Flower picture of this Iris variety
  • Random sample rhizomes from our iris
  • Flower picture of this Iris variety
  • Flower picture of this Iris variety

Iris tectorum Japanese Roof Iris


The roof iris (iris tectorum) is native to China, but was first discovered in the 1860s, growing in Japan on the roofs, hence the common name. It grows about a foot tall with a spreading, rhizomatous habit common to most irises.

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Height 18-24 inches,
Leaves are light green, about a foot long, broadly sword shaped and slightly corrugated down their length. Instead of standing stiffly erect, the leaves arch over, making them useful as a graceful groundcover.  The flowers appear in late April and early May atop a 2-foot long scape that has a couple branches, each of which produces one or two blooms.

How to thin Bearded Iris in 3 easy steps

More Information

USDA Hardiness Zone
4 through 9
Bloom Time
Late Spring
Bloom Color
White & Purple
Mature Height
Short (12-20 inches)
Attracts Pollinators
Gardening Tips
Irises will absolutely not tolerate wet feet (too much water will cause the rhizomes to rot) and require very well-drained soil at all times of the year.


Bearded Iris Care

Planting Instructions and Plant Care for Bearded Iris Rhizomes and Plants

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