The Grow Awards 2026 🏆

Back to Grow Questions

What is this?

Highway93started grow question 4y ago

Jemand helfen?

Highway93

Solved

Leaves. Color - Yellow

likes

KushGANGanswered grow question 4y ago

Hello it seems you have potassium deficience and/ or calmag deficience it will be easiest to tell it if you put a photo whithout the purple light. Hope this helps you. Good luck

1 like

Complain

Selected By The Grower

Similar Grow Questions

Solved

Is this overfeeding or another more complex problem This is my first Automatic plant culture. I've made some novice mistakes, such as topping the plants. They start flowering about 2 weeks ago, but the leaves are turning yellow with some brown spots. I feed with an old Nutrient I had here. Can that be the problem?

Leaves. Color - Yellow

6y ago

1

1

Solved

What can possibly be wrong ?Still can’t Figure out why my plants turn yellow in coco. This is what I feed: 2ml flora nova grow 2 ml cal mag 1.5 ml Superthrive 3ml Rhizotonic 2ml dark energy 1 scoop per 10 gallon great white Temp 78-81 Humidity 60-75% 18/6 lights What the heck am I doing wrong?

Leaves. Color - Yellow

5y ago

2

3

Solved

Is this Stating something or is it paranoya I had a few leaves that were turning yellow, but they are lower leaves that are slightly yellowish on the outside, generally the plant has become a little lighter since it started flowering. Am I worrying too much? pictures were taken directly in the morning

Leaves. Color - Yellow

1y ago

4

Solved

What can i buy to help these plants What can i buy to help this plant get better. I am in the beginning of flower and one seems to have a calcium deficiency or nitrogen. Ones stupid and the other 2 are okish

Leaves. Twisted

Leaves. Color - Yellow

5y ago

4

Solved

First grow first problem Double grape mephisto. In week 5 veg. Ffof & ffhf . Gave first light feed of GH trio + calmag 3 days ago this developed day after feed. Purple stems and yellowing leaves. Looking for guidance. I'm thinking nitrogen def. Or mag def but I have no Pryor exp to base this. Thoughts?

Leaves. Tips - Die

Leaves. Curl down

Leaves. Color - Yellow

1y ago

3

Solved

Yellow leafs Hello i cant figure out what was happend with my plants ph ground 6.4 TDS 800 They gettin yellow,iv thinkin its overfeed but now i think its deficiency of something...i flush them on monday and i want put next week Alg-a-mic from Bio Bizz its for deficiency,overfeeding etc. Help

Leaves. Color - Yellow

Feeding. Other

6y ago

1

Solved

Dried/yellow leaf extremity, can’t find what it is on the excess/defiency chart -Soil : Light-Mix Biobizz (baltic peat, white peat, black peat, sphagnum, compost, NPK 12/14/24, pH 5,5- 6,5, EC 1 -1,25 mS/cm) -Nutrients : none -Light : 18h at 40cm from a 65W dimmable LED board -Water pH : tool broken, I don’t know the pH of my water… -22°C /47%

Leaves. Color - Yellow

5y ago

1

1

Solved

deficiency or normal?Have some yellowing leaves and only a couple with brown spots, it's not all over but each day I think it's getting a little more, I'm thinking calmag deficiency?

Leaves. Color - Yellow

2y ago

6

Solved

Leaf spot Hey, noob here. I have this Seedsman Lemon Auto with a spot on its leaf. I wanted to diagnose the issue asap if there is one. what are your opinions? Thank you and happy growing.

Leaves. Color - Yellow

6y ago

1

1

Solved

Help I need help my plants are changing colors brown like dying. What am I doing wrong I water them, I recently brought some Fox Farm Products,( Tiger Bloom, Big Bloom, And Grow Big). I haven't used them yet because I think it's still too early. Any advice would be greatly appreciate.

Leaves. Color - Yellow

3y ago

12

7

Solved

Potassium and Calcium deficiency?Both plants are autos on day 49 after sprouting. Plants didn't get any fertilizer during veg. I noticed deficiencies about 2 weeks ago, and added BioBizz Bio-Bloom, Top-Max and CalMag to next waterings. Planning to alternate water and feeding for the rest of the grow. any advice

Leaves. Tips - Burnt

Leaves. Color - Yellow

Setup. Strain - Autoflowering

1y ago

2

3

Solved

Neon green leaves - N deficiency ? -pics in the link below Here's the link to other question from yesterday= https://growdiaries.com/grow-questions/43533-using-same-nutrients-for-different-strains--but-some-has-some-deficiencies-neon-green-leaves Measured the EC too today EC:1.2-1.3 PH:6.2 PPM: 500-600 Any suggestions what should I do?

Leaves. Color - Yellow

Leaves. Color - Pale

4y ago

2

3

Solved

Yellow canopy Nutrition deficit?Hi guys can some one help? Is this magnesium or iron deficit? Or smth with roots?(canopy is yellow) Ph of soil was almost 5.8/ 6 smth I had some days a bit heat about 27 /29 degree but the plant next to it looks great they both got some biobuzz grow 4 days ago

Leaves. Color - Yellow

2y ago

3

4

Solved

TheProfessorGrows

Deficiency help/fix?Deficiency my plant is exhibiting has progressed. I checked PH repeatedly, and it does not seem to be a ph issue. Gave Gaia Green nutes 2 weeks ago and nothing else since but fish shit with waterings. Had watering issues earlier in grow not sure if that’s the cause. Any tips/fix?

Leaves. Color - Yellow

3y ago

2

2

Solved

Nute issue or Energy allocation?yellow leaves,purple trunk low nitrogen possibly ?everything else checks out, Ph,ec, water temp, air, humidity etc, roots have nute stain, no slimy or smelly roots or bugs res changed a week ago. should I be concerned? Any ideas on what's causing it ? Thanks in advance

Leaves. Color - Yellow

Plant. Stem - Red or purple

4y ago

3

4

Solved

Yellowing Leaves I'm concerned my plant may be prematurely yellowing. I've added Cal-Mag to see if that would help with the yellowing of leaves, but the issue persists. Yellow leaves are moving progressively higher up the plant, but my other strain is not presenting same problem. (See Post)

Leaves. Color - Yellow

4y ago

4

4

Solved

Yellow sugar leaves I am waiting for a low-THC strain to develop amber trichomes and I found two buds with these yellow sugar leaves. There is no bud rot, should I wait longer to harvest? Also, do CBD strains develop amber trichomes, or should I harvest now? Additional details available in growdiary

Buds. Other

Leaves. Color - Yellow

1y ago

1

5

Solved

Sam_The_Herborist

Yellow dots on the leaves Hi guys I need your opinion I noticed some yellow dots on some leaves of my plants and I wanted to know if it can be caused by too much light or too much nutrient Or maybe it's just normal and I'm just paranoid XD I circled the dots that I'm talking about Thanks you !

Leaves. Color - Yellow

5y ago

1

2

Solved

Leaves Any idea what this could be?

Leaves. Color - Yellow

5y ago

2

3

Solved

Bottom leaves turning yellow Hi guys,could you please tell me what can be wrong with the plant ? Bottom leaves turning yellow

Leaves. Color - Yellow

5y ago

2

7