Woolly Dutchman's Pipe
yellow with a cherry-red throat
20-30 °C in summer, hardy to -10 °C with isolation
> 60 %
constant humidity and much water especially during hot days
seeds (stratification period up to 2 years), cuttings
1 (1 = very easy, 5 = extremely difficult)
This North American climber seems to be the most commonly sold subg. Siphisia species.
In fact, most of the hardy Aristolochia plants sold by local nurseries (even if labelled A. macrophylla, durior, etc. sometimes) will turn out to be this species.
However, Aristolochia tomentosa can easily be told apart from all its close relatives by the dense pubescence of all green parts, especially young and fleshy shoots.