Gymnocalycium Vatteri Single Spine Description: This is a very slowly growing specie. Generally solitary but old specimens may cluster from the base.
Stem: Flattened with dull grey-green or blue green epidermis, up to 9 cm high 4-10 cm broad (or more in culture)
Ribs:11-14 scarcely prominent.
Areoles: Whit grey wool .
Spines: Stiff and bent to the body, very variable both in length (1 to 2 cm long), cross-section and number ( 1 to 3 in each areole) though some areoles are completely spineless, The most characteristic vatteri form is the one with only 1 spine.
Flowers: 4-5 cm long and 4 cm broad, white with pink to brownish-red throat.
Blooming time: Profuse flowers from late spring to summer.
Cultivation and Propagation: It is a summer grower species that offers no cultivation difficulties. Water regularly in summer (but do not overwater ) keep rather dry in winter. Feed with a high potassium fertilizer in summer. It is quite frost resistant if kept dry (hardy to -5° C) Sun Exposure: Light shade.
Propagation:: Direct sow after last frost.(seldom produces offsets)