Trees don't need to be watered here after they are established, nor do they need fertilizer (and we aren't really supposed to use much fertilizer here because it gets washed into the bay). I went to the tree giveaway last year and they had people height (5-6 foot) trees of several varieties, nothing exotic or invasive. You had to sign up ahead of time. We got 2 red maples and advice on how to plant them, and had to give details in the sign up on our address and where they would go (backyard, front yard, side). It's a great program, but the old old trees keep getting cut down for construction. Apparently it's pretty easy to get permission even though they are supposed to be protected Grand Oaks.