The Boojum (Fouquieria columnaris) is a remarkable succulent tree that takes on a columnar, upside-down carrot-like shape, with a vast water-storage system. It is related to the ocotillo and is primarily found in the Baja California Peninsula, with a small population in Sonora, Mexico. Although long-lived, these plants generally grow at a slow pace, reaching heights from 25 to 80 feet in the wild.
During summer, Boojums enter a dormant phase, reducing activity and shedding their leaves starting in April. It’s during this dormancy that the plant blooms, usually in July and August. Growth and the reappearance of leaves begin in midSeptember but may be delayed until November.
Boojums require proper care to stay healthy and thrive throughout the year. Here’s a guide to help you maintain your Boojum tree’s health during different seasons.
Growing in the Ground
Water
Water
Cool Weather: When the plant is actively growing, water it every two to three weeks is crucial. Leaves that turn yellow or brown, or begin to drop, indicate insufficient watering during this time.
Warm Weather: During dormancy, Boojum trees should only require occasional light watering to prevent them from shriveling. Leaves that turn yellow or brown and drop in late spring signal the onset of summer dormancy and cannot be encouraged to re-sprout with watering. The end of the dormant period is marked by the onset of buds or the sudden appearance of leaves. Young boojums are capable of retaining their leaves for a longer period, so continue watering them into the spring until they shed their leaves entirely.
Light and Temperature
Boojums thrive in ample sunlight. When planting very small specimens (onegallon size or smaller), it’s advisable to shield them during the hottest hours of the day. For larger plants, full sun is optimal; however, during their first summer, they will need some shade to shield them from potential sun damage. If a plant suffers from sunburn, you will notice the epidermis on the south or west side turning yellow. To protect them, use shade cloth rated between 30 to 50 percent throughout the summer. As daytime temperatures begin to cool, remove the cloth.
It’s essential to remember that Boojums are adapted to temperatures exceeding 100°F during summer. However, if forecasted temperatures reach consecutive highs above 110°F, monitor the plants closely to prevent heat or sun damage. If necessary, cover them immediately with shade cloth. In winter, mature Boojums are frost hardy down to 18°F. For smaller plants, use frost cloth for protection if temperatures dip below 25°F. Furthermore, position them in warm areas, avoiding locations that trap cold air, such as washes or depressions.
Growing in the Ground Continued
Soil
Boojums are flexible when it comes to the type of soil they thrive in, provided it has good drainage. However, ensure that the plant is not positioned in a location where water tends to collect. Planting in a raised area is advisable to prevent water from pooling around the plants.
