Giant Blue / Louisiana Iris
Iris giganticaerulea
Giant Blue / Louisiana Iris is a perennial for bulb layer, mid-border, suited to full sun to partial shade and clay, loam or moist ground, flowering Mar, Apr.
| Type | Perennial |
|---|---|
| Mature height | 150 cm |
| Spread | 60 cm |
| Aspect | full sun to partial shade |
| Foliage | Deciduous |
| Hardiness | USDA 6a-10b |
| Pollinator-friendly | Yes |
| Pet-safe | No |
Where to use it in a border
At around 150 cm, it sits best toward the back of a border, or on its own as a focal point with room around it. Give it about 60 cm of room to spread. It is hardy across USDA zones 6a to 10b, so check it suits your area before planting.
It appears in our lists of full sun, clay soil, wet soil, pollinator-friendly plants.
Border Builder uses Giant Blue / Louisiana Iris's height, spread, soil, bloom months and companions to place it in a full border plan for your own conditions, on iPhone and iPad.
Flowering through the year
Worth knowing
- It copes with ground that stays wet, which most border plants will not.
- Not recorded as pet-safe; site it away from pets that graze if that matters to you.
- Its flowers are valued by bees and other pollinators.
Good companions
Plants that share its conditions and style, chosen to complement its place in the border:
- Anise/Blue Sageto flower when it does not
- Atamasco Rain Lilyto edge in front
- Bottlebrush Buckeyefor height behind it
- Cleyerafor height behind it
- Creeping Phlox 'Sherwood Purple'to edge in front
- Firebushfor height behind it