The monsoon season brings much-needed relief from scorching heat, but it also presents challenges for cannabis growers. Excess humidity, heavy rainfall, and increased pest activity can affect plant health and yield. If you’re planning to grow cannabis during the monsoon, you need the right strategies to prevent mold, pest infestations, and water-related stress.In this guide, we’ll cover essential precautions, best practices, and common issues to help you successfully cultivate cannabis during the rainy season.
Challenges of Growing Cannabis in Monsoon 1.High Humidity & Mold Growth
Cannabis thrives in moderate humidity, but during monsoon, humidity levels can reach 80% or higher, creating an ideal environment for mold and mildew.Strains with dense buds are especially prone to bud rot (Botrytis) and powdery mildew.
2.Overwatering & Root Root
Constant rain can lead to waterlogged soil, causing oxygen deprivation in the roots and root rot, which can kill the plant. Water retention in pots or grow beds can also encourage fungal diseases.
3. Pest Infestations Increased
Moisture attracts pests like fungus gnats, aphids, caterpillars, and slugs that feed on cannabis leaves and roots. Mold spores and fungi spread rapidly in wet conditions, damaging leaves and buds.
How to Protect Cannabis Plants During Monsoon
1.Choose the Right Cannabis Strain
Opt for strains that are naturally resistant to mold and humidity, such as sativa-dominant strains with airy bud structures.Autoflowering strains may be ideal since they mature quickly, reducing exposure to prolonged monsoon conditions.
2. Use Well-Draining Soil & Container
If growing in soil, mix it with perlite, coco coir, or sand to improve drainage. For potted plants, use fabric grow bags or pots with drainage holes to prevent water retention.
3.Control Humidity Levels
If growing indoors or in a greenhouse, use dehumidifiers and fans to maintain ideal humidity (45-55%). Increase airflow by pruning excess foliage and spacing plants apart.
4.Provide Shelter & Rain Protection
Set up a polycarbonate greenhouse, transparent plastic sheets, or temporary covers to shield plants from excessive rain. Ensure proper ventilation to prevent trapped moisture.
5.Watering Strategies
Reduce manual watering since rain provides sufficient moisture. If using pots, elevate them on stands to prevent water from pooling at the base.
6. Prevent Mold & Fungal Diseases
Spray a natural fungicide like neem oil, potassium bicarbonate, or diluted hydrogen peroxide on leaves to prevent mold. Avoid watering plants at night, as this increases humidity levels.
7.Control Pests Naturally
Introduce beneficial insects like ladybugs or lacewings to control aphids. Use organic pesticides like neem oil or insecticidal soap. Regularly inspect leaves for caterpillars, slugs, and snails, removing them manually if needed.
8.Train Plants for Better Airflow
Use Low-Stress Training (LST) or Screen of Green (ScrOG) methods to spread out branches, improving air circulation.Trim yellowing or dying leaves to reduce mold risk.
Final Thoughts
Growing cannabis during the monsoon season requires extra precautions to prevent high humidity damage, pest infestations, and waterlogging. By selecting mold-resistant strains, improving drainage, and managing humidity, you can ensure healthy plant growth even in the rainy season.
