As of 2015, the Olive Tree Nursery in Geyserville, California, sells a variety of olive trees, including Italian, Spanish, Greek and French cultivars. The nursery sells trees in 1-, 5- and 15-gallon pots; in 24-inch wooden boxes; and in rocks and small pots as bonsai trees.
Italian varieties include Leccino, Maurino and Pendolino. Leccino is a Tuscan cultivar that produces early ripening fruit with a mild, sweet oil flavor. Maurino and Pendolino trees are good orchard pollinators with low-hanging branches and mild oil.
Spanish varieties include Arbequina, Arbosana and Manzanillo. Arbequina and Arbosana are ideal for high-density orchards due to their compact shapes and high yields. Farmers grow Manzanillo for both its oil and its fruit and harvest the fruit in both black and green varieties. Sevillano is another olive that has large, firm fruit but is low in oil content.
Greek olives include the Kalamata, known for its fruit and oil, and Koroneiki, which farmers grow in high-density orchards and harvest for its fragrant, flavorful oil. French varieties include Cailletier or Nicoise and Aglandau.
The nursery grows its olive trees from cuttings from adult plants, which it takes in the late spring and summer. It roots the cuttings in a rooting medium over heated beds with regular misting. One-gallon trees are typically 6 to 8 weeks old.