The Grow Awards 2026 🏆

Back to Grow Questions

Yellow stains lower leaves

jeanpavelstarted grow question 6y ago

I saw some yellow stains on the lower leaves, not many, like on 2-3leaves. I already removed them but i dont know which is the cause or how should i act. Can you please provide me some more info? Thanks!

jeanpavel

Solved

Leaves. Color - Yellow

likes

Style_weedanswered grow question 6y ago

Ciao amico!! Che nutrimenti dai alla pianta?? È successo anche a me da poco.. Prima si son formate le macchioline e poi le foglie sembravano artigli con le punte girate in giù... E ho capito tutto quando ho misurato l'EC (conducibilità elettrica) dell'acqua che usciva dal sottovaso della mia pianta che era altissimo 1100ppm... Annaffia per le prossime 2 volte con sola acqua con ph regolato e vedrai che non ricapita!!!

1 like

Complain

Selected By The Grower

sciurcavaliereanswered grow question 6y ago

Might be too much water.

likes

Complain

jeanpavelanswered grow question 6y ago

Can you plese explain what is EC or how should i measure it? thanks!

likes

Complain

MadeInGermanyanswered grow question 6y ago

Hi buddy it would have been better to take pictures of the leaves :-) your plant looks great, how high is your ec?

1 like

Complain

Similar Grow Questions

Solved

Yellowing of leaves I am in my 8th week now 3red week of flowering, the bottom leaves are turning yellow, it started with brown spots now going yellow, I water only when soil is almost dry, I weed it with nova grow I did ad some calcium aweek back when leaves got spots thinking it's a calcium defici

Leaves. Color - Yellow

6y ago

3

7

Solved

the plants're killing the lower leaves They're growing BUT...the plants're killing the lower leaves.I don't understand why,this has been happening since parasites attacked them.Then when the parasites were gone and slowed for a while the leaves were dying.I put neem oil back on it (to prevent pests)and it started gain

Leaves. Color - Yellow

2y ago

6

Solved

Leaves getting light green to yellow Why they are getting light green to yellow? to less nutrients?

Leaves. Color - Yellow

6y ago

2

2

Solved

Yellow twisty tips Thinking either light or nute burn. It's growing like this for a week, doesn't seem stunted. Growing in biobizz light mix, only added activera/calmag to water since day 1. pH 6,5 solution = runoff Temp sometimes peak to 28C, but average 26-27C, lights are at 50 cm (100W led)

Leaves. Color - Yellow

4y ago

3

4

Solved

Spots on leaves and little twisted...Spots started slowly showing when it had a different 600w light, too much heat back then, this started a little "save operation" changed light, made the plants look a bit healthier but now it looks like the spots have spread and also affected the leaves above... Are they healthy?

Leaves. Twisted

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

1

5

Solved

Ph ?Help please. I’m useing ph perfect coco grow A&B in my first bubble bucket grow and my ph keeps rising over night My plants are two weeks old and very yellow any thoughts please. Thank you

Leaves. Color - Yellow

Setup. Strain - Autoflowering

5y ago

1

2

Solved

Please help. Last plant died exactly like this. Yellowing drying leaves from the bottom on all fan leaves while shoots get stunted / eventually affected.Transp recently from 1g > 5g. Seemed ok at first day after (no wat) then leaves started rapidly yellowing / drooping. Tent is fairly small 40x40x120. Could it be the heat ? Also took out humidifier but still in same room tent vents. Is Canna Pro Plus watered between 5.8-6.2 ph ?

Leaves. Tips - Burnt

Leaves. Color - Yellow

Plant. Stem - Red or purple

5y ago

5

8

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

Is this a deficiency or some form of toxicity (autoflo/cfl 125w/ led 300w)Hello guys i'm a new grower, I have 2 plants one Purple Queen Auto and one Northern Lights Auto. On the lowest 2 leaves of the purple queen there is this thing (picture) It is only there on one plant only and they have the same water each time (1L) Do anyone know what i'm facing

Leaves. Tips - Burnt

Leaves. Color - Yellow

Feeding. Deficiences

5y ago

1

1

Solved

Upper leaves are yellow and not smooth I noticed leaves on top are closing and today are yellowish. Older plant aren’t stretching more, I thought it’s too much light or too hot but it’s kinda weird because light are at 40cm from longer plant and 50 from smaller, temperature are max 26C. So, it’s normal?

Leaves. Veins - yellow between

Leaves. Color - Yellow

2y ago

3

Solved

Burned leaves.Is this heat stress or nutrition related

Leaves. Edges burnt

Leaves. Curl up

Leaves. Color - Yellow

2y ago

7

6

Solved

Am I overwatering these seedlings? (Coco Coir) Please help, Thank you :)These seedlings are about 3 weeks old in Coco coir. I PH the water to 5.8-6.2 everytime. I was watering every 1-2 days as the top soil dried out. Have I been overwatering? How much/often should I water them at this stage and should I wait for them to perk up before transplant?

Leaves. Wilting

Leaves. Color - Yellow

4y ago

1

Solved

Late bloomer?One of my plants hasn't started flowering yet (front right) but otherwise looks to be healthy bar a couple of lower leaves yellowing and drying up ?

Leaves. Tips - Die

Leaves. Color - Yellow

Plant. Other

5y ago

1

1

Solved

Deficiencia de calmag/nitrogênio?Boa noite, o que se passa com ela? Deficiência de calmag/ nitrogênio? Também tem estado muito frio pra strain Gorilla, será que se vai aguentar? O pH do runoff está dentro do intervalo. Tenho esperado quase uma semana entre regas porque a temperatura com luz ligada ronda os 20°

Leaves. Color - Yellow

Feeding. Deficiences

4y ago

1

1

Solved

confectionerbuddha

yellow Tips is ther any huge concern about a yellow dot on one of the tips of my seedlings leaf. Im growing in organic living soil and watering with Ph 7 tap water, it is a canuk cookies auto seedling

Leaves. Color - Yellow

5y ago

4

4

Solved

Quickly yellowing leaves, stunted growth for 10 days Ooph I need help again. My plants are starting to yellow –– quick. They were a bit pale about 12 hours ago, now they're totally yellow. I haven't watered in 3 days yet the soil is still damp (not wet), but about 30% perlite. Organic potting mix, no nutrients added. Water pH 6.5

Leaves. Color - Yellow

6y ago

3

4

Solved

Hi, I thought it was over feeding but now I’m not sure 🤔 I took new pictures from the stamp if someone can help ✌️💚

Leaves. Curl down

Leaves. Color - Yellow

1y ago

6

5

Solved

Can I fix a nitrogen deficiency with more terra tripart nutrients or do I need something else?My Double Grape is showing signs of what looks like a nitrogen deficiency. My Ph is 7, temps 25c, humidity 40% and watering 1l every 3rd day. Does anyone know if I can increase my nitrogen my adding more of either micro, grow or bloom from the terra tripart range?

Leaves. Color - Yellow

Feeding. Deficiences

2y ago

6

2

Solved

Here is something that i have spotted in this growth as well i know its not bad but i m trying to understand why its happening. Like my previous growth the very first 2 notes always turn yellow on the tips. Why? P.S. Soil is brand new out of the package.

Leaves. Color - Yellow

7y ago

2

2

Solved

does this need more CalMag/ K?im not sure what this deficiency is. im currently feeding them about 0.8ml/l Biobizz CalMag, pH around 6.5-7, RQS Easy bloom at half strength which is what they recommend for autos

Leaves. Color - Yellow

4y ago

3