This is very hard to find in trading medicinal perennial herb. The plant is poisonous but it was used in medicin in the similar way as better known Thapsia garganica.  This plant is frost hardy to zones 8/9 and likes well drained soils and much of sunlight. The seeds should probably be sown surface in pots in warm in well drained soil (the best cactus substrate). Package 5 fresh seeds. Only a few packages available.