watering trees newly planted (late fall)

Asked December 13, 2018, 11:29 PM EST

Two months ago we planted two aspen trees (8ft) and three pine trees (6,8 10 ft) and are wondering how many times and how we should water these trees over the next few months.

thank you!
Liz

Jefferson County Colorado

1 Response

Hello Liz,

Depending on soil moisture (check 6-8 inches down with a long screwdriver, about 2 feet out from the trunk), you can water weekly whenever there has been no precipitation AND temperatures are over 40F, hand watering 2-4 gallons per inch of trunk diameter over and around the rootball. If temps are consistently over 50F you can water more often. Always check soil moisture before watering to verify that the top several inches of the soil are dry.

Reference: "Care of Recently Planted Trees" http://cmg.colostate.edu/Gardennotes/635.pdf.

"2-4-inch caliper
  • Daily for 4 weeks – Depending on temperature and wind, apply 1-2 gallons per inch of trunk diameter.
  • Every other day for 3 months – Depending on temperature and wind, apply 2-4 gallons per inch of trunk diameter.
  • Weekly until established (two to four or more seasons)."
Once your trees are established, winter water by hand whenever there has been no precipitation for 3-4 weeks and temps are over 40F. See "Fall and Winter Watering" http://extension.colostate.edu/docs/pubs/garden/07211.pdf.

Best regards,