How to Water Dendrobium in a Pot
As a valuable variety of orchid plants, potted Dendrobium is favored by gardening enthusiasts for its elegant posture and medicinal value. The correct watering method directly affects the growth condition of Dendrobium. This article will systematically explain the scientific watering methods and remedial measures to help you master the core skills of Dendrobium care.
Four Elements of Scientific Watering for Dendrobium
Water Source Selection and Treatment
High-quality water is the foundation of irrigation. It is recommended to prioritize natural soft water such as rainwater or river water. If tap water is used, it needs to be exposed to the air for more than 48 hours to eliminate chlorine, and can be extended to 72 hours in winter. A small amount of citric acid (0.5g per liter of water) can be added during special periods to adjust the pH value to 6.0-6.5.
Judging the Watering Timing
Use the 'three-observation method': first, look at the surface of the substrate turning white; second, touch the pot wall to check if it's not damp; third, estimate the weight of the pot to see if it's lighter. Keep the substrate slightly damp in spring and summer, and let it dry out before watering in autumn and winter. Special attention should be given to increase the watering amount by 20% during the period of new bud growth (March-May).
Seasonal Watering Plan
Water thoroughly every 5-7 days in spring, spray twice a day in summer, combined with watering the substrate every 3-4 days. Gradually extend to every 7-10 days in autumn, and control watering to every 15-20 days during the dormant period in winter. It is recommended to use a long-spout pot to water slowly along the pot wall.
Emergency Treatment Plan for Waterlogging
Primary Rescue Measures
If waterlogging is found, immediately elevate the pot, tilt it 45 degrees to drain excess water. Use bamboo sticks to make air holes in the substrate and enhance ventilation with a low-speed fan. Sprinkle an appropriate amount of wood ash (5g per pot) to absorb excess water.
Root Repair Process
For severe waterlogging, remove the pot for inspection: 1. Cut off blackened and rotting roots. 2. Soak in potassium permanganate solution (1000 times) for disinfection. 3. Dry in the shade for 24 hours, then replace with a new substrate of stone chips and pine bark (1:3). 4. Bag and moisturize for 2 weeks.
Key Points of Daily Maintenance
Keep the ambient humidity at 60-70%, not lower than 40% in winter. It is recommended to use a hygrometer to monitor and add diluted orchid-specific nutrient solution (2000 times) during the morning and evening spraying. Replace the substrate every spring to ensure good drainage and ventilation.
By mastering these scientific watering and emergency treatment techniques, your Dendrobium will not only avoid the risk of root rot but also display vigorous vitality. Remember the basic principle of 'better dry than wet' and adjust regularly to ensure this 'fairy grass' stays on your windowsill.