Check the winners The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Log In
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
English
Log In
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Magnesium deficiency on my plants?
kaiabel
started grow question 3y ago
My tapwater is lacking some mag, and im working with checked ph level 6,3 - 6,5. It looks like they have mag deficiency right? Going for bittersalt to correct the mag problem. Any tips?
Solved
Feeding. Deficiences
likes
GrowingGrannie
answered grow question 3y ago
You could also use Epsom salts.... https://www.royalqueenseeds.com/us/blog-epsom-salts-a-natural-hack-to-grow-healthy-cannabis-plants-n837 Good luck!
likes
Complain
Selected By The Grower
Similar Grow Questions
Solved
BRLGrow
Leaf diagnosis
What’s could be these yellowing on these leafs? I flush it and looks like is not spreading , only some leafs on the top mostly
Week 8
Leaves. Other
Setup. Lighting
Feeding. Deficiences
5y ago
6
8
Solved
born_it_all
Deficiency or excess of nutrient?
Hi guys, I need help please, i'm noob. What kind of deficiency/excess nutrient is that? Thanks a lot
Week 5
Leaves. Color - Dark-brown
Feeding. Deficiences
4y ago
4
3
Solved
buddhi_coop
Organic CalMag Remedies/Products
What are some organic remedies/products for Cal/Mag deficiencies?
Leaves. Other
Plant. Other
Feeding. Deficiences
5y ago
3
3
Solved
Shockolateman08
Spots on leaves
What are these spots? There's no bugs, well a fruit fly a week ago and the spots I thought were from them, it's not mold either. Also if you can see the rust spots on a couple leaves.
Leaves. Other
Feeding. Deficiences
6y ago
5
Solved
Nacho64r
Carencia o falta de riego
Por que las hojas de mi godzilla auto se están poniendo amarillas y se caen? Es por carencia de algo? En el último riego note como mejoraron un poco pero han vuelto a ponerse amarillas
Week 6
Feeding. Deficiences
3y ago
3
2
Solved
MrVic98
Nutrient problems I cant identify confidently as I am a noob
Hmmm, I've got some nutrient issues by the looks. Is that dark splotch on the leaf indicating phosphorus deficiency? My pH is OK. Looks like a few things are going wrong. Thanks!!
Week 3
Feeding. Deficiences
6y ago
3
Solved
whoawhoa
Orange/Brown spots and marks
Found some orange/brown marks on my plant. I'm new to this, so I don't know how to diagnose those problems properly, anyone could help? 😀 Didn't notice those marks on new growth though.
Week 3
Leaves. Twisted
Leaves. Other
Feeding. Deficiences
6y ago
2
7
Solved
TerrazasBrew
Deficiency
Could you spot the deficiency? Calmag? Light burn from droplets of water? 6weeksThis auto Critical FastBuds has been growing slow and now is showing stagnation signs, and her sister is now flowering and looks much better, but lower leaves looks the same on both.
Week 6
Feeding. Deficiences
5y ago
1
1
Solved
francisgerald
Is this plant hungry?
Is this plant hungry? It's an autoflower, day 23, growin purely on coco, pH 6.2, feeding off Remo Nutrients (Micro, Magnifical, VeloKelp, Grow, Nature's Candy). I'm currently feeding her with 2ml/l, 600ml a day, with a 20% runoff.
Feeding. Deficiences
5y ago
1
1
Solved
ottoman
Brown spots on leaves
What seems to be the problem with my plant? The old leaves get brown spots whereas the newer ones have yellow edges. Is it a pH issue? Is there a fix to this? I grow in soil and the plant is 4-5 weeks old. Thanks for help!
Leaves. Color - Dark-brown
Feeding. Deficiences
3y ago
1
Solved
High_flying_scotsman
Yellowing help
Previously posted about yellowing but getting far worse now😔, is this a magnesium deficiency, only on fan leaves. Thanks
Leaves. Color - Yellow
Feeding. Deficiences
6y ago
4
4
Solved
TheNewGuy94
Deficiency or screw up?
What is this? At first I thought it was a phosphorus deficiency so I flushed with extra bloom nutes & overnight the damage doubled. Is it a pest or did I just fuck up bad? She also has seemed to have stopped growing. No noticeable diff in size recently
Feeding. Deficiences
5y ago
1
2
Solved
GreenCosmos
Calcium deficiency?
Saw this little brown/yellow parts today. She is in BioBizz LightMix Soil and gets 0.3ml/L BioBizz CalMag 3x per week. pH is above 6.5 . Today I gave her 1ml/L CalMag. Was this the right choice? Is this a calcium deficiency?
Leaves. Color - Dark-brown
Feeding. Deficiences
3y ago
2
2
Solved
LoganatorDude
What nutrient is causing this?
I know for a fact that it is some kind of nutrient issue. I’m not sure what but that’s what makes the most sense. Because it ONLY shows on very early growth and then disappears as the new leaves continue to grow. I’ve been through very cold weather and never seen this.
Week 11
Feeding. Deficiences
4y ago
3
4
Solved
BiagioTST42
Urgent help needed: wilting at wk3 STRAWBERRY LEMONADE (BARNEYS)
Plant is left one, 20 days old Evident wilting yesterday night (in trendy way since few days) -Soil (light mix) dry for 1 inch -Added 0,3lt of water with (ml: 0,45-Bio Rizhot. & 0,15 Org BAC) -PH checked IN & OUT: 6< PH <7 Minimal improvement SUGGESTIONS PLS? THANK YOU!
Leaves. Wilting
Feeding. Deficiences
4y ago
1
2
Solved
CastlesMadeOfSand
Light schedule/curling tips
Hi guys I w move her outdoor the next month- when here in italy we have 15h 30m day length.I don't know if reduce hours slowly when i have to move her outdoor..any suggestion?Then she start to shows some curling tips on the leaves.. It isn't overwatering Maybe n deficiency or tox
Week 3
Leaves. Curl down
Setup. Lighting
Feeding. Deficiences
5y ago
1
1
Solved
PenguHB
Cal-mag deficiency?
Hi guys, I think it's magnesium deficiency (early flowering). I have also noticed a few small burnt spots on the leaves. Is this time for cal-mag? Or am I reading this wrong?
Leaves. Color - Pale
Feeding. Deficiences
5y ago
2
3
Solved
DojaMon
leaves yellowing
northern lights auto in week 2 of flower: leaves started yellowing from the bottom. it’s been going on for about two weeks, and now the leaves around the middle are yellowing too, and some of the yellowed leaves have brown spots in the middle. 8L pot in coco, fed lucas formula
Leaves. Color - Yellow
Feeding. Deficiences
4y ago
5
Solved
Sinsigrowing
Nutrients deficiency, sulfur,potassium and cal-mag ???
Feeding. Deficiences
5y ago
2
Solved
Odin9
Is this to little cal mag water is only 33 ppm before adding nutrients i only use 0.3ml calmag. Tho little. Ph 6 7.watered the 6,2 to day.
Hey there growers I ned som help on this 2 test plant. I plantet them 17/6 out side in cold north Europe.i started them on som soil from my mama's garden😅mixed a mix whit cow fertilizer soil. Put them in tent after I got all I Ned for a propely grow🙌the ppm is 956 Ca on both...
Feeding. Deficiences
5y ago
1
3