Spots on my leaves


#1

What’s up

Continuing the discussion from How do I start a new forum post?:


#2

Probably calcium, magnesium, or manganese deficiency


#3

@Majiktoker hit him with a support ticket :v:️ I love seeing you guys diagnos the plants with problems! One day I hope I’ll be able to do the same.


#4

Yes sir I’ll go get it and post it back here, thank you for bringing to my attention, and dont worry bro, you’ll get it eventually in no time at all, time is of essence lol


#5

Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA

Strain; Type, Bag seed, or NA

Soil in pots, Hydroponic, or Coco?

System type?

PH of runoff or solution in reservoir?

What is strength of nutrient mix? EC, or TDS

Indoor or Outdoor
Light system, size?

Temps; Day, Night

Humidity; Day, Night

Ventilation system; Yes, No, Size

AC, Humidifier, De-humidifier,

Co2; Yes, No

Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but short, to the point questions and facts will help us help you smile


#6

Looks like Calcium uptake issues. My assumption is and outside grow, or was she taken outside for better picture?


#7

Calcium was my first thought as well, same with mangenese. Manganese deficiencies will cause Brown spots…gotta say I agree with you @Dumme


#8

pH, pH, pH…

The pH can absolutely cause calcium and magnesium uptake problems.

Also, as it is more likely outdoors, sometimes some spots can be caused by insect bites. Also lots of large “droplet” size spots, somewhat similar to the bigger spots here, these can be caused by foliar feeding in the sun, but there is enough of the fine “freckled” looking spots that I’d still lean towards a nutrient deficiency.

Happy growing,

MacG


#9

This post was flagged by the community and is temporarily hidden.


#10

Dude I swear that was my first thought too !? …I didn’t want to say it, I had leaf spot fungus, hope that helps
-good luck


#11

Yup, fungi is a possibility. But for any and all of these we’d need better pictures and more info.

~MacG


#12

Mine was looking the same way, but we’ve had 90 degree weather with 100 degree heat index. I flushed them with water for 3 straight days and they’re looking better.


#13

Can heat stress cause that type of spotting without the leaves looking dry?


#14

@Dirkb,

First up I welcome to I L G M… Visit the the lounge that’s where we get to know each other and tell some good jokes.

This is real large but I flet you needed to know everything about this.

Leaf septoria or yellow leaf spot is caused by Septoria cannabis and S. neocannabina, both of which are fungal pathogens, targeting cannabis in particular. It occurs on outdoor grown marijuana, triggered by warm weather and rain. It can also appear in plants lacking sufficient nitrogen. Yellow leaf spot will first appear on the lower leaves of the marijuana plant. The spots can range in color from white to grayish brown to yellow, first appearing as small round lesions. As yellow leaf spot matures, it takes on a pimple-like appearance, expanding in size.

Yellow leaf spot will damage the leaves and sometimes the stems of your cannabis plants, but will not kill the crop. However, if left untreated it will reduce yield. Infected leaves dry at the site of the spot, eventually crumbling and creating a hole where the spot began. Heavily infected leaves will turn completely yellow, dry up and drop off. If the fallen leaves are not removed, you have just created a landing ground for spores to overwinter. This means they lay low until warmer weather arrives which is when they do their damage. Yellow leaf spot spores rely on the wind, water and hitchhiking onto passersby for their travels.

Yellow leaf spot can be prevented from attacking your cannabis garden through crop rotation. This means choosing a different planting site after each harvest. If this is not possible, then once you have harvested a marijuana crop completely remove any evidence of the previous vegetation and till the soil well, removing all debris. Prepare the site with sterilized compost and work into the soil. This should provide enough nitrogen to give the new crop a healthy starting ground. In the event you have no available compost (every gardener should get into the habit of creating a compost pile) then add blood meal, fish meal or soybean meal to the existing dirt. This will provide the nitrogen needed for your cannabis. Be sure to sterilize all gardening tools with peroxide or rubbing alcohol before storing.

Another option when starting a new marijuana bed is to apply a fungicide to the planting site before adding seed or seedlings. There are various natural solutions you can either make yourself, or buy already mixed. Adding beneficial bacteria, such as Bacillus Pumilis or beneficial fungi such as Trichoderma will benefit the soil if you have no compost to incorporate. You can also spray the area with essential oil mixtures containing cinnamon, clove, coriander, neem, or sesame. Spraying the soil with compost tea or a baking soda solution can help to prevent yellow leaf spot spores from settling in the area.

Water your cannabis plants in the early morning or early evening. Water the soil, not the leaves. In so doing, the sun’s rays won’t burn the leaves. This practice should be adhered to no matter what you are growing.

In between harvests, if yellow leaf spots find your marijuana patch, the fungus can be controlled in several ways:

Physically remove all affected leaves and destroy them. Do not add Leaf septoria or yellow leaf spot is caused by Septoria cannabis and S. neocannabina, both of which are fungal pathogens, targeting cannabis in particular. It occurs on outdoor grown marijuana, triggered by warm weather and rain. It can also appear in plants lacking sufficient nitrogen. Yellow leaf spot will first appear on the lower leaves of the marijuana plant. The spots can range in color from white to grayish brown to yellow, first appearing as small round lesions. As yellow leaf spot matures, it takes on a pimple-like appearance, expanding in size.

