The Grow Awards 2026 🏆 
Magnesium deficiency?
Dr_Nowzaradanstarted grow question 5y ago
Could it be magnesium deficiency or something else? I'm already using biobizz cal-mag with the suggested dose.
Tx
likes
Hashyanswered grow question 5y ago
I don't think it's magnesium problem. Also not a calcium problem. Is it a lower leaf and has your pH been on point.
homerjgangiaanswered grow question 5y ago
Hi mate..
Yes i really think is a PH issue... Easy to solve!!!
Good luck with your grow mate!💪💪
1 like
Complain
Hashyanswered grow question 5y ago
Just had a look at your diary. Have you got plenty of drainage because you plant looks a little over watered. Make sure you get run off when u water.
1 like
Complain
Similar Grow Questions
Solved
PoleKat
Strange coloured fan leaves (3) on one of my 4 plants, maybe some sort of deficiency? Thanks people!Hey there smart people! I have about 3 strange coloured fan leaves on one of my 4 plants and I’m not really sure what to make of it. To me it doesn’t look like any deficiencies that I came across per say. All other leaves look nice and healthy. Kinda randomly scattered. THX!6y ago
2
Solved
MGonzaga
Small dotsSmall lighter dots started to appear in some leaves, some leaves are getting yellow, whats is this? (last photo)Leaves. Color - Yellow
5y ago
1
2
Solved
Kagesan
Yellow leaf tipsHello,
I think I have a slight over-fertilisation.
Could someone have a look at this. And could someone explain to me in this context whether and how bad it is that the water does not flow through when watering. I have never had water under the pot.Week 2
Leaves. Color - Yellow
2y ago
11
1
Solved
h4rak1ri
PLEASE HELP ME, my frozen black cherry is drying, what could I do?It’s in the early third week of the flowering phase, but I don’t know some lower branches are drying out day by day, the first three photos shows what I mean, the last one is of the higher branches. Haven't watered for a day, but I don't think its a overwatering problem.Leaves. Curl down
Leaves. Color - Yellow
Other. Other
2y ago
2
3
Solved
Danielkendle
Nitrogen burnHow can I counteract nitrogen burn?Week 4
Leaves. Edges burnt
5y ago
1
1
Solved
HowsItGrowingHydro
Burn? Deficiency? Hydroponic fgrowproblems in DWC. I am using TA nutrients (Lucas formula). Running EC 1.8 and pH 5.8. One of my plants look good but the other plant shows lots of problems. RH is 55%, Temp 25-26C. PPFS is 450μmol/m²/s on average. Any idea how to fix it? Dilute the nutrients? Ideas welcomeLeaves. Edges burnt
Leaves. Curl down
Leaves. Color - Pale
1y ago
2
Solved
KISSOU
Color leafHello everyone I have a question here the plant (on the right) turns yellow we can see it in comparison to the other This plant has been flowering for 3 weeks and is 53 days old. I use the nutrients from the Biobizz range, I water twice a week with it. Why yellow leaf? 😳Week 8
Leaves. Color - Yellow
5y ago
3
3
Solved
Dillsnills
Need some help as to what's going on w this plant? Leaves are turning kinda yellow towards bottom, excess or not enough nutes?Trying to figure out what's going on w this plant,lsd 25 auto, ppm runoff was 1400 w jus ph water going in,ph6.5, should I give a nute feeding next or stick w jus ph water, it's not showing any signs really of mute burn, jus a dose of calmag next feed or full nutes at 1/4 dose?Leaves. Color - Yellow
Setup. Strain - Autoflowering
Feeding. Deficiences
5y ago
5
3
Solved
Fattorello90
Yellowing of seedlingHi guys, I have another question for you. I have realised that only one of my seedlings is light green/yellowing in the inside of the leaves and the new ones sprouting. The other plants are vivid green. Any idea on what is happening?Week 1
Leaves. Color - Yellow
3y ago
1
5
Solved
4Ganic
Looking at my pictures you can see an obvious nutrient deficiency, can someone help me to identify it?Week 4
Leaves. Edges burnt
8y ago
2
2
Solved
ganzigunnu
Demanding More N?Blueberry Kush Auto day 56. 3 weeks into flower last two feeding 2ml calmag, 1 ml bio grow, 2 ml bio bloom basically. the microbes product raises ph to 7.5 and I feed without adjusting. Is it okay? it showed excess N so I didn't go up for more. and she has some blackparent dots.Leaves. Color - Yellow
Feeding. Chemical composition
3y ago
4
4
Solved
Barbieslapping808s
Update on previous deficiency questionUpdate on previous deficiency question
The leaves got worse, its still only a few so not too bad. After doing some research i think it could be a Manganese, magnesium and/or Sulphur shortage.
I fed some liquid calmag a day ago. I plan to use epsom salt if there is no change5y ago
2
5
Solved
KINGT88
HelpI need help my plants are changing colors brown like dying. What am I doing wrong I water them, I recently brought some Fox Farm Products,( Tiger Bloom, Big Bloom, And Grow Big). I haven't used them yet because I think it's still too early. Any advice would be greatly appreciate.Week 3
Leaves. Color - Yellow
3y ago
12
7
Solved
PortkeyCannabis
Low cal mag?Is this low cal mag? Or just recovery from the nute burn? It looks like new growth?Week 6
Leaves. Color - Yellow
4y ago
4
3
Solved
I_roll_my_own_420
Hello guys. Im having Is it too much or too low nitrogen, thah causes my bottom leaves yellowing? 600w, 1m2 tent. 2m tall. 6x autos, 4 diffeternt models.Plants were too green and leave tips were pointed down. I stopped adding nut. for 11 days. Here is picture of today, right after watering with 2ml bloom in 1.5l bottle. ph 6.8, 340ppm. Should I feed them more, or not? Its week 5 from seed, and they are autoflowers. 4 dif. strainsLeaves. Curl down
Leaves. Color - Yellow
Setup. Strain - Autoflowering
6y ago
1
1
Solved
lotuslord
Is this a deficiency?Hello there,
Today I saw that some of my plants have some curled and sad looking leaves (see pic). The soil is pre-fertilized and I currently use normal tap water (p.H. adjusted) for watering. My plants get 18hrs of light a day (approx. 300-400PPFD)
Thanks for you help guys :)3y ago
2
2
