The Boojum 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, Boojum trees 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 mid-September 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
To ensure optimal growth during the cooler season, water Boojums once a week when they are actively growing. In contrast, during the dormant summer season, Boojums only need watering every two weeks. It’s important to allow them to dry out before watering again. Consider using a moisture meter to check your containers for over or under-watering.
Light and Temperatures
Cool Weather: When the plant is actively growing and planted in the ground, watering 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 planted in the ground 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.
If you plan on growing Boojum trees, it’s important to note that they thrive in temperatures above 100o Fahrenheit during the summer. In winter, temperatures may drop below freezing, but not much lower than the mid to low 20s. To protect smaller plants from frost, cover them with frost cloth when the temperature drops to freezing or below. Additionally, plant them in a warm area away from cold air areas, such as washes or depressions.
Boojums require plenty of sunlight, from bright light to full sun. However, if you’re planting very small plants, it is best to protect them during the hottest part of the day. For larger plants, full sun is ideal, but during the first summer, they will require some shade to prevent sunburn. If the plant experiences sunburn, the epidermis on the south or west side of the plant will begin to yellow. Cover with shade cloth rated between 30 to 60 percent for the duration of the summer.
Most aloes are adapted to native soils. Well-draining soils are ideal for most aloes. If unsure if your soil is well draining, adjust the length and frequency of irrigation water. Always let the soil dry out between watering. Amending and adding fertilizer is not necessary when planted in the landscape.
