Q: What are the watering requirements of a Douglas fir tree?
Wednesday, January 20, 2016
Q: What are the water requirements of a Douglas fir tree of about 10 feet? Or better yet, what are the requirements by height and month? There surely must be data to answer such a question. Thank you for your trouble.
A: There are several keys to watering trees:
- Do not allow the lower trunk to get wet.
- This allows pathogens to enter the bark and attack the tree.
- Slow water added over time is best.
- Soaker hoses work well.
- Water to a depth of 18 inches.
- Have the water begin 18 inches away from the trunk and extend 18 inches past the tip of the longest branch.
- You can buy soil staples to get the hose to go where you want it.
- Water from April through the end of October.
- Only water once a month.
- When the temperature rises above 80 degrees, water every two weeks.
Responder: Brian Gilles, RCA #418, Kirkland, WA