Gymnocalycium
Gymnocalycium horstii

Family: Cactaceae (kak-TAY-see-ee)
Genus: Gymnocalycium (jim-no-kal-LISS-ee-um)
Species: horstii (HORST-ee-eye)

Category
Cactus and Succulents

Height
under 6 in. (15 cm)

Spacing
3-6 in. (7-15 cm)
6-9 in. (15-22 cm)

Hardiness
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)

Sun Exposure
Light Shade

Danger
Plant has spines or sharp edges; use extreme caution when handling

Bloom Color
Pale Pink
White/Near White

Bloom Time
Mid Spring
Late Spring/Early Summer

Foliage

Other details
Drought-tolerant; suitable for xeriscaping
Suitable for growing in containers

Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information
Non-patented

Propagation Methods
From woody stem cuttings
Allow cut surface to callous over before planting
From seed; direct sow after last frost

Seed Collecting
Allow unblemished fruit to ripen; clean and dry seeds
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds