The Grow Awards 2026 🏆 
Calcium or Manganese deficiency?
WulfBludstarted grow question 3y ago
Calcium 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.
Solved
Leaves. Veins - stay green
Feeding. Deficiences
likes
Mr_Incognitoanswered grow question 3y ago
You probably confused Manganese with Magnesium.
likes
Complain
Similar Grow Questions
Solved
DrBuffy
How can I fix high runoff EC and pH?EC high (0.2ms/cm in, 0.6ms/cm out), pH runoff a little high (6.71 in, 7.18 out). Yellowing of leaves moving up plant, followed by yellowing between the veins on new growth. Help please!! Had issues with this one for a while so last fed 2 days ago with 1ml/l of Biobizz5y ago
3
7
Solved
budda420
Calcium deficiency or excess??Could anybody tell me whats happening here im assuming its either a calcium deficiency or excess any help would be much appreciated
PH is around about 6.5-6.8 every watering not sure about the run off or ppm
This is the only leaf with the spot on but showed up overnightLeaves. Other
Feeding. Deficiences
5y ago
1
1
Solved
PeterSage
K deficiency?in the last pictures you can see what to me look like an early deficiency of K. Since she is in the first stages of flowering I would say that's the case, reading the literature online i noticed a lot of similarities, what do you think?Week 12
Feeding. Deficiences
3y ago
2
2
Solved
Scratchie
Sulphur deficiency?This hindu kush has light green/yellowing coming from the centre and it has been going on for about a week, does anyone know why this is happening? I was thinking sulphur deficiency but given how rare that is, I would someone with more experience to give an opinion.4y ago
1
1
Solved
secaboy
DeficiencyIs this the signs of a nitrogen deficiency or am I not feeding enough Canna A&B? I'm coming up to end of week 4 of flowering.Feeding. Deficiences
4y ago
1
1
Solved
yinandyang
Spots on yellowing leavesBrown spots on dying yellow leaves. This has happened on most of my plants after budding so thinking it may be a soil problem. My guess is boron, manganese or phosphorus as the stems on some plants are red.
It starts low and eventually ends affecting buds too so I chop.5y ago
3
3
Solved
TheFattyMcCoy
Homemade inputs???What do yall think of my diary?
All homemade inputs, I invest literally less than 20 bucks in my inputs in the entire grow. I want to prove to you all that you do not need to drop money on bottled nutes, remember bottles are for babies. Challenge me? Just look at my diary3y ago
8
5
Solved
BisEsKlappt420
Does the females look good ? First grow alert.Week 3.
BioBizz all-mix, 3.5gal pots, 450w-led , NL-Auto; Royal Queen seeds.
So far I have only fed them root juice.
I overwatered the seedlings at the time. the all mix is still wet to this day.
three of my plants have a leaf with a light spot.Leaves. Veins - stay green
Leaves. Color - Yellow
3y ago
1
1
Solved
CPsmoke
Banana manure mix with brewer’s yeast, are they enough for a good flowering ?Hi everybody, I planted a Runtz auto from Zamnesia outdoor, and it’s been almost one week which has gone into flo. My question is : for fertilizers, I use banana manure mixed with brewer's yeast, is it enough to have a nice and successful flowering ?Buds. Other
Plant. Other
Feeding. Deficiences
5y ago
3
3
Solved
thenewdude
my biggest-plant is going yellow in the center, is that a deficiency or normal? I was going to give it the first feed of fish mix tomorrow with 125 ml of waterLeaves. Color - Yellow
Feeding. Deficiences
6y ago
2
3
Solved
whoawhoa
Calcium def? Phosphorous? Potassium excess? Boron?Week 5, NL Auto, Brown spots and some red stems. Coco coir + Pelite (70%/30%), RH 60%, temps 22~26 Celsius, watering every 1~2 days 2.5L. GHE Flora Series, 1ml/L of each bottle (Micro, Grow, Bloom) and 1ml/L of Cal-Mag. EC 1.3~1.4, pH 5.7~5.9, watering until 10~20% runoff.6y ago
5
6
Solved
GrowDiarhia
What does she need?What does she need?
Should I give more cannabio bloom and water for here?Week 10
Feeding. Deficiences
1y ago
5
4
Solved
bearded420
Do i have some nitrogen toxicity?...Do you think they’re suffering with some nitrogen toxicity? If so, how do you recommend i fix or balance it out?... growing organic no till with water only and occasional compost tea. I top dressed 3 weeks ago with an organic dry amendment and think thats where I’ve over done it.Week 9
Feeding. Deficiences
6y ago
4
3
Solved
Xistence
Calmag every watering?Should I be adding calmag+ to every watering? I've been using 50/50 pur+ tap water and distilled water. Ppm is 245 at 50/50 and pur+ filters chlorine. I've also added 1tbsp per gallon of unsulphured molasses and that adds 68ppm. Day 40 right now.Week 7
Feeding. Deficiences
2y ago
1
3