The Grow Awards 2025 🏆

Chat

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

Recommended

Back to Grow Questions

Yellow spots, any help ?

Hiddendragon420started grow question 5 years ago

I've got yellow spots appeared on leaves and stem I am wondering if anyone can help identify what this is would be great thanks.

Hiddendragon420

Hiddendragon420

Hiddendragon420

Open

Leaves. White powder

Leaves. Color - Yellow

likes

Answer

Hiddendragon420answered grow question 5 years ago

Ok cheers bud, always on top of of the pH as hydroponics.

likes

Complain

SwedishChefanswered grow question 5 years ago

idk what the yellowing is but you need some magnesium. It could be a PH problem, 5.5-6.5 is the optimal range for cannabis.

likes

Complain

Similar Grow Questions

Solved

Yellowing and dying leaves Hi. What's wrong with it? With my previous grow I was getting exact same problem. Now, with the new plant, I'm starting to get same early symptoms. It starts with twisted leaves. Then the leaves start yellowing from the bottom and die.At flower stage the symptoms gets very severe

Leaves. Curl down

Leaves. Twisted

Leaves. Color - Yellow

7 months ago

3

2

Solved

Foxtailing Yellow Leaves White Trichomes - WHAT HAVEW I DONE?!Hi! It's my first grow and I thought I was Doing alright. After I've bought a tent, seems like things got worse. My flower is an auto in week 13.4 (supposed to take 9-10weeks) and I'm flushing since about 10 days. Still the trichomes are pretty clear. What should I do?

Leaves. Dropping off

Leaves. Color - Yellow

Setup. Strain - Autoflowering

8 months ago

1

1

Solved

Thoughts on leaf symptoms? The other plant in tent is doing same thing,but plant in other tent getting similar feed not. see diaries for more pictures K deficiency? Hard to believe that can happen in 65-gallon pots.Are getting big though.New growth tips looked yellow,hit them with water-soluble K and the new growth edges seemed get green.Some toco-ing, humidity is kinda high. Too intense light(800 ppfd), not enough C02 maybe?

Leaves. Edges burnt

Leaves. Color - Yellow

7 months ago

1

3

Solved

2 autos with crispy feeling sad looking leaves, how can I help them? (more info in diary pl & crit)2 of my autos have been growing leaves that feel crispy and look deformed. I have been watering when the top 5 cm of the soil dries, but I fear maybe I fed them too much nutrients. The temp has also been on the high side (30C 80F). What could be wrong and what can I do for them?

Leaves. Curl up

Leaves. Color - Yellow

7 months ago

8

5

Solved

Lower leaves too pale or yellowing?I am noticing the lower leaves of my Royal Critical Automatic to be much more pale green than the top of the plant. Is this a nutrient/light/watering/lst stress problem if at all? First Grow. Started balcony, moved to tent D23. SF-1000 light, 100% at ~ 55cm from canopy.

Leaves. Color - Yellow

Techniques. LST

7 months ago

2

2

Solved

Leaf Issues Hey all, my almost 5 week old Moby dick auto flower is starting to show some issues in the first week of flower. She got a dose of Veggie nutes 5 days ago, and a little bit of Bloom yesterday trying to fix it. Temps have been high and humidity low, would that cause this?

Leaves. Color - Yellow

7 months ago

1

Solved

Leggy Seedling Recovery attempt Plant got leggy. Lowered 100watt vivosun grow system light. DLI is now at 40 with 20hr on cycles. Plant dropped into final pot so soil could support weak thin stem. Watered recently and leaves got more yellow. On day 4 after recovery attempt. Any advice? PH 6.2-6.5.

Leaves. Veins - stay green

Leaves. Color - Yellow

7 months ago

6

3

Solved

Yellow on leaves Day 13 leaves started to look yellow / dull on tips hasn't seemed to improve 2 days later, it is the auto soil premix I'm guessing the roots are getting close the soil and nutes kicking in or does this look like another issue?

