The Grow Awards 2026 🏆

Back to Grow Questions

Leaves have turned rusty

shutupstevenstarted grow question 5y ago

Any ideas why is wrong with my Northern Lights Auto?

shutupsteven

Open

Leaves. Color - Dark-brown

likes

Answer

Robertsanswered grow question 4y ago

Guessing your ph was out of range and you suffered multiple deficiency signs

likes

Complain

Similar Grow Questions

Solved

Leafs turning gold/dark brown I have no idea whats wrong with it. I cant seem to catch a break even outside. It allways has to be my favorite plant. Any help is appreciated

Leaves. Tips - Burnt

Leaves. Color - Yellow

Leaves. Color - Dark-brown

6y ago

2

3

Solved

Thoughts?Can someone confirm the brown spots are a calcium issue, What are your thought on the brown tips?

Leaves. Edges burnt

Leaves. Color - Dark-brown

5y ago

2

Solved

Have brown spots on leaves and get it to stop!I can not figure out what this is I have tried treating for calcium deficiency however I can’t seem to shake it.

Leaves. Color - Dark-brown

4y ago

2

Solved

Plant dieing why I don't no what's going on... I tried flushing... Push the lights back further.... And gave them cal mag nothing fix the problem... Any suggestions

Leaves. Color - Yellow

Leaves. Color - Dark-brown

Plant. Wilting

6y ago

2

2

Solved

Some brown spots showing on the top sugar leaves. I suspect it is due to the cooling fan of the light blowing down hot air? I've adjusted the fans to blow air directly over the top of the main cola's and I increased the light distance.

Leaves. Color - Dark-brown

7y ago

1

1

Solved

girls are crying for help I had problem with my plants. i asked here and people said it was potassium problem. i gave just water with calmag. now they look more unhappy. do you guys have any idea?

Leaves. Color - Dark-brown

4y ago

5

7

Solved

IDEAS?! double cookies auto BSF Tuve exceso de N al comienzo de la floración, hice lavado de raíces y todo empeoró! ahora, a casi 1 o 2 semanas de finalizar la floración,ella se encuentra así.Luego del lavado de raíces, continue con fertilizantes normalmente igual que las otras y las otras están en buen estado!

Leaves. Color - Yellow

Leaves. Color - Dark-brown

Plant. Stem - Red or purple

5y ago

6

Solved

Brown spots on leaves?I have brown spots on one out of my 3 autos, it's mainly on one leaf. Does anyone know what this is? 450w via spectra LED 4gal pots coco & perlite 70% - 30% GH trio + calmag 1L each every day - 2.5ml calmag, 4ml micro, 1ml gro, 5ml bloom 6.2-6.5 ph [no runoff].

Leaves. Color - Dark-brown

6y ago

4

Solved

Aonjacktallbeck

Ph problem?Is this a ph problem or something else? My meter doesn’t seem to be accurate. I’ve been feeding top crop veg once a week and ph 6.3 (soil), my run off was a bit high, a gave just plain water (ph 7) but no help. Photos from two plants. Heeelp

Leaves. Color - Yellow

Leaves. Color - Dark-brown

Feeding. Deficiences

5y ago

1

1

Solved

Browning leaves? Did a soil slurry and dropped the water from 6.8 to 6.2. Does that mean it’s locking out? How should I go about fixing this? In peat pearlite and worm castings. Added about 6 cups of lime to the 20 gallons of soil thought that should have helped the ph?

Leaves. Curl up

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

1

Solved

make_weed_not_war

Yellow leafes with Brown circles So the Easy Bud in the tent Looks Like trouble. The Leafs turn yellow with brown circles… im clueless what It could be but it does not look Healthy. The Leafs at the deepest bottom Look Fine… All Others dont Look good..

Leaves. Curl up

Leaves. Color - Yellow

Leaves. Color - Dark-brown

2y ago

1

2

Solved

Emerging Issues - Week 9 At the beginning of the week, I noticed the tips of the leaves drying out. Now, one out of the four plants has completely yellow leaves. Could it be due to the increased Biobizz Bloom dosage? For more information, please check my journal. Regards.

Leaves. Color - Dark-brown

Feeding. Deficiences

3y ago

4

4

Solved

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

1y ago

2

1

Solved

Is this fungus infection or calcium deficiency?Plant seems fine overall but shows brown spots on some leaves (new and old). Week 4 bloom in soil. 3l rain water pH adapted + CalMag to 250 µS/cm. Crazy Hills fert. twice a week (EC 1600 µS/cm). Water pH 5.0, drain pH 7.4, drain EC 1400 ... 1500 µS/cm.

Leaves. Color - Dark-brown

2y ago

1

1

Solved

FLOGROWNDIARIES

Leaf browning My plant is growing a couple brown spots. Any idea what can be causing that and how I can prevent it from getting worse?

Leaves. Tips - Burnt

Leaves. Color - Dark-brown

3y ago

1

5

Solved

Yellow fan leaves, brown spots on upper leaves, some curling.Hi guys, I'm certainly having issues with my Amnesia Haze Auto feminized. At first the fan leaves on the bottom started going yellow, then after the flushing I did brown spots appeared on upper leaves. Please check the latest week of the diary and share opinions. Much Thx! <3

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

1

Solved

Black spots on leaves So I have those black spots on leaves on top of the canopy of my plants. Can someone please explain what are those and how can I treat it? Also the edges of the leaves on top of the canopy are brown and crispy.

Leaves. Color - Dark-brown

2y ago

1

1

Solved

No logro descifrar cómo arreglarlo - auto en DWC 4 semana y media desde el comienzo, ph 6.0, ppm 600, incluye nutrientes base+calmag+silicium+trichodermas. mismo problema durante toda la vegetación, en la 4ta semana incluí calmag y mas fertilizantes y pareció mejorar pero ahora vuelve a decaer. Sobre fertilización? deficiencia?

Leaves. Color - Dark-brown

4y ago

1

1

Solved

Browning tips and lower leaves Some leaves have a little brown on the tips, and some lowest leaves are turning yellow then brown, although I have been looking it up and it seems to be normal? It's not nutrient burn as I haven't given any. Any clues on what it could be or if I should be concerned?

Leaves. Color - Dark-brown

6y ago

1

1

Solved

Which deficiency could that be?Help me please to find out the deficiency of the Royal Gorilla Automatic 😳 4 Veg Week. Temperature 25-27 degrees RH 60-75 60% soil - 20% coco - 20% perlite Feeding Chart GHE FloraTrio pro 1 Gallon: 5ml CalMag 4 ml Micro 5ml Grow 1ml Bloom I did not spilt water on the leaves

Leaves. Color - Dark-brown

6y ago

1

1