Side-by-side plant comparison — which is right for your garden?
Dahlia pinnata
Asteraceae · flowers
Iris germanica
Iridaceae · flowers
Dahlia (Zones 8-11)
Iris (Zones 3-9)
Overlap: Both grow in zones 8–9
| Feature | Dahlia | Iris |
|---|---|---|
| Scientific Name | Dahlia pinnata | Iris germanica |
| Family | Asteraceae | Iridaceae |
| Category | flowers | flowers |
| Sun | ☀️ Full Sun | ☀️ Full Sun |
| Water | 💧💧 Medium | 💧 Low to Medium |
| Soil | Rich, Well-drained | Well-drained |
| Height | 5' | 3' |
| Spread | 2' | 1' 6" |
| Bloom Season | Summer-Fall | Spring |
| Bloom Color | Mixed | Purple, Blue, Yellow, White |
| Growth Rate | Fast | Medium |
| Native Region | Mexico, Central America | Mediterranean, Europe |
| Maintenance | Medium | Low |
Dahlia
Iris
Dahlia
Iris
Choose Dahlia if you don't mind medium maintenance. It thrives in full sun with medium water in zones 8–11.
Choose Iris if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low to medium water in zones 3–9.
Plant them together? Both overlap in zones 8–9. They share similar sun requirements (full sun), making them potential garden companions.
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