Orchids generally should be watered about once every 7 to 10 days, or when the potting mix feels dry. The exact frequency depends on factors like the orchid species, potting medium, temperature, humidity, light exposure, and season
. Key watering guidelines:
- For orchids with pseudobulbs (e.g., cattleyas, oncidiums), allow the potting medium to dry completely between waterings
- For orchids without water storage organs (e.g., phalaenopsis, vandas), water just before the medium dries out; vandas may need daily watering in warm summer months
- Check roots: silvery or gray roots indicate dryness and need for watering; green roots mean sufficient moisture
- Water thoroughly until water drains from the pot, then allow the medium to dry before watering again
- Avoid overwatering to prevent root and crown rot; orchids prefer to dry out between waterings
- Watering in the morning is recommended to allow leaves to dry and reduce rot risk
- Adjust watering frequency based on environment: warmer, brighter, or drier conditions require more frequent watering; cooler or more humid conditions require less
- In winter, watering once a week is usually sufficient as orchids rest and use less water
In summary, the best approach is to water orchids once a week or when the potting medium is dry, adjusting for species and environmental conditions, and ensuring good drainage and air circulation to keep roots healthy.
