approx. 30-50 cm
perennial, tuberous, suberect herb
yellow/brownish with a dark throat
20-35 °C in summer, hardy to -10 °C with isolation
> 50 %
moderately humid all year round
seeds (stratification period up to 2 years)
3 (1 = very easy, 5 = extremely difficult)
A small flowered variant of Aristolochia pallida has been completely overlooked in cultivation for years until investigation revealed there's another species belonging to the variable pallida-complex in 2008.
Originating from the central mountains in Spain and Portugal this tiny species can easily be distinguished from the 'classic' A.pallida in several characteristics as well as the distribution area.
Although not as large-flowered as other species from the same clade A. castellana produces amazing, erect zic-zac shoots with flower buds in every leaf axil.