How to Grow Iris Bearded Immortality
Iris germanica 'Immortality'
Your complete guide to growing Iris Bearded Immortality.
📷 Wikimedia CommonsWhen to Plant Iris Bearded Immortality
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | May – June | July – September | — |
| Zone 2 | April – May | June – August | — |
| Zone 3 | April – May | June – August | — |
| Zone 4 | March – April | June – July | — |
| Zone 5 | March – April | May – July | — |
| Zone 6 | March – April | May – July | — |
| Zone 7 | February – March | April – June | — |
| Zone 8 | February – March | April – June | — |
| Zone 9 | January – February | March – May | — |
| Zone 10 | January | February – April | — |
| Zone 11 | January | January – March | — |
| Zone 12 | January | January – March | — |
| Zone 13 | January | January – March | — |
Companion Plants for Iris Bearded Immortality
✓ Good companions
Natural pest deterrent against iris borers and aphids, blooms complement iris timing
Deters aphids and ants, provides ground cover without competing for nutrients
Complementary bloom times, both thrive in similar growing conditions
Repels pests like aphids and thrips, both prefer similar well-draining soil conditions
Provides structural support and wind protection, complementary root systems
Similar care requirements, sequential blooming extends garden interest
Attracts beneficial insects, similar sun and drainage requirements
Excellent drainage companion, helps prevent root rot in iris rhizomes
✗ Keep away from
Produces juglone toxin that inhibits iris growth and can cause yellowing and death
Requires more moisture and shade, creates overly humid conditions promoting iris soft rot
Aggressive spreader that competes for space and nutrients, can overwhelm iris rhizomes
