A fire swept through the Mayacamas Mountains foothills in 1964, creating an environment ripe for the knobcone pines that quickly repopulated the land. Four years later, Jane Davenport Jansen purchased more than 40 acres of the nascent thicket, taming it with vineyards planted on the open valley floor. In 1987, she began cultivating a garden along the rocky, steep hillsides, which were pocked with the remains of abandoned rock quarries. Heavy rains and natural infiltration of waters created a group of ponds, creating a serene natural environment that Jansen soon planted with seedlings, flowers, and plants from seeds collected on more than 25 annual Asian expeditions. Until she passed away in 2000, Jansen funded the growth and cultivation of the 25-acre garden, which is now one of the largest collections of scientifically documented, wild-source Asian plants on the continent. Visitors can view the rare plants and vast selection of Asian greenery blossoming from the Glen Ellen countryside as they meander through the gardens during self-led tours.