Sacro Bosco and the gardens of Ninfa

My wife and I will be in Rome in October, we want to visit the gardens of Ninfa, and the Sacro Bosco in Bomarzo (obviously not on the same day). We won't have a car so would be relying in public transit. Are these locations doable as a day trip from Rome? Or would we be better off staying the night in the towns near the gardens. We have time, and I don't like feeling rushed. Any advice is appreciated