Milkweeds or Silkweeds have annual flowering stems from perennial underground rhizomes. For any humus rich, sandy or rocky soil in full sun to partial shade. The species offered here are fully hardy in Central Europe.
Sow at a minimum of some 15°C from spring to early summer in any well drained soil. Transplant rhizomes about 15cm deep after stems have died down in autumn.
Note: All parts are poisonous if ingested, the milk sap may cause severe skin irritations and eye burns.
All are USDA Climate Zone 7.
20 seeds per package, unless stated differently.