Maintaining the correct humidity level is crucial for healthy cannabis growth, especially during the different stages of its life cycle. For 2-week-old plants, which are in the vegetative stage, a 70% humidity level is generally on the higher end but can be appropriate, especially for young seedlings. Here's a guideline for humidity levels throughout the growth stages:
### Cannabis Humidity Guide
1. **Seedling Stage (0-2 weeks):**
- **Ideal Humidity:** 65-70%
- **Note:** High humidity helps seedlings take in water through leaves since their root system is underdeveloped.
2. **Vegetative Stage (2-8 weeks):**
- **Ideal Humidity:** 40-70%
- **Adjustment:** Gradually decrease the humidity from 70% as they get older. By the end of the vegetative stage, aim for around 40-50%.
- **Why Lower Humidity?** Lower humidity levels encourage stronger root growth and reduce the risk of mold and pests.
3. **Flowering Stage:**
- **Ideal Humidity:** 40-50% at the beginning, decreasing to 30-40% towards the end.
- **Important:** Lower humidity is crucial in the flowering stage to prevent mold and bud rot, especially as the buds become denser.
4. **Late Flowering/Pre-Harvest (last 1-2 weeks):**
- **Ideal Humidity:** 30-40%
- **Purpose:** Helps in trichome development and reduces mold risk.
### Managing Humidity
- **Dehumidifiers:** Useful for lowering humidity, especially in the flowering stage.
- **Humidifiers:** If the air is too dry, especially in the seedling and early vegetative stages.
- **Air Circulation:** Use fans to improve air circulation, which helps maintain even humidity and temperature.
- **Ventilation:** Ensure good ventilation in your growing area. An exhaust system helps to remove humid air.
- **Monitor Regularly:** Use a hygrometer to keep a constant eye on humidity levels.
### Additional Tips
- **Watch Your Plants:** Look for signs of distress. If your plants are thriving at a certain humidity level, it might be okay even if it's slightly outside the recommended range.
- **Gradual Changes:** When changing humidity levels, do it gradually. Sudden changes can stress plants.
- **Environmental Control:** Remember that room temperature can also affect humidity, so keep an eye on both.
Adjusting the humidity as your plants grow is important for their health and yield. Always consider the specific needs of your strain, as some may prefer slightly different conditions :-)