Potassium bicarbonate is a natural fungicide that can help prevent and treat bud rot and powdery mildew by raising the pH of the plant surface and creating an unfavorable environment for fungal growth. Potassium bicarbonate is also safe for humans and beneficial insects.

To use potassium bicarbonate as a preventive measure, you should spray it on your plants once every 7 to 10 days during the flowering stage, when your buds are most susceptible to mold. You should spray it in the morning or evening when the temperature is cooler and the sun is not too strong. You should also avoid spraying it on wet plants or when it is raining, as this can reduce its effectiveness.

To use potassium bicarbonate as a treatment, you should spray it on your infected plants as soon as you notice any signs of mold. You should spray it thoroughly on all parts of the plant, especially the buds. You should repeat this process every 2 to 3 days until you see no more mold.

There is no definitive answer to this question, as different strains of cannabis plants may have different tolerances to rain. However, as a general rule of thumb, you should avoid exposing your plants to more than 12 inches of rain per month during the flowering stage.

Bud rot is not easy to spot in its early stages, as it starts on the stem inside the bud and works its way outward. You may notice some signs of bud rot on the surface of your buds, such as:

• Discoloration: Bud rot can cause your buds to turn brown, gray, or black, depending on the stage of infection.
• Wilting: Bud rot can make your buds lose their shape and structure, becoming limp and droopy.
• Odor: Bud rot can produce a musty, damp, or sour smell that is different from the normal aroma of your buds.
• Texture: Bud rot can make your buds feel wet, slimy, or mushy when you touch them.

To confirm if you have bud rot, you need to break them apart and inspect the inside. If you see white, gray, or black fuzzy mold growing on the stem or the bud tissue, you have bud rot. You may also see some dark spots or holes where the mold has eaten through the bud.

To make a potassium bicarbonate solution, you need to mix 1 tablespoon of potassium bicarbonate with 1 gallon of water. You can also add some liquid soap or horticultural oil to help the solution stick to the plant’s surface.

Besides potassium bicarbonate, there are some other natural remedies that can help prevent and treat fungal infections in marijuana plants, such as:

• Neem oil: This is an organic insecticide and fungicide that can kill fungal spores and prevent them from germinating. It also repels common cannabis pests (red spider mites, fungus gnats, leaf miners, broad mites, russet mites, etc.) and boosts plant immunity. You can spray neem oil on your plants once a week throughout their life cycle.
• Hydrogen peroxide: Hydrogen peroxide is a powerful oxidizer that can kill fungal cells and disinfect wounds. Hydrogen peroxide also increases oxygen levels in the soil and stimulates root growth. You can spray hydrogen peroxide on your plants once every 2 weeks during the vegetative and flowering stages.
• Baking soda: Baking soda is another alkaline substance that can raise the pH of the plant surface and inhibit fungal growth. Baking soda also acts as a mild abrasive that can remove fungal spores from the plant surface. You can spray baking soda on your plants once every week during the flowering stage.
• Apple cider vinegar: Apple cider vinegar is an acidic substance that can lower the pH of the plant’s surface and create an unfavorable environment for fungal growth. Apple cider vinegar also contains beneficial enzymes and bacteria that can improve soil health and plant immunity. You can spray apple cider vinegar on your plants once every week during the flowering stage.

To make any of these solutions, you need to mix 1 teaspoon of neem oil, hydrogen peroxide, baking soda, or apple cider vinegar with 1 quart of water. You can also add some liquid soap or horticultural oil to help the solution stick to the plant’s surface.

To make a BT solution, you need to mix 1 teaspoon of BT powder with 1 gallon of water. You can also add some liquid soap or horticultural oil to help the solution stick to the plant’s surface.

The best way to prevent mold and bud rot is to avoid excessive moisture and humidity in your growing area. You can do this by:

• Choosing a location that has good drainage and air circulation
• Monitoring the weather forecast and moving your plants indoors or under cover if heavy rain is expected
• Shaking off the excess water from your buds after a rain
• Drying your plants with a fan if the weather is still humid and cloudy
• Pruning your plants to improve the airflow and light penetration in your canopy
• Spraying your plants with a fungicide such as potassium bicarbonate or neem oil

Rain can wash away some of the nutrients from your soil, leaving your plants hungry and weak. To prevent this, you should:

• Use organic fertilizers that are slow-releasing and water-soluble
• Apply a foliar spray of seaweed extract or fish emulsion to boost your plants’ immunity and metabolism
• Test your soil pH regularly and adjust it if needed
• Avoid over-watering or under-watering your plants

Drying your buds properly is crucial for preserving their quality and potency. If you harvest your buds in rainy weather, you should:

1. Trim off any excess leaves and stems
2. Hang your buds upside down in a dark, dry, and well-ventilated room
3. Use a dehumidifier or a fan to control the humidity and airflow
4. Check your buds daily for signs of mold or rot and remove them if needed
5. Dry your buds for 7 to 10 days until they snap when bent