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Temperature & Humidity: The Sweet Spot for Cannabis
Cannabis plants are sensitive to their environment. Temperature and humidity directly affect growth, bud development, and overall plant health. Getting these right is key to a strong, productive grow.
🌡️ Ideal Temperature
- Vegetative Stage: 70–85°F (21–29°C) during the day, slightly cooler at night.
- Flowering Stage: 65–80°F (18–26°C). Cooler nights help buds develop resin and color.
Pro Tip: Sudden spikes or drops stress plants, slowing growth and reducing yields.
💦 Ideal Humidity
- Seedlings / Clones: 65–70% RH (high humidity encourages root growth).
- Vegetative Stage: 40–70% RH. Moderate humidity promotes leaf growth without mold risk.
- Flowering Stage: 40–50% RH. Lower humidity reduces risk of bud rot and mold.
Pro Tip: Gradually reduce humidity as plants mature, mimicking natural outdoor cycles.
⚠️ Common Mistakes
- Too hot: Leaves curl, stretch, or burn. Buds may lose potency.
- Too cold: Slowed growth, purple stems, poor nutrient uptake.
- Too humid: Mold and mildew, especially in dense buds.
- Too dry: Leaf tips brown, slower growth, trichome production suffers.
🌟 Pro Grower Gems
- Use fans and ventilation to stabilize temperature and humidity.
- Consider humidifiers or dehumidifiers in extreme environments.
- Monitor conditions daily—small fluctuations can have big effects.
Proper temperature and humidity set the stage for everything else: lighting, watering, nutrients, and even pest resistance. Keep your environment in the sweet spot, and your cannabis will thrive.
