The Grow Awards 2026 🏆 
Still cant work out this deficiency feeding cal ma...
as_smas_terstarted grow question 5y ago
Still cant work out this deficiency feeding cal mag.could it be light intensity? please help fellow grower out
likes
Answer
The8thChevronanswered grow question 5y ago
Calcium deficiency. Caused by either lack of calmag or too much bloom nutes.
1 like
Complain
Similar Grow Questions
Solved
ElevatedThinking
Why are there soon many brown spots all of a sudden in WK 7?I'm entering Wk 7 and the same lady is hurting again. She's been feeding heavy for last few weeks and doing great. So, I gave a light water/microbes dose w/can and Epson. Now I think its potassium or something else entirely... Brown spotting, yellow, crispy? Thoughts?6y ago
3
3
Solved
tangie
Yellow & brown spots in 2nd and 3rd week in coco-perlite nursery cup. What am I doing wrong? Fed until 20% runoff (extra), strained. Smth with roots?2nd grow in 70/30 coco-perlite mix* & very similar issues w. yellow/brown spots in weeks 2-3, then stabilizes.
*CalMag & pH buffered 6h @ 0.5mS, pH5.8, strained** & seed planted.
Feed:
W1: **Strained sol. + water 70/30, pH5.8
W2: AN M+G+B 1-1-1 + Simplex CalMag Plus 0.4mS
Help1y ago
9
5
Solved
Spike-GreenGrower
A deficiency, a toxicity and a toxic-deficiency???Here's what I make of it (and PLEASE correct me where I am wrong!) :
The tips yellowing indicates, a nitrogen burn.
The burnt brown tip indicates, nitrogen burned to long 😂
The black spots indicate, a P or K issue (as the leaves are otherwise healthy green in color)1y ago
4
4
Solved
Birch_trees_breeze
How can I turn thing back good againMy ph is running around 6.5 in the soil how can I fix this when all the nutes are around thatplease?? And these almost burnt but not burnt in colour crispy spots that crumble when you touch them have have appeared on the leafs could anybody tell me what this is down to thanks 🕵️♂️5y ago
1
1
Solved
heythere12345
Burned tip weird spots on the leavesI guess this is a toxicity right? Orange sherbet auto day 41Leaves. Edges burnt
Leaves. Color - Yellow
4y ago
2
2
Solved
inversi0n
Leaf tips browned. What nutrient problem is this?Leaf tips browned. And some signs of burn/discoloration at the leaf side edges.
Do you think it's general nutrients overdose? I didn't increase my PPM for the last two weeks, so I don't think it is a problem...
Or Potassium deficit? Or any other secondary nutrient deficit?Leaves. Edges burnt
Feeding. Deficiences
2y ago
4
4
Solved
BalconyWiTCH
Brown/burned? LeafAnyone could please help me figure out what´s causing this? Brown/burned? Leaf
I feed them water PH (6-7)
BioBizz BioGrow (3ml/L) and recently switched to the combo of BioBloo(1ml/L) m + BioGrow (2ml/L) since they are just starting to flower.Leaves. Edges burnt
Leaves. Color - Dark-brown
Other. General questions
5y ago
1
1
Solved
EmeraldLakeCannabis
Progressive yellowing on older fan leaves ~F14-F35Hi, past two weeks or so I've been noticing progressive chlorosis and eventually some necrosis starting from the edges of the leaves and working inwards.
Photos of this can be found in Week 18 Flower denoted by "For grow question #x 12/1"
Humidity low, could be related?
thx5y ago
2
Solved
southerngrower2020
Leaf damage and flower analysisAsking for thoughts on leaf damage. I think there may be nutrient shock so I will be reducing PPM to 800 to see if that helps. I am confused by other problems seen on a few leaves. I also want to ask if I am getting close to harvest (check flower pics) since this is an autoflower6y ago
4
3
Solved
BrenBlaze
Looking droopy/yellow due to light burn?Looking like light burn (most intense from the top) and maybe overwatering?
I am trying Nectar for the Gods #4 soil for the first time, and I just put it in a grow bag and put the clones in it. Unsure if I was supposed to prep somehow beforehand.4y ago
3
3
Solved
SilverSlapdick
Discolored leaves, rust spots, and burnt tipsBegan with burnt tips, followed by rust spots on upper leaves. Then top leaves of new flowers came in yellow, followed by bottom leaves developing gross pale spots. Not sure why, please refer to my super soil recipe as well as the one feeding I did in week 5. Underfed, pests, ph?4y ago
3
4
Solved
BigDaddyK
Leaves are browning , can’t see any ph or EC issues , roots look ok but maybe a bit brown , anyone got any thoughts ?Week 3
Leaves. Edges burnt
7y ago
6
6
Solved
Shockolateman08
Purple leaves and some tip burn, 6th week of flowerCan anyone tell me how I achieved this purple hue on #1? They're both the same seed from the same bag of weed. #2 has it's fall color while #1s leaves are pure purple, almost a blackberry color. I just wanna know so I can utilize this in an actual purple strain.5y ago
1
3
Solved
TigerLily4U
Having plant issuesPlant Issues, it all started when i sprayed for thrips i used spinosad soap. leafs turned yellow, with brown spots showing up, couple weeks later still going on top dressed, coulple weeks later still going on so then i just started watering and still nothing has changed,Leaves. Edges burnt
5y ago
2
5