Leaves. Color - Yellow

7 months ago

2

1

Solved

Issues with 1 plant not the other (flowering)2 plants treated identically. One has started to have serious yellowing / bronzing on new growth. The other is fine. Any advice welcomed. :)

Leaves. Curl down

Leaves. Veins - yellow between

Leaves. Color - Yellow

7 months ago

3

6

Solved

Advise to flush or feed in Veg Does this is look like a nute burn, deficiency, or ph problem? The two plants that are growing a tad taller have had yellowing tips some curling downward. Don’t want to overreact and cause it to worsen, they’re looking healthy otherwise. Any advise whether to flush or feed?

Leaves. Curl down

Leaves. Color - Yellow

7 months ago

4

Solved

Excess or Defiancy?Some leaves from the top of my biggest plant, Frisian Dew, turn yellow and brown. The others don't show this behavior. The plant is in week 22 and still needs approx. 4-6 weeks until harvest. The plant pot is fully rooted up to the surface.

Leaves. Tips - Burnt

Leaves. Color - Yellow

7 months ago

2

3

Solved

White spots on a few leaves Any idea what these whitish yellow spots are? They appeared overnight. I'm growing in ffof with perlite and ewc. No nutes added yet, just bush doctor cal mag at half dose 3 days ago with great white, recharge, and photosynthesis Plus which was the last watering of 1.2 liters.

Leaves. Color - Yellow

Leaves. Other

7 months ago

2

2

Solved

KurtThePlantGuru

Is this a deficiency or burn?I have 2 new, 2 week old seedlings in my grow room and the bottom first set of leaves is yellowing at the tips to like half way up. Their not as green as the new growth.

Leaves. Color - Yellow

7 months ago

1

Solved

Should I do full flush til runoff is 300ppm?So, it is obviously a deficiency, which probably caused by a lockout. Will the full flush solve it? Yesterday I fed her a full dose of flowering nutes. Including K. It didn't change much. Lower fan leaves continue to go yellow. Today 3L water, pH:6.2, runoff:0.6l, ppm:1450, Ph6.0

Leaves. Color - Yellow

7 months ago

4

3

Solved

Buon giorno weed doctors, did anyone have similar uniform chlorosis at the top or maybe knows what's up? What could be the reason and the solution? Th Is this some sort of immobile nutrient deficiency or excess? Could this be caused by heat and light stress? She is 80cm tall and almost touches the lights in the tent. I'm usually suffering from Calmag and Nitrogen issues and haven't yet experienced yellowing from the top. Thanks

Leaves. Color - Yellow

Plant. Too tall

Feeding. Deficiences

7 months ago

2

2

Solved

Flecken auf den Blättern Hi Leute kann mir jemand bei meinem Problem helfen . Wie bekomme ich das wieder hin ? PH ist immer bei 6-6.2 Luftfeuchtigkeit schwankt zwischen 55-68% Nährstoffe : das grand Master Schema von Advanced Nuttient

Leaves. Color - Yellow

7 months ago

1

Solved

Starting to yellow So I had good growth up until 2 days ago when the one plant started to yellow. I had them going 24 hours a day and I got grow dots mixed in the bottom two thirds of the pots. Could this be light stress? or could it be hungry?

Leaves. Color - Yellow

7 months ago

1

7

Solved

Nutrient Deficiency What Deficiency’s are these ?? Using Coco+Perlite with earthworm castings and feeding with Fox Farm Nutes following the feeding schedule with CalMag every time I water at 6.2-6.5ph every other day. 1000ml of water per plant. All four clones have been fed the same since I got them

Leaves. Color - Yellow

Leaves. Color - Dark-brown

7 months ago

4

Solved

LilCeeDaWeedGod

Help! Discoloration in second set of true leaves Yo! A lil help please. On about day 19 with this DBHP and just experiencing some discoloration on the second pair of true leaves. I was told by the breeder that she is a magnesium whore and have been supplementing every other watering. Just trying to diagnose early.

Leaves. Curl down

Leaves. Color - Yellow

7 months ago

5

5

Solved

Please Help?Seit 7 Tagen in der Blüte. Mangelerscheinungen? organic grow

Leaves. Color - Yellow

7 months ago

2

4