Iris tectorum or ‘Japanese Roof Iris’
Iris tectorum or ‘Japanese Roof Iris’ is a large flowering Evansia iris (Crested Iris) that grows well in a humus rich damp position. With Purple, White, Pink and Blue flowering Roof Iris cultivars for sale online.
The name Japanese Roof Iris comes from the tradition of this iris being grown on the damp thatched roofs of Japanese Cottages to help hold the thatch together.
They grow well in range of conditions, however are not really suited to hot humid climates. They do form large clumps fairly quickly and will need to be divided every few years to maintain flowering vigour.
A tall growing iris reaching nearly 1m Iris tectorum flowers in late spring to mid summer depending on climate, and it does not like hot dry conditions. Commonly grown in pots submerged near the edge of garden ponds ‘Japanese Roof Iris’ also does well in other pots and containers as long as it is kept moist.
Flowers come in both doubles and singles and are large to 10cm and come in a range of colors including white, pink, purple and blue.
Protect from frosts and divide Iris tectorum or ‘Japanese Roof Iris’ every 4-5 years as pots become crowded.