Tecate Cypress

Tecate cypress is one of the rarest conifers in North America, native to a small number of disjunct populations in San Diego County, the Santa Ana Mountains of Orange County, and adjacent northern Baja California. It grows as a small to medium evergreen tree with scaly reddish-brown bark and grayish-green scale-like foliage, forming dense stands on dry, rocky chaparral slopes at low to mid elevations.

The species is fire-adapted: its cones are serotinous, remaining sealed on the tree for years and opening only in response to fire heat, releasing seeds onto freshly cleared, mineral-rich soil. In cultivation it is highly drought-tolerant once established and fits well in native or Mediterranean-climate gardens. It demands sharp drainage and lean, dry soil; overwatering or heavy clay causes rapid decline. Established trees require virtually no supplemental irrigation in Southern California. Planted in fall, trees can root into cool, moist soil before the dry season begins.

Wild populations are considered vulnerable due to the species' extremely limited range and susceptibility to Seiridium canker and Phytophthora root rot under stressed conditions. Using nursery-grown stock from local seed sources supports genetic conservation of this rare tree and is preferred over collecting from wild stands.