Yellow leaf spot will damage the leaves and sometimes the stems of your cannabis plants, but will not kill the crop. However, if left untreated it will reduce yield. Infected leaves dry at the site of the spot, eventually crumbling and creating a hole where the spot began. Heavily infected leaves will turn completely yellow, dry up and drop off. If the fallen leaves are not removed, you have just created a landing ground for spores to overwinter. This means they lay low until warmer weather arrives which is when they do their damage. Yellow leaf spot spores rely on the wind, water and hitchhiking onto passersby for their travels.

Yellow leaf spot can be prevented from attacking your cannabis garden through crop rotation. This means choosing a different planting site after each harvest. If this is not possible, then once you have harvested a marijuana crop completely remove any evidence of the previous vegetation and till the soil well, removing all debris. Prepare the site with sterilized compost and work into the soil. This should provide enough nitrogen to give the new crop a healthy starting ground. In the event you have no available compost (every gardener should get into the habit of creating a compost pile) then add blood meal, fish meal or soybean meal to the existing dirt. This will provide the nitrogen needed for your cannabis. Be sure to sterilize all gardening tools with peroxide or rubbing alcohol before storing.

Another option when starting a new marijuana bed is to apply a fungicide to the planting site before adding seed or seedlings. There are various natural solutions you can either make yourself, or buy already mixed. Adding beneficial bacteria, such as Bacillus Pumilis or beneficial fungi such as Trichoderma will benefit the soil if you have no compost to incorporate. You can also spray the area with essential oil mixtures containing cinnamon, clove, coriander, neem, or sesame. Spraying the soil with compost tea or a baking soda solution can help to prevent yellow leaf spot spores from settling in the area.

Water your cannabis plants in the early morning or early evening. Water the soil, not the leaves. In so doing, the sun’s rays won’t burn the leaves. This practice should be adhered to no matter what you are growing.

In between harvests, if yellow leaf spots find your marijuana patch, the fungus can be controlled in several ways:

Physically remove all affected leaves and destroy them. Do not add Leaf septoria or yellow leaf spot is caused by Septoria cannabis and S. neocannabina, both of which are fungal pathogens, targeting cannabis in particular. It occurs on outdoor grown marijuana, triggered by warm weather and rain. It can also appear in plants lacking sufficient nitrogen. Yellow leaf spot will first appear on the lower leaves of the marijuana plant. The spots can range in color from white to grayish brown to yellow, first appearing as small round lesions. As yellow leaf spot matures, it takes on a pimple-like appearance, expanding in size.

Yellow leaf spot will damage the leaves and sometimes the stems of your cannabis plants, but will not kill the crop. However, if left untreated it will reduce yield. Infected leaves dry at the site of the spot, eventually crumbling and creating a hole where the spot began. Heavily infected leaves will turn completely yellow, dry up and drop off. If the fallen leaves are not removed, you have just created a landing ground for spores to overwinter. This means they lay low until warmer weather arrives which is when they do their damage. Yellow leaf spot spores rely on the wind, water and hitchhiking onto passersby for their travels.

Yellow leaf spot can be prevented from attacking your cannabis garden through crop rotation. This means choosing a different planting site after each harvest. If this is not possible, then once you have harvested a marijuana crop completely remove any evidence of the previous vegetation and till the soil well, removing all debris. Prepare the site with sterilized compost and work into the soil. This should provide enough nitrogen to give the new crop a healthy starting ground. In the event you have no available compost (every gardener should get into the habit of creating a compost pile) then add blood meal, fish meal or soybean meal to the existing dirt. This will provide the nitrogen needed for your cannabis. Be sure to sterilize all gardening tools with peroxide or rubbing alcohol before storing.

Another option when starting a new marijuana bed is to apply a fungicide to the planting site before adding seed or seedlings. There are various natural solutions you can either make yourself, or buy already mixed. Adding beneficial bacteria, such as Bacillus Pumilis or beneficial fungi such as Trichoderma will benefit the soil if you have no compost to incorporate. You can also spray the area with essential oil mixtures containing cinnamon, clove, coriander, neem, or sesame. Spraying the soil with compost tea or a baking soda solution can help to prevent yellow leaf spot spores from settling in the area.

Water your cannabis plants in the early morning or early evening. Water the soil, not the leaves. In so doing, the sun’s rays won’t burn the leaves. This practice should be adhered to no matter what you are growing.

In between harvests, if yellow leaf spots find your marijuana patch, the fungus can be controlled in several ways:

Physically remove all affected leaves and destroy them. Do not add any diseased plant material to the compost pile.
Spray the affected areas with a mild solution of ½ teaspoon baking soda per gallon of water. Do this in the early morning or in the evening so the leaves dry before the sun heats the day.
Apply a Bordeaux mixture to discourage the disease from spreading.
Spray the plants with a neem oil solution in the early morning or evening to avoid the sun burning the plant leaves.
Use something like Marijuana Booster to avoid nitrogen deficiencies.

Hope this helps
Will


#15

Same weather here. Will try to flush. Thanks


#17

Several different strains. Outdoor. Hot and humid. In pots in soil.


#18

I can take more pics. What info do you need?


#19

Outside grow. Very hot and humid. Several different strains


#20

Any of the relevant specifics asked for in this list, especially what the pH is at the rootzone, and things like if you can see any bugs or anything that looks like a powder or fuzz that might indicate the presence of a fungal infection.

~MacG


#21

I posted evething you need to know. About what’s going on with your plants no others pic’s required.

Will