Ideal Temperature for Buck-horn cholla

Buck-horn cholla flourishes in warm conditions and does not withstand cold. Optimal growth occurs when temperatures exceed 65℉. In winter, maintain temperatures above 50℉. If the temperature drops below 40℉, the plant may weaken, droop, and become susceptible to root decay. Minor frost damage might not show immediate signs, but the plant will progressively decline after about a week.

Prune away frost-damaged sections, checking for root rot. If roots are rotted, remove them, and the plant can be propagated via cuttings. Promptly relocate indoors to a warm setting and position the plant near a south-facing window for abundant light. If natural light is inadequate, provide supplementary illumination.

In summer, Buck-horn cholla should be maintained below 85℉. When temperatures surpass 100℉, the plant's development will halt, it will dehydrate, wilt, and become more vulnerable to sun damage.

Eliminate the sunburnt and decayed portions. Protect the plant from direct afternoon sun until it recuperates and resumes growth. For plants with root rot, cease watering until new roots start to form.