The Grow Awards 2026 🏆 
Magnesium deficiency on my plants?
kaiabelstarted 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
GrowingGrannieanswered 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!
Similar Grow Questions
Solved
Dillsnills
If I do a mini flush to help w pH issues in my soil can I give a nute feeding right after or wait until next watering?If I give a flush to help with pH issues can I do a nute feeding right after I flush or should I wait for the soil to dry out and do it next watering? The pH in the soil needs to be fixed asap any advice opinions is greatly appreciated.Leaves. Color - Yellow
Plant. Other
Feeding. Deficiences
4y ago
3
4
Solved
Dankybongtoker69
Should I wait for deficiencies to introduce more nutrients? I haven't given these plants any of the A.N. veg nutrients that I have for them. We are at week four today. Maybe there are deficiencies that someone could point out to me from my photos?Week 4
Feeding. Deficiences
6y ago
4
2
Solved
WulfBlud
Add CalMag or Manganese? Still slightly discolored and veiny leaves on week 6Calcium or Manganese deficiency? Last week had what I thought was early calcium deficiency. Gave it a dose of CalMag but now not sure if it’s still Calcium or possibly Manganese.
I do mean manganese but I realize it could be a CalMag or Manganese deficiency as well.3y ago
2
Solved
Viccrazyweed
Critical showing deficiency or excess, anyone know how to solve it???One of my beauties is showing for the first time a nutrient issue, a couple of leaves are showing yellow colouring, the very rest of the plant is homogeneous deep green so i assume she is almost fine, but i really want to listen to her and care, I think it could be nitrogen def3y ago
2
3
Solved
thenewdude
please take a look and let me know if I can do anything to fix what is happening. thanks!!please look at my latest week 4 pictures and tell me if you think 2 of my younglings will die or bounce back. I had to leave 5 days. rh shot down and temps shot up ( ac failed me and humidifier ran dry 2 days before I got home I think)
found them fully dry and curled5y ago
2
2
Solved
Flauros
Help please with feeding advice.Hello.
Input: Calmag 120ppm, Pk 150ppm, A+B 160ppm, megafol 51ppm, melassa 5ml, Total input 739ppm, 5.97ph.
Output: first drainage 1000-1100ppm. Last drainage output: 5.7ph, orange 960ppm, Cbd 817ppm, Zkittlez 1000ppm. Dont understand, what happened with my girls after 3days lateWeek 7
Feeding. Deficiences
5y ago
2
1
Solved
FreshCoastOrganics
Deficiency?Hey everybody,
I’ve never really dealt with deficiencies in autos as most of my experience is with growing photos outdoors.
Does this look like a magnesium deficiency? These just appeared over night on just two of my larger growing white widow autos.
Please let me know, thanks!Leaves. Edges burnt
Other. Other
Feeding. Deficiences
5y ago
3
2
Solved
Warzouz_grass
Problema con mi Runtz MuffinBuenos días,
Tengo un problema con mis hojas, (puse fotos para que podáis ver).
He visto que podía ser un deficiente de fósforo. Pero también puede ser un problema de calcio y de magnesio.
Alguno podría ayudarme con eso ? Que tengo que hacer ? Añadirle un PK 13-14 ?5y ago
3
3
Solved
Budcultivator
Leaf spots issueDoes anyone know what is causing the leaves to look like this?
Throughout the whole grow i've had brown spots as you can see in the older pictures, although adding calmag didn't really fix the issue.
If anyone has an idea of what this could be please let me know!5y ago
4
Solved
Aonjacktallbeck
Ph problem?Is this a ph problem or something else? My meter doesn’t seem to be accurate. I’ve been feeding top crop veg once a week and ph 6.3 (soil), my run off was a bit high, a gave just plain water (ph 7) but no help. Photos from two plants. HeeelpLeaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
1
1
Solved
Green_Knight
What is the best choice for a reasonably priced, accurate PH meter?
I have yellowing new growth.Feeding. Deficiences
3y ago
5
7
Solved
Snailcocktail
CalmagWhen should i start watering calmag? In my last grow all my leaves startet ro crumble and looked nasty because i had a calmag deficiency, i then had to buy it and s lot of damage was already done. So when is a good point to start watering it and at what dosage should i startFeeding. Deficiences
2y ago
4
Solved
Ultraviolet
Super buff cherry Gelato grown with 20% Bruh science.My super buff cherry. Almost time to shock closed those stomata using hormone ABA(Asbisic Acid) inducing abiotic stress, simultaneously using light signals to increase terpene/flavinoid production while having no Pr/Prf conversion to release VOC via shocked closed stomata.Buds. Not fattening
Leaves. Tips - Burnt
Feeding. Deficiences
8mo ago
1
5
Solved
MrGreen92
Is this definitely CalMag deficiency? Check diary for video.Before I go to over the top with the CalMag in a stupid attempt to nurse my plants back to health I just want to know for certain what it is.
The leaves are clawing, bronze spots everywhere but the smallest of the 3 doesn't seem to be suffering as much.. what is it?!Week 8
Feeding. Deficiences
5y ago
2
7