In 1903 Henry Huntington purchased the “San Marino Ranch,” a working ranch with citrus groves, nut and fruit orchards, alfalfa crops, a small herd of cows, and poultry. His superintendent, William Hertrich, was instrumental in developing the various plant collections which comprise the foundation of the botanical gardens. The property—originally nearly 600 acres—today covers 207 acres, of which approx. 120 are landscaped and open to visitors. Over 14,000 different varieties of plants are showcased in 14 principal garden areas.