Aristolochia clusii   Lojac.

trivial name

size

habit

inflorescence

exposure

temperature range

humidity

water requirements

 

soil pH

propagation

difficulty

Italian Birthwort

approx. 30-80 cm

perennial, tuberous, procumbent

yellowish with brownish-purple ornamentations

light shade to full sun

20-45 °C in summer, hardy to -5 °C with isolation

> 30 %

only to be watered during the growth period, avoid constant humidity!

alkaline

seeds (stratification period up to 2 years), root cuttings

3 (1 = very easy, 5 = extremely difficult)


Aristolochia clusii is a very showy species but appears to be heavily neglected in cultivation. 

The flowers can reach a size of 5 cm or more which is extraordinarily large for a Southern mediterranean species. 

 

After years, the elongated underground stem turns into a massive storage organ of more than 1 m length and as thick as a human forearm if provided the space and sufficient nutrients.