
Franzl
Whats wrong with her ? Clawing and yellow spots
Im a first Grower. Here some info: Location: Indoor, 60x60x180 Light: Mars Hydro 1000 Soil: BioBizz Light fertilizer: BioGrow GreenHouse pH: ~7,3 Temperatur: 23°C 3x Fast Eddy CBD One of them girl got problems Im afraid that she will die. what can i do? Every day it get worse.
Leaves. Curl down
Leaves. Veins - yellow between
Leaves. Color - Yellow
4y ago
5
Solved
ClaireCrystal
3 week old Skittles plant
This is one of my skittles plants I'm growing right now. One of the leaves on her started getting lighter spots near the veins. It is only a little right now but I am wondering if there could be an issue that I could solve before it gets worse.
Leaves. Curl down
Leaves. Veins - yellow between
3y ago
2
5
Solved
DougJitsu
Possible Nutrient Deffiency
Possible Nutrient Deffiency. I've noticed some yellow running down my leaves on one or two of my plants. I'm wondering what it could be? The ph is perfect of 5.9 Any help would be aplriviated and happy growing!
Leaves. Veins - yellow between
5y ago
3
Solved
BlumenBot
Deficiency or excess?
I seem to have this same issue or similar issue with every grow. What am I screwing up? Affecting my largest fans.
Week 10
Leaves. Dropping off
Leaves. Veins - yellow between
Leaves. Color - Yellow
5y ago
1
7
Solved
Maskedcucumber
Brown roots : Is this Pythium?
Is it chlorosis, deficiencies, septoria, pythium ? calmag, iron, H2o2 or mycorrhizae needed ? What would you do to save the crop (preflowering stage) ? Thanks a lot for your help
Week 8
Leaves. Veins - yellow between
Leaves. Color - Yellow
Roots. Color - Brown
4y ago
5
5
Solved
Qutro
Top leaves
Hi Growmies, Two weeks ago i noticed that there are some yellow stripes appeared on the top leaves. The PH fluctuates in DWC can this cause some micro nutrient deficiency but I don’t really know. Do you have any ideas what could be? Thanks
Week 5
Leaves. Veins - yellow between
2y ago
15
7
Solved
treeofsong
hey guys, a few days ago i realized that some veins are yellowing, i think its because i didn't use florakleen when the plants started flowering, and all they have a Mg under, if someone has any suggestion i will appreciate
Week 6
Leaves. Veins - yellow between
8y ago
2
4
Solved
gornt
Stunted leaves
One of my plants is having a hard time - it's technically growing as fast as the others but it's leaves are half the size, slight discolouration and cupping. I suspect Mg, PH or overwatering may be the issue. All variables for each plant are exactly the same.
Week 4
Leaves. Veins - yellow between
6y ago
2
2
Solved
PricklyPete
Mag Def?
Does the yellowing between the veins on these lower leaves look like a magnesium deficiency?
Week 13
Leaves. Veins - yellow between
Leaves. Color - Yellow
5y ago
2
3
Solved
Merulix
Giving CalMag but getting magnesium-deficiency?
Hi Guys, this looks like a magnesium-deficiency to me. Its only one plant of three looking that bad. almost all leaves look like this one in the picture. The thing is i am giving full dosage Calmag with distilled water with my other nutrients at PH 6.2 - 6.7. Soil PH is 6.5ish
Week 5
Leaves. Veins - yellow between
1y ago
3
2