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
Calcium/magnesium
Vps420
started grow question 5y ago
Is that a deficiency of calcium/magnesium?
Solved
Week 6
Feeding. Deficiences
likes
Tweak
answered grow question 5y ago
What is your growing medium? If you’re growing in soil I highly doubt it’s a cal/mag issue as there is plenty of cal/mag for a grow in most quality soils, more likely you’re Experiencing pH fluctuations in your medium.
2 likes
Complain
Selected By The Grower
sir_isO
answered grow question 5y ago
Vague, though I would probably use calmag...but then, I'd probably also add a bit of sulphur and phosphorus if I have some.
1 like
Complain
OrganicNature420
answered grow question 5y ago
1.0 ml of calmag per 1lt will do it wonders for next week or 2. Then start lowering it 👍🏻🌱❤️🍁
1 like
Complain
Similar Grow Questions
Solved
Stonehigh
Epsom salt as fertilizer. Whats your take on this folks?
Epsom salt will not release hydrogen ions in water so my guess is that it will thus not affect PH. Making it a nice controllable source of Mg that would be not negligible right? How effective would that be to treat Mg deficiencies? Anyone has experience with this?
Feeding. Deficiences
4y ago
1
2
Solved
Michael1234
deficiency???
is it a nutrient deficiency ???
Week 4
Feeding. Deficiences
5y ago
1
2
Solved
Biggreyhoundbox8
Yellowing autoflower
These autos have been flowing for 3ish weeks now, they are both the same strain and the plant on the left is yellowing as you can see ,It's not taking up nutrients nearly as fast as the other plant. any feed back would be appreciated
Feeding. Deficiences
4y ago
1
Solved
The_Dank_Review
Not sure why but she is showing either magnesium, calcium, or potassium deficiency. Do you agree? My PH is 6.3 this water, and was 6 the last sprinkle I gave her.
Week 3
Other. General questions
Setup. Strain - Autoflowering
Feeding. Deficiences
6y ago
1
1
Solved
Quintus
Is this a deficiency or some form of toxicity (autoflo/cfl 125w/ led 300w)
Hello guys i'm a new grower, I have 2 plants one Purple Queen Auto and one Northern Lights Auto. On the lowest 2 leaves of the purple queen there is this thing (picture) It is only there on one plant only and they have the same water each time (1L) Do anyone know what i'm facing
Leaves. Tips - Burnt
Leaves. Color - Yellow
Feeding. Deficiences
6y ago
1
1
Solved
Dillsnills
Should I use distilled water instead of tap water and jus add nutes? I have a feeling my tap water is a little on the hard side 354ppms
Is distilled water better to use than tap water? My tap water reads 354 ppm, I have a feeling it's too hard so what I'm wondering is would I be better off using distilled and add nutes rather than using tap water? The pics ik I am feeding cal mag an some N next watering.
Other. General questions
Setup. Strain - Autoflowering
Feeding. Deficiences
5y ago
7
8
Solved
Foxtrotoscar
Overwater?
Hi People Just started some NYC Autos. 3 part coco&coir 3 part compost 1 part perlite 1 part vercumilite I watered generously as I heard coco drys out quickly but I seem to have over watered as they have stunted growth especially for just hitting 14 days old. Anybody any ideas?
Week 9
Feeding. Deficiences
5y ago
1
1
Solved
Killerz224
General feedback
Any feedback would be greatly appreciated, to me the plant looks healthy, however it is a bit small considering it’s age, right? I’m thinking it may be because of the cheap ‘300W’ light I was using at the beginning of the grow. What do you guys think? (Video end of week 6)
Week 6
Plant. Too short
Feeding. Deficiences
Techniques. LST
6y ago
3
3
Solved
oldleafybeard
Magnesium
I am a bit worried about the early oranging of the flower pistols, I have adjusted cal mag should I continue as normal and put progression down to pre existing deficiency now showing down the road? Certain branches/budsites showing amber pistols in first couple of weeks of flower
Week 6
Feeding. Deficiences
4y ago
1
3
Solved
Ganja_Victoria_Aus
Hi Legend, Not sure about it. Magnesium, Calcium, Ph. Maybe uptake or loss. She is growing well, big healthy. Ready for a second round of clones. After, I will let her sign in a bigger airy pot. Thank you for any suggestions 🙏
Week 13
Leaves. Other
Plant. Other
Feeding. Deficiences
3y ago
2
2
Solved
HideAndFly420
Calcium and silicium missing?
She definetley Miss something, i think i gave less bio grow of she needed during stretching, was thinking to add calcium and silicium with adv: calmag, sensyzim and revive. Do you agree or i am wrong? Do you suggest somthing else or some other product? Thanks in advance u all
Week 7
Leaves. Color - Yellow
Feeding. Deficiences
5y ago
4
3
Solved
minibox
deficiency during start flo
Hello happy grower, Which kind of deficiency is? I use bio tabs & she is an automatic. Only 2 tabs since start, does she need another one or half? My second baby feel well and received exactly the same.... Thanks forward !
Week 6
Leaves. Other
Feeding. Deficiences
4y ago
5
8
Solved
MarianPazdzioch
Azot
A skąd za dużo azotu?Leje tylko wodę pH 6,5 i nigdy nic nie dawałem
Week 3
Feeding. Deficiences
4y ago
2
Solved
leliantu
Hello everyone, today I found some plants with these spots on the leaves. Will it be calcium deficiency? What do you think? Any help is appreciated. Regards
Week 5
Feeding. Deficiences
4y ago
5
2
Solved
Jezbong
Is this the start of a cal/mag deficiency?
As the title says... Is this the start of a cal/mag deficiency?
Leaves. Other
Feeding. Deficiences
4y ago
1
4
Solved
Dudders
To flush or to treat?
Some yellowing leaves, mixture between cloudy and clear trichomes. Do I flush from here on in. Or treat a possible deficiency?
Leaves. Color - Yellow
Other. Harvest - Drying
Feeding. Deficiences
5y ago
3
3
Solved
ZigkGrow
Pest or Deficiency
This leaf seems also bitten. There are 4 bitten leaves. I will be checking to see if they become more. Is this white powder?
Week 3
Other. Bugs
Other. Mold
Feeding. Deficiences
6y ago
1
Solved
fiatchd
Leaf problems
I think I did use too much fertilizers, whats happening here? https://growdiaries.com/diaries/180523-grow-journal-by-fiatchd
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
3y ago
2
5
Solved
Quintus
Textbook deficiency/over feed, any advice on wich one ?
Hello guys ! I think i'm encountering a text book deficiency/over feed but can't figure out which one. This is a Frostbanger auto from 24buds in Plagron royal mix at week 4, under 150 led watt. Been giving her only some power roots & power zym with evaporated tap water :(
Leaves. Edges burnt
Leaves. Color - Yellow
Feeding. Deficiences
1y ago
4
Solved
soflo
What am I doing wrong?
I’m a new grower my leaves started to shrivel up at the tips and get brown. My friend told my it’s cause over watering so I water less but the problem keeps getting worse. It’s a month old and I use 2ml calmag 2.5 of micro and grow and 1 ml micro. I only water three times a week.
Leaves. Tips - Die
Other. General questions
Feeding. Deficiences
6y ago
5
8