Pot Size:
Accepted Scientific Name:
Trichocereus grandiflorus hybrid
Origin and Habitat
The original species, Trichocereus grandiflorus, is native to the high-altitude regions of northwestern Argentina, where it grows in rocky, well-drained soils in full sun. The hybrid forms, however, have been extensively developed in cultivation, primarily in horticultural settings around the world. These hybrids are bred for their spectacular, oversized flowers and come in a range of vivid colors. While not found in the wild, their parent species are adapted to dry, sunny climates with cool nights and well-drained soils. Hybrids inherit their drought tolerance and resilience from the wild Trichocereus lineage but are selected for ornamental appeal.
Description
Trichocereus grandiflorus hybrids are clumping columnar cacti that typically reach 12 to 24 inches in height and 3 to 5 inches in diameter per stem. The stems are ribbed with short, golden to reddish spines along the ribs. What sets these hybrids apart is their large, vividly colored flowers, which can be red, pink, orange, yellow, or even bi-colored. Flowers are funnel-shaped, often 4 to 6 inches in diameter, and bloom at night or early morning. Their striking beauty and repeat blooming nature make them a favorite in cactus collections.
Cultivation
Zone USDA Zones 9–11
Temperature Thrives in 15°C to 32°C. Protect from frost below 5°C.
Growth Rate Moderate growth in warm conditions with proper care.
Soil Prefers well-draining soil rich in organic material and pumice for aeration and drainage.
Watering Water thoroughly when soil is completely dry. Reduce watering in cooler months to prevent rot.
Fertilizing Feed with a balanced cactus fertilizer every 2–3 weeks during the active growing season (spring through summer).
Light Requires full sun to partial shade. Bright indirect light is ideal for indoor growing.
Pests and Diseases Can be affected by spider mites, scale, and mealybugs. Use neem oil or insecticidal soap. Root rot may occur in poorly draining soil.
Propagation
Propagated easily from offsets or cuttings. Allow cut surfaces to callous over for several days before planting in pumice-amended soil. Water sparingly until roots are established.
