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
Noob grower
Misanthropestarted grow question 4 years ago
Gorilla Bomb, outdoor grow, directly in soil, Miracle Gro 20-20-20 once per week. In the past few days, leaves have developed brown to black spots that start at edges and spread inward. I have 1 Green Crack under identical conditions and another GB and GC in outdoor pots
Solved
Leaves. Color - Dark-brown
likes
typhoniananswered grow question 4 years ago
You got some yellowing and leaf crawling too. Cut back on that gro, go light on it. Just water them for a week, there in soil so you’ll be fine. I would also start ph balancing your water, go easy on that gro. Good luck.
Misanthropeanswered grow question 4 years ago
I've got 3 other plants under the same conditions that are the picture of health, wouldn't they also show similar leaf damage if it's a nutrient imbalance?
likes
Complain
Aqueminianswered grow question 4 years ago
That's a pH balance problem 100%. The soil it's in needs to be adjusted. Start ph balancing your water to 6.2 for every feeding or watering.
likes
Complain
Robertsanswered grow question 4 years ago
Nutrition inbalance. Vegging requires a ratio of 3-1-2 npk. Flowering is 1-2-3 ratio. Probably has the soil ph out of alignment too. Would be worth looking into as well
likes
Complain
Similar Grow Questions
Solved
Misanthrope
Noob growerGorilla Bomb, outdoor grow, directly in soil, Miracle Gro 20-20-20 once per week. In the past few days, leaves have developed brown to black spots that start at edges and spread inward. I have 1 Green Crack under identical conditions and another GB and GC in outdoor potsLeaves. Color - Dark-brown
4 years ago
4
Solved
Bembeto
Carencia de MgHojas en forma de bandera con manchas amarillas, sin dudas carencia de Mg, el problema es que no se que lo provoca, haré un estudio de acidez al suelo para estar seguro, pero dejo el hilo abierto a cultivadores más experimentados por si me podrían dar una mano con estoWeek 9
Leaves. Color - Dark-brown
4 years ago
4
5
Solved
torgul2000
Banana Blaze brown spotsSoil was missing for my Banana Blaze, I used some general soil.... but I now have some brown spots on the leaves.
Any idea of what is occuring ? I changed form 1L pot to 3.5L pot and stuffed the pot with half general soil...not a good idea I know :-/Week 6
Leaves. Color - Dark-brown
4 years ago
4
3
Solved
Coconut_kiss
Rusting leaves since week 9Affected leaves on top. Rusting leaves,some have purple stems,week 10 check out diary for more info
also some bottom leaves have been dying offLeaves. Color - Yellow
Leaves. Color - Dark-brown
4 years ago
1
2
Solved
dataTwiiix
Brown area on leavesBonjours à tous. Voilà certaines feuilles de ma plante deviennent attrape des tâches brunes. J'ai donné du GHE essential (oligo-éléments) and cal magnifique (0,3ml/L) ce matin ainsi que du biographie Bloom. Je pense à une carence en magnésium et vous qu'en pensez-vous?4 years ago
4
2
Solved
Maggie_de_Block
Discoloration bud leavesAnybody know what this discoloration is? Humidity was a bit too high so I'm hoping not some type of mold. The affected buds did get quite a lot of wind and light, so it might be light- or windburn? Any help appreciated!Week 11
Leaves. Color - Dark-brown
4 years ago
3
4
Solved
munchiesart
Do you think this is a toxic condition, a Ph deficiency or a sign of deficiency?My G13 showed signs of illness after my last watering. Day 105. I added İn my last irrigation 12ml Micro-6ml Grow-18ml Bloom-6ml Molasses-1.5ml Bloombastic-2ml B52 to 4 l. of water. I've kept the pH in the 6-6.5.(PPM1500)
Please help me save this girl at once :( Thank you.Leaves. Edges burnt
Leaves. Curl down
Leaves. Color - Dark-brown
4 years ago
3
5
Solved
Averynate
Brown Rusty DotsWhat are these brown dots on my plants? They are only on one of the plants, they have gotten a spray with Dr. Zymes Eliminator and had no effect, also did a mL of Cal Mag in its last water with no effect and getting worse. I’m not sure what this is and I can’t get it to go away!Leaves. Color - Dark-brown
4 years ago
2
3
Solved
AUTOASSASSIN215
Heat stress or Root rot ??Hey my 7 month old plant not doing too good the leaves are turning brown and crispy Might be heat but then again Might be bud rot and it’s spreading like wild fire also i notice not a lot of flowering growth idk weather to chop it down or keep fightingLeaves. Tips - Die
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4 years ago
2
Solved
MagicChelseaCrew
Lower Leaves turning brownIs this a nutrient deficiency? It's only on the lower leaves of both plants.Week 2
Leaves. Color - Dark-brown
4 years ago
1
2
Solved
leoen2
Lemon Ice 2.0 - Browning leaves Weird GrowthAnyone got an idea what may have caused the weird looking lemon ice to grow like that? I'm guessing a fungal infection or mold, which is weird tho cuz all of them got the same exact feed, time in the plugs etc. Basically its odd because it only affected one (thank fuck), ideas?4 years ago
2
3
Solved
Stixere
LeavesWhat can be wrong and what should I do?Biobizz fertilizers(Grow, Bloom, Topmax). 6 weeks.Leaves. Color - Yellow
Leaves. Color - Dark-brown
4 years ago
2
Solved
Backstabbath
What deficiency is this?Can someone tell me what this is being caused by? My suspicion is a potassium/ calcium deficiency? It's affecting mostly the larger fan leaves. Also, affected leaf stems are turning purple. Posted a pic of one of the leavesWeek 6
Leaves. Color - Dark-brown
4 years ago
3
