Bearded iris (Rhizomes): Best planted in late summer to early autumn (July-September), allowing roots to establish before winter.

Bulbous iris (Dutch iris, Reticulata iris, etc.): Should be planted in autumn (September-November), about 4-6 weeks before the first frost.

In mild winter regions, both types can also be planted in early spring, but autumn planting is preferred for stronger blooms.

For bearded iris (Rhizomes):

1. Choose a sunny location – Iris needs at least 6 hours of sunlight per day.
2. Prepare the soil – Use well-draining soil; sandy or loamy soil is ideal.
3. Planting depth –
   • Plant rhizomes shallowly, with the top slightly exposed or just below the surface.
   • If buried too deep, they may not bloom.
4. Spacing – Keep 30-40 cm between plants for airflow and healthy growth.
5. Watering – Water lightly after planting, then only when needed to avoid rot.

For bulbous iris (Dutch iris, Reticulata iris, etc.):

1. Plant bulbs 8-10 cm deep, with the pointed tip facing upwards.
2. Space them 10-15 cm apart in well-drained soil.
3. Mulch lightly in winter in colder climates to protect them.
4. Water after planting, but avoid overwatering.

• Deadhead spent blooms to prevent seed formation and encourage energy storage for next year.
• Leave the foliage intact until it turns yellow; the leaves help the plant store nutrients.
• For bearded iris:
  • Trim the leaves to about 15 cm in late summer to keep the plant tidy.
  • Every 3-5 years, divide overcrowded rhizomes in late summer to maintain vigorous blooming.
• For bulbous iris:
  • Let the foliage die back naturally.
  • If growing in pots or cold regions, lift bulbs and store them in a cool, dry place until replanting in autumn.

Bearded iris: Blooms in late spring to early summer (May-June). Some varieties rebloom in late summer.

Bulbous iris (Dutch iris, Reticulata iris, etc.): Blooms in early to mid-spring (March-May), depending on the variety and climate.

Siberian iris & Japanese iris: Bloom in late spring to early summer (May-July).

The scent of iris flowers varies by variety:

• Bearded iris: Has a fragrance ranging from sweet and floral to grape-like or citrusy.
• Bulbous iris (Dutch iris): Often has a light, fresh floral scent.
• Iris pallida (Orris root iris): Has a powdery, violet-like fragrance, often used in perfumes.
• Siberian iris & Japanese iris: Usually little to no fragrance.

Irises (known in Poland also as kosaćce) are available in Polish florists mainly in spring — from March to June, depending on the variety. Dutch irises are the most commonly found cut flower variety and are widely available from March onwards, making them one of the first vibrant spring flowers to appear in Polish florists after winter. They are popular for Easter arrangements, spring bouquets, and as a thoughtful gift expressing wisdom and hope. Outside the spring season, irises are rarely available as cut flowers in Polish florists. If you want to be notified about iris availability, simply subscribe to our newsletter — we regularly announce the availability of seasonal flowers.

Yes — and this is one of the lesser-known facts about irises. The dried and powdered rhizome of Iris pallida and Iris germanica, known as orris root, has been used in perfumery for centuries. It has a distinctive powdery, violet-like fragrance and is used as a fixative in many classic perfumes, helping other scents last longer. Orris root is one of the most expensive natural perfumery ingredients in the world, as the rhizomes must be dried for 3–5 years before processing. Many iconic perfumes contain iris or orris root as a key note.