Partly because of the richness of the soil, and partly because of the climate, but largely because of the choice selected varieties of the plants themselves and the special attention that they receive, the plants at Santa Rosa grow in truly tropical luxuriance. Old residents who remembered the present Burbank gardens when the spot they now occupy was an arid, desert-like area, must rub their eyes when they view such a scene as that here depicted. No one who witnessed this transformation is likely ever again to pronounce any soil worthless. Regulate the conditions of moisture and aeration properly, and almost any soil becomes productive.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 12 Chapter 2