The Grow Awards 2026 🏆 
Calcium deficiency?
TheGourmetWeedstarted grow question 5y ago
I've been using calmag on the grow, so it shouldn't be that. Any ideas?
Open
Leaves. Color - Mottling
likes
Answer
The8thChevronanswered grow question 5y ago
As always, check your pH levels before trying to fix any nute issues 👌
likes
Complain
The8thChevronanswered grow question 5y ago
What stage are your plants in?
If in mid to late flower, I would say you're using too many bloom nutes and locking out calcium that way. Seems to be a common problem.
likes
Complain
Similar Grow Questions
Solved
ProfessorSkiSlopes
Hi there, does anyone have any idea what the slight mottling is on the leaves of two of my plants. There are close-up pictures under Day 27 in Week 4. The discolouration is present across multiple leaves, but seems to only be happening to two plants out of 8. Thanks!Week 4
Leaves. Color - Mottling
7y ago
1
1
Solved
Kwczekus
Nutrients??Nutrients suggestions. Why are they showing some problems already? Why are the stems purple?Leaves. Color - Mottling
3y ago
2
3
Solved
HydrokronicZA
Nutrient deficiency or surplus?Hi Guys will post a pic shortly. Have to update the grow as we are actually heading into week 6. One of the white widows is a fair bit smaller than the other. And is showing some form of difficiency or nutrient burn. I think it may be due to to little phosphorus. Opinions?6y ago
4
3
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
JinksyGrows
Need advice as soon as possible. Please see last few pictures of DoSiDos week 3. Am I looking at mottling here? Soil ph maladjusted? Please help if you've seen this before, and what steps do it take moving forward (or am I paranoid, IDK). Thank you!Week 3
Leaves. Color - Mottling
6y ago
7
3
Solved
WhackyTobaccy
Help with weird deficiencyBCN is starting to show some form of deficiency. Given that it's in its 9th week, we are debating whether we should finish with a flush and harvest or try to fix this. Can someone please give their advice and opinion. Have attached a picture of the trichomes, not perfect though.Week 9
Leaves. Color - Mottling
6y ago
1
2
Solved
Acedily
Damage, Deficiency or MaturityTurned her around, on leaves at wall, lower, one of first stems. From bottom up. Didn't clean drip pan when should, used molasses, was fermenting. 8/9 weeks in flower. Scoped, the leaves are browning. Nothing on the leaf, like mold. Damage, deficiency or maturity?Week 8
Leaves. Color - Mottling
5y ago
3
2
Solved
kakanero
Does anyone know what happened on the leaves and how to cure it? See the last photo. Thaks!Week 8
Leaves. Color - Mottling
7y ago
1
2
Solved
Reefer_Chiefer1024
Leaves turning brown from center outAnyone know what is causing this on the leaves?Week 10
Leaves. Color - Mottling
4y ago
5
Solved
sweetkaya
Calcium Deficiency?Some days ago i noticed what i think is a Calcium deficiency because i cut the CalMagXtra on day 14 when i started giving the base nutes. So I re-added it in the mix and adjusting the pH at6.0 but the plant is not recovering andnow even the 2°plant is showing that signs. Help pls5y ago
2
Solved
ValleoGrow
Hey i noticed some wierd brown looking spots on some of my flowers, what could this be?
See photo Day 68 week 9Week 9
Leaves. Color - Mottling
6y ago
5
3
Solved
DrDank22
What might be going on with her? In Ocean Forest soil just water so far no nutes.Week 4
Leaves. Color - Mottling
7y ago
2
6
Solved
Cali_Grown_420
Calcium Deficiency Won’t Go Away DWCSo plant #1 is still having some Calcium deficiency issues. I’m using RO water and giving the recommended dose of CaliMagic which is 1tsp(5ml)/gal. I’m in DWC and using LED full spectrum lighting. Why can’t I stop these spots? Should I give more than recommended dose of CaliMagic5y ago
6
5
Solved
Organicweed
Can i please get some input from my fellow growers.Hello my fellow growers. i woke up today and went to see my lady's (4 x critical orange punch autoflower). and i saw a problem with my leaves, they are looking sick. i hope someone can help me with this issue cause i dont want to lose my beatifull lady's.Leaves. Color - Mottling
3y ago
11
5
Solved
Reefer_Chiefer1024
What is causing this on the leaves?Brown spots in the veins on the leaves/veinsWeek 9
Leaves. Color - Mottling
3y ago
1
2
Solved
HAPPYWEEDS
IMPORTANT excess/deficiency? What's happening? Flowering is in dangerWhat's happening here? I think it could be Fe deficiency, Mn deficiency, S deficiency or maybe K excess. But I'm not sure about diagnostic and I think I can have more than one problem. Please help, I don't know how to solve it and I see how flowering is very slow and weakLeaves. Color - Yellow
Leaves. Color - Pale
Leaves. Color - Mottling
4y ago
6
7
Solved
D42ONubie
Need help! Nutes, light, or something else going on..??First grow, indoors. Candy Kush Auto currently at 8wks, flowering. Been going smooth up until 1wk ago. Now lower and mid fan leaves yellowing, browning, top leaves turning purple and look wilty, stems also deep purple color. Come this far, don’t want to loose herLeaves. Veins - yellow between
Leaves. Color - Mottling
Plant. Stem - Red or purple
4y ago
1
1