Cleistocactus strausii Cactus Features
Morphology: Cleistocactus strausii has an elongated, cylindrical, gray-green stem with about 25 ribs and densely packed areoles and clusters of spines.
Spines: Each areole has four yellow-brown central spines and 20 shorter white radiating spines. Central spines are up to 2 inches (5 cm) long.
Flowers: Mature plants over 18 inches (45 cm) tall produce deep red to burgundy flowers in late summer. These are cylindrical, up to 3.2 inches (8 cm) long, and grow horizontally and radially from the stem.
Harness: Hardiness zones are USDA 9a to 11b, which tolerate temperatures between 20°F (-6.7°C) and 50°F (+10°C).
Cleistocactus strausii Cactus Size：
- The stem grows up to 10 feet (about 3 meters) tall and is about 2.5 inches (6 cm) in diameter, often branching at the base.
Cleistocactus strausii Cactus Special Care or Planting instructions
- Light
Choose a sunny location with well-drained soil. Water in spring and summer when the top layer of soil is dry.
- Water
Water every five weeks in the fall if the soil is dry. Keep Cleistocactus strausii dry in winter to prevent wet soil combined with cool temperatures and dormancy from causing root rot.
- Fertilization
Fertilize with a low-nitrogen fertilizer during the growing season. Apply a slow-release fertilizer in the spring and it will be sufficient year-round.
- Propagation
It can be propagated by cutting a branch from Cleistocactus strausii and rooting it, but this will leave a scar at the base of the main stem. If using divisions for propagation, remember to let the wound heal for about a week.
- Soil
Cleistocactus strausii grows well in porous soils with little nitrogen. If planted in clay, add 50% sand to improve the soil structure.
- Temperature
Prefers temperatures above 70°F and can tolerate low temperatures of 50°F to 59°F. If temperatures drop below 50°F, consider moving the plant indoors.
- Pruning
Cleistocactus strausii does not require frequent pruning, but if desired, some stems can be removed to keep the plant looking nice.
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