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cannabis mold prevention

Cannabis mold prevention
plant red spreading up through the stem causing it to swell, break open, wilt and collapse.
First things first, there are 3 times you are most likely to see mold on your cannabis:
Botrytis can affect the roots, stems, leaves, and buds of a plant and spreads fast with the ability to kill off a plant in just days.

  • Horsetail – 1 ounce of powder makes a gallon of ready-to-spray solution
  • Propolis or bee glue – Can be purchased through online grow shops or retail stores and used immediately
  • Capture & remove – A self-supported, MERV15 or higher HEPA air cleaner will actively remove sub-microns preventing Powdery Mildew (
  • Trichoderma Harzianum – Used in the soil to effectively prevent powdery mildew

Phytophthora infestans show similar signs to powdery mildew, but the fungus can be found on both the tops and undersides of leaves. The primary signs of infection include small translucent or yellow stains which may or may not be followed by white dust on the underside of the leaves.

  • Hygrometer – Measures the humidity of the air
  • Fresh air – Ventilating your grow room with a dynamic filtration system will establish the highest quality of air while preventing mold and microorganisms from contaminating your plants
  • Silica gel packets – Keep moisture levels down
  • Humidity – control humidity levels by reducing it to less than 50%
  • Propolis or bee glue – Can be purchased through online grow shops or retail stores and used immediately
  • Remove & dispose of the infected portions of your plant (create a safety margin by cutting off a bit of the healthy part)
  • Ventilate the growing area by using a HEPA air filtration unit (MERV15 or higher is recommended)
  • Horsetail – 1 ounce of powder makes a gallon of ready-to-spray solution
  • Essential oil extract – Thyme, rosemary, eucalyptus, black caraway & lemongrass can be used as diffusers to prevent bud rot from attacking your plants.
  • Silica – Can be used in soil to help strengthen stems, acts as an alkaline adjustor and can be easily administered through a high-silica fertilizer
  • Crop rotation – Growing marijuana in one location will cause the soil to become worn making it more adapt to infection
  • Compost – Use properly aged compost for soil
  • Clean & sanitize garden tools after use to prevent contamination
  • Trichoderma Harzianum – Used in the soil to effectively prevent powdery mildew Prevent fungi – With proper air filtration (MERV15 or MERV17) you can guarantee the elimination of Fusarium in your grow room.

Instead of going into the he-say-she-say of curing and/or smoking moldy cannabis , we are going to cover preventative measures and the types of molds to watch out for so that growers and smokers can avoid the risk altogether.
While there are many different claims about saving a plant that is suffering from mold or using it anyway, it's important to note how dangerous different types of mold are and how they can …
Cannabis mold prevention
First and foremost, consider whether it is worth trying to save an infected plant. As hard as it may be, there is no way to completely cure an infected plant. All you can do is try and keep the disease at bay while healthy sections of the plant grow. However, in doing so, you risk contaminating the rest of the crop for a small amount of bud that is likely going to be sub-par. Treatments will only go so far, and for many, it is better to cut your loss and burn the infected.
As mentioned, treating these diseases is very tough work, but if things have progressed this far, you will have little choice.
Either add two teaspoons of cider vinegar to 1L of water and spray your plants, or make a mixture of 60% milk and 40% water and spray your plants. Both work to kill Powdery Mildew, but how effective they are is debatable. If you want to avoid fungicides, they are certainly worth a go.
So the best way to prevent both diseases is to ensure that no one condition ever persists for long, and certainly not all together.
Botrytis tends to set it at the base of the stem, making it often hard to detect. Usually, the first signs seen by the grower are when the small leaves of the kolas begin to wither, discolour, and dry out. Upon closer inspection, you may notice fluff growing amongst buds and bud sites, usually grey, blue-green, or white in colour. Depending on conditions, this will either cause the bud to dry out completely and crumble when touched (in low humidity), or turn into a decomposing sludge (in high humidity).
Of all of the types of moulds and infections out there that can attack your cannabis plant, it is Botrytis (bud rot) and Powdery Mildew that are the most common.
These are all quite easy to prevent indoors. A cool temperature is anything under 20 degrees Celsius. Ensure you have a decent ventilation system set up to ensure constant air movement, and try to prevent overcrowding of plants that may inhibit air flow. You should also be able to control the humidity of a grow room using ventilation, keeping things in order.
A bit more can be done with Powdery Mildew. Remove infected leaves and move the plant into a warm, low humidity area. Proceed to spray the plant with safe and specialised fungicides that target the mildew. This should hopefully keep the infection at bay.
Botrytis powdery mildew fungicides infection –>
A mould infection is every cannabis grower’s worst nightmare, so here is how to spot it, and prevent it from ever happening in the first place.