The Grow Awards 2026 🏆 
Name the deficiency I belive it to be calcium / ma...
Mr_Weeds_Autosanswered grow question 5y ago
It's a Calcium/ Magnesium deficiency, for some reason plants under LED lights crave more Cal-Mag.
Similar Grow Questions
Solved
Kripoulas
Deficiencies while in late flowering during flushing periodThere is deficiency going on (looks like cal) she is an auto flowering strain in her 9th week and been flushed for a week now. Should I give her cal/mag and stop the flushing or is it too late to deal with that? She looks like she will be ready to chop in a week or so.Leaves. Color - Dark-brown
Setup. Strain - Autoflowering
Feeding. Deficiences
5y ago
4
2
Solved
Macfly
Deficiencia de Calcio@Gi773s Llevo una semana viendo esa pequeña deficiencia de calcio, creo que es provocada ya que decidí regar las 3 primeras semanas con agua osmotizada para aprovechar el sustrato Auto mix 2.0 sin alterarlo para la floración. Cal Mag para el siguiente riego, gracias hermano!Week 5
Feeding. Deficiences
5y ago
2
2
Solved
inhale_exhale
Magnesium deficiencylooked for similar cases in grow questions and now think it’s a magnesium deficiency. I use biobizz Calmag 0.5-0.8 ml/L like in guide. Last week 1 ml/L. but magnesium deficiency does not go away, Question for biobizz users, how much Сalmag can be used before overdose?Week 3
Feeding. Deficiences
2y ago
5
8
Solved
UKAgent47
General health and CalMag adviceReduced watering to 850 ml and seems to want this every 24- 36 hours. Plant seems to have perked up however still have yellow leaves / brown spots. I’m feeding 0.5 ml calmag per litre , should I continue this? Should I be worried about the state of the plant.Week 3
Feeding. Deficiences
5y ago
3
3
Solved
PeppaWutz
Cutting damaged leaves away or not?Hallo, I have some spots on leaves due to calcium deficencie and it has stoped spreading above leaves by adding calmag to the nutrient solution. We talk about 2 single leaves per plant (max 3 leaves). Should I cut them of because they need energy to recover or does it not care?4y ago
3
2
Solved
Dillsnills
Reasons for leaves being light green yellowish???Wondering what's going on with this seedling, the leaves r a very light yellowish green, fox farm happy frog coco coir, perlite mix about 60/30/10 ratio. LSD-25 auto from fastbuds, 1200wt led, 77day69night, 60%rh, 6 days old.growing in 3gl air pot advice input greatly appreciatedLeaves. Color - Pale
Setup. Strain - Autoflowering
Feeding. Deficiences
5y ago
4
4
Solved
CHILLING_RACOONS
NEED HELP! CRUCIAL PHASEExcess or deficiency?
I'm in the crucial phase of buds development, some leaves are getting brown and seems to be burned but I don't know if it is a burn or a deficiency.. On 17/01 I gave 2ml/lt npk 4-8-8 and npk
1.7-0-3 1ml/lt? What should I do? Could someone explain? Thank you❤️3y ago
3
3
Solved
John_Federic
Is this a magnesium deficiency?Why does my plant want to die?Leaves. Color - Mottling
Feeding. Deficiences
4y ago
1
5
Solved
Marlboro
Нлвые проблемы с переводом на цветениеЗаметил побеление на кончиках листьев. В основном на нижних, но есть и на паре верхних. Не могу определить, то ли перекормил, добавив Bloom booster, то ли дефицит калия и кальция с переводом на цветение, буду рад любым советам и адекватной критикеWeek 8
Feeding. Deficiences
3y ago
1
1
Solved
FiFrElOt
Demande de diagnosticBonjour, je suis actuellement en semaine 7, mon problème dure depuis la semaine 5 et je n'arrive pas à l'identifier... Quelqu'un à déjà eu un problème comme celui la?Leaves. Color - Dark-brown
Leaves. Color - Black or grey
Feeding. Deficiences
4y ago
2
2
Solved
prem895
Nitrogen?Wondering if somebody out there can tell me if this is nitrogen deficiency or what Cinderella 99Week 8
Feeding. Deficiences
6y ago
2
4
Solved
Mosherd7
Unknown rust on 7th flowering weekThis started as what I thought was a cal/mag deficiency, bought some, gave it for a week at a good dose and 6.3ph, and this intensified and switched from just lower leaves to the upper and a few sugar leaves on one plant. Any ideas? May calmag takes awhile? Or wrong diagnosis?Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
1
3
Solved
GrowersWild
Yellow leaves and Spotting2 part question. First I am getting a white fuzz that is growing on the sides of my pots. It goes away once the pot has started to dry out. Second, I am getting some yellowing with spots on some of my leaves. I am moving to bigger pots this week. Any Suggestions?6y ago
3
2