Tree watering

The Mystic River Watershed Association is on a mission to plant 100 trees in Somerville, using volunteers. They’ve planted about 50 trees already (I think). But they need volunteers to help water the trees, because the roots of newly planted young trees haven’t extended deeper into the earth to hunt for water. Today, I signed up to help water some trees, though I’m not sure what kind of commitment I’m getting myself into yet.