12 Toadshade trillium rhizoms,Trillium sessile

you are buying 12 Toadshade trillium rhizoms,Trillium sessile 

Trillium sessile is a PERENNIAL growing to 0.4 m (1ft 4in) by 0.4 m (1ft 4in).
See above for USDA hardiness. It is hardy to UK zone 4. It is in flower from May to June. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in full shade (deep woodland) semi-shade (light woodland) or no shade. It prefers moist soil.