Coming on A1 highway:
Exit at Barberino di Mugello. Follow indications for Borgo San Lorenzo. Once you find yourself at Borgo S. Lorenzo, continue in direction Faenza (you take SS302 Faentina). 3 km after you leave Borgo S. Lorenzo turn right for Corniolo/Mucciano. From that point on follow indications for "Agriturismo Il Poggio alle Ville". The last 2 km are unpaved street easily accessible (highway exit - agriturism 27km).
Coming from Florence:
Go direction Fiesole - Olmo - Borgo S. Lorenzo. Once you are at Borgo S. Lorenzo follow instructions above (Fiesole - agriturism 30km).