How to care for street trees
Trees need water, good soil and space to root.
Watering Street Trees
You should give a new street tree 20 gallons of water once a week, or run a low-pressure hose at the base of the tree for 20 minutes. A tree needs about 10 gallons of water per inch of trunk diameter. Boston’s new street trees are typically two inches in thickness.
During really hot weather, a tree will need 30 gallons of water each week in two separate waterings: 15 gallons one day and 15 gallons a few days later.
Tips for pouring the water:
Please pour slowly at the base of the tree and in the tree pit.
Cultivating or digging up the top three inches of the pit can help the water get to where it needs to go.
A three-inch layer of mulch will help the soil stay moist and prevent weeds.
Mulching Street Trees
You can add a three-inch layer of loose, coarse mulch at least three inches from the tree trunk. However, mulching the wrong way can lead to several tree problems:
root rot (soil becomes waterlogged, leading to low levels of oxygen)
disease (deep, moist layers of mulch attract diseases and insects)
water stress (a thick layer of mulch can stop the flow of water to the root)
Please read “Mulch Out, Not Up” for more information.