approx. 30-50 cm
perennial, tuberous, procumbent
yellow to greenish, sometimes with a brown tip
20-45 °C in summer, hardy to -15 °C with isolation
> 30 %
only to be watered during the growth period, avoid constant humidity!
seeds (stratification period up to 2 years)
3 (1 = very easy, 5 = extremely difficult)
An outstanding species inhabiting coastal (?) regions in Sardinia, Tunisia and the Egadian Islands. After many years a huge, irregularly shaped underground stem develops which can grow as big as two fists!
Although adapted to very dry habitats it is unusually easy in cultivation, even forgiving a few cultivation mistakes or too much water for a short time.
However, it is better kept only slightly humid in active growth and completely dry during winter.
If the tubers are located deep enough (> 30 cm) in a well-drained substrate it will be completely hardy in most European climates.