Hundreds of new lavender plants are being planted on Black Mountain, expanding this summer’s harvest season. Two varieties—English and Provence—are favored by Deanna Schaefer of Point Reyes Lavender Company, who air-dries and steam-distills the organic blossoms for their therapeutic properties. By planting on the contours of the mountain, she can take advantage of the sun and excellent drainage of the exposed rocky soil, using only a natural spring for irrigation. “Lavender doesn’t like to have…