The Grow Awards 2025 🏆 
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
Light burn or nutrients lockout?
Jerma_growstarted grow question 4 years ago
Is this light burn? The light is a sf1000 dimmed at 60% and 65cm away from the tops. It’s around day 40 of veg I am using bio tabs so if it’s over feeding I can’t change anything. But it’s only the tops leaves that have yellow tops. Light burn or nutes problem?
Open
Leaves. Tips - Burnt
likes
Answer
cannavicianswered grow question 4 years ago
its not light burn, add calmag and will be fine in 2 weeks
likes
Complain
JUNGLE_B4RNSanswered grow question 4 years ago
EC level of the soil might be a bit too high, probably because you’re not pouring enough water during watering. Try to get about 20% of drain from the pots.
likes
Complain
Similar Grow Questions
Solved
Fatnastyz
P lock out high ph. Do I soft flush, flush flush or add something like epson to bring ph down?14 days ago I top dressed builda flower and 1/16th tsp build a bloom.
7 days later gave a tea 3 gallons water 1 tsp build a bloom and worm castings kelp. (meant to only do1/2tsp)
P lock out and soil run off was around 7.3. since the 22nd only gave water with yucca. fixed owaterWeek 5
Leaves. Tips - Burnt
6 months ago
3
3
Solved
MakeMeSleepy420
Light burn on seedlings?I have 9 seedlings that all seem to have light burn. The seeds are from good genetics, where my last crop went hermie from a light leak. AC Infinity 2x4 on 40% power at 18”. Thoughts?Leaves. Edges burnt
Leaves. Tips - Burnt
6 months ago
5
Solved
tuliobernardo
What may caused the issuesChecked the runoff and confirmed 6.2PH and 130 ppm on water.
checked on my Tank and same was happening.
so gave a 603 ppm solution of cal/mag. Grow A+B perfect pH connoisseur, H2O2 at 5.8 pH.
Will await for results.
i think at week 3 theyre supposed to eat at least 600 ppm?Leaves. Tips - Burnt
Leaves. Color - Yellow
6 months ago
2
1
Solved
Chief_Leaf
Why are the leaves tips curling dying and brown marks appearing?My Mac #1 showing brown spots/marks on leaves, with tips curling and dying yellow/brown - what is the problem? How do I fix this?
She is in week 5 flower.
Is it calcium deficiency? pH problem?Leaves. Tips - Burnt
Leaves. Tips - Die
Leaves. Color - Dark-brown
6 months ago
2
1
Solved
einamio
Weed doctors to the rescueDay 44, fb auto, my happy girl developed those dark spots at the top... Is this a Calmag deficiency? Although I'm giving her calmag every feeding. I think there are also first burnt tips. I'm about to water her tonight, what should or should not give her? Thanks for your inputs🙏7 months ago
3
5
Solved
GeminiCQC
Help with issues IDI have a photoperiod in a 5 gal using BAS light. It is currently day 3 of week 4 , and I'm getting some damage on the tops. Would this be light stress or another issue? The tips are starting to go light green. Using the 200 watt light for the 2x4x8 ac infinity tent.Leaves. Tips - Burnt
Setup. Strains - Photoperiod
Setup. Lighting
8 months ago
2
2
Solved
Peter420
Leaf coloring and dotsHey guys, what do you say about the leaves of the plants? I'm starting to get worried because it's affecting more and more leaves of the plantLeaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Yellow
8 months ago
1
1
Solved
Namesnomnom
Upward curling leafs, burned tips, 2nd week of flowerSo I'm two weeks into flower now and my leaves are getting burned tips (I'm guessing nitrogen deficiency due to the light green of the leaves or some lock out) leafs are also curling upwards :/.
And some fading on some lower leafs.
Using biobizz roughly 10ml each
Any ideasLeaves. Tips - Burnt
Leaves. Color - Yellow
8 months ago
2
Solved
ceomi69
Leave Tips Yellow and Brown on New GrowthThe leave tips of my plants turned yellow and burnt after i gave them a bottled nutrient feed (organic). Unfortunately i failed to measure the PH of the Water (it was probably to high). This was one Week ago and the New Growth still show signs that something is wrong.Leaves. Tips - Burnt
Leaves. Curl down
Leaves. Color - Yellow
8 months ago
3
2
Solved
GrowAndSmoke
far too Lightburn/stressedHey gromies🤓 If got a big problem with my Mars hydro tws2000, its too powerfull for my ladysLeaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Yellow
8 months ago
3
6
Solved
KingMickey
Burning Edges/Yellowing and Drooping?The yellowing has gotten worse and I'm noticing slightly burnt tips/edges and some droop. Could this be burn/deficiency or over/underwatering? A combination? Is there anything I can do to fix this early or is it just a matter of giving them some time and less nutrients? Thanks!7 months ago
4
2
Solved
GrowAndSmoke
experienced growers are in demand😵💫💡Hey volks 🙌 I'm trying to grow 3 different grow phases in my 4x4 tent, but getting too much problems with my light.(Mars Hydro TSW 2000) its too strong for my little plants. Can you give me same advice about hight/intensity?
Thanks alot and happy growing🌱Leaves. Tips - Burnt
Setup. Lighting
8 months ago
2
3
Solved
Dippp
Problem with plants in the 3rd week of vegetation.Hello everyone, I am new grower, in the 3rd week, I started having issues with the leaves. Does anyone have a diagnosis for this?
I am using I am using Advanced Nutrients (Coco Grow A and B, B-52, Voodoo Juice)
Coco Soil
Temp: ~26 C
Rh: 60-65%
Feminized seeds
Thanks :DLeaves. Tips - Burnt
Leaves. Curl down
Leaves. Color - Black or grey
8 months ago
1
Solved
JohnKomisch
My 8 to 9 weeks old Blueberry Zkittlez has these dry brown spots on some leaves. Should these remain on the plant? It happened on a really warm day and the substrate was really dry in the evening.The flowering began about two weeks ago. Any suggestions?Leaves. Tips - Burnt
8 months ago
1