watering new trees

Asked August 17, 2015, 9:53 AM EDT

State is going to take some of my property for re-aligning a road. Will need to replace many trees. How long and how often will I need to water them. The trees are thugas and white pines. How many days and how long each day? I have a quote for the cost of replacing the trees (not the same size!) and I want to figure what the cost of the water will be.

New Castle County Delaware trees and shrubs lawns and turf yards pines trees

1 Response

  • The answer your question regarding watering requirements will be different depending on the caliper of the trees you are planting. Your Thuja will mature at about 60 ft high with a 12-20 foot spread and is generally deer resistant, while your white pine will reach a 80 ft height with a 25 ft spread and is susceptible to deer damage.

  • Watering recommendations are:

    <2 inch caliper

    Daily for two weeks – depending on temperature and wind, apply 1-2 gallons per inch of trunk diameter (Caliper)

    Every other day for 2 months. Depending on temperature and wind – apply 2-4 gallons per inch of diameter.

    Weekly until established (one to two or more Seasons) 2-4 gallons per inch of diameter.

    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) 2-4 gallons per inch of diameter.

    >4 inch caliper -

    Daily for 6 weeks – Depending on temperature and wind – apply 1-2 gallons per inch of trunk diameter.

    Every other day for 6 months – Depending on temperature and wind apply 2-4 gallons per inch of trunk diameter.

    Weekly until established (four or more seasons) 2-4 gallons per inch of diameter.

      • Check the actual water need before watering. A common mistake on compacted and clayey soils (with poor drainage) is to apply too much water per irrigation, waterlogging the planting hole. Never apply irrigation if soil is saturated.
      • Trunk diameter on small trees is measured at six inches above the soil line.
      • As a rule of thumb, establishment takes one season per inch of trunk caliper.
      • Winters without routine moisture, water newly planted trees monthly. However, do not water if the ground is frozen.

    This information is from the Colorado Master Gardeners Gardener notes which has additional information on planting new trees at : http://www.ext.colostate.edu/mg/Gardennotes/635.pd

    Depending on the location and number of the newly planted trees and your water source you may want to consider using tree watering bags. They slowly release the water, eliminates water waste due to run-off and evaporation; -requires re-filling just once ever 5 to 7 days