Iris sibirica | Siberian iris

Regular price: $8.99
Regular price
Sale price: $8.99

Shipping calculated at checkout.

Grown from seed in living soil without the use of pesticides, chemicals, or carbon fuels.

ships spring 2026

Siberian irises (Iris sibirica) are pretty, adaptable, long-lived plants with strappy, grass-like foliage and showy flowers. They bloom in a range of colors from purple to blue and can grow anywhere from two to four feet high. These tough perennials prefer growing in moist soil but are surprisingly adaptable, thriving even in dry conditions.

Growers note: Our seeds were collected from cultivar 'Caesar's Brother' (see images 2 and 4). Cultivars do not come true from seed so we are listing these under the straight species. We like these seed-grown irises as they spread by both seed and rhizome and can quickly fill the garden with beautiful - if not perfectly uniform - blooms. We also find the seedpods attractive and like to leave them to stand in the garden through winter.

For Siberian Iris cultivars in an astounding range of colors check out Joe Pye Weed's Garden.

Zone: 3 to 8
Family: Iridaceae
Type: Herbaceous Perennial
Height: 24 to 48 in.
Spread: 30 to 36 in.
Exposure: full sun to part shade
Conditions: average, moist, fertile, well-drained
Bloom Time: May
Native Range: Central and Eastern Europe and parts of Asia
Common Names: Siberian iris, Siberian flag

4" pot

Special Characteristics

Rabbit resistant
Deer-resistant
Drought resistant
Clay tolerant
Winter interest

image credits

Asio otus, CC BY-SA 3.0 , via Wikimedia Commons
Photo by and (c)2007 Derek Ramsey (Ram-Man), GFDL 1.2, via Wikimedia Commons
Dave Whitinger, CC BY-SA 3.0, via Wikimedia Commons
Reinhard Müller, CC BY-SA 4.0 , via Wikimedia Commons
F. D. Richards from Clinton, MI, CC BY-SA 2.0, via Wikimedia Commons
Chmee2, CC BY-SA 3.0, via Wikimedia Commons
Dominicus Johannes Bergsma, CC BY-SA 4.0 , via Wikimedia Commons

Ordering information

Preorders

You may place your order anytime to reserve plants for fall 2025 shipment. If you place multiple orders, we will combine plants into one box (or as many as needed) and any extra shipping charges will be refunded.

We will resume shipping plants as soon as temperatures cool in our location and yours.

We will check in with you a week before shipping to make sure you receive your plants at a time that is convenient for you.

Shipping

Live plants ship in spring and fall only. Plants may ship dormant, depending on variety and season. Shipping costs are most reasonable when bundling like size plants.

4-inch: 1-6 plants ship for $15.00 / 7-13 plants ship for $18.00 / 14-30 plants ship for $40.00
1-gal: 1-2 plants ship for $18.00 / 3-4 plants ship for $25.00 / 5-6 plants ship for $40.00
trees & shrubs: $27.00-$40.00 each, height dependent
seeds: $6.75 or free with orders over $15.00

We regret that we cannot ship internationally or to the following states: AK, AZ, CA, CO, FL, HI, ID, MT, NV, OR, UT, or WA.

Nursery pick up

Plants can be collected from the nursery Monday through Sunday from 10am-4pm in Spring, Summer, and Fall. We prefer 24 hour notice to get your order together and will email you when ready for collection.

Plant Sizes

We most commonly use the following pot sizes for perennials:

4-inch pot: 3.5" H x 3.5" W x 3.5" D
2-quart pot: 6" H x 5.25" W x 5.25" D
1-gallon pot: 6.87" H x 8" Dia (this is a true one gallon pot, not the smaller 'trade' one gallon pot used by many nurseries)

Check out our illustrated pot size guide here.

Representative trees & shrubs are photographed in their pots and posted on each plant page.

Sustainability

Sustainability is at the heart of what we do at The Old Dairy. We grow all of our plants outdoors without the use of chemicals, fertilizers, carbon fuels, or peat.

Many of our perennials are grown in the ground and dug upon order (this is especially true for larger sizes). This practice allows us to grow stronger, healthier plants using native soil, and ultimately reduces our impact on the environment.

Our open-pollinated seeds are collected from plants in our mother beds, which have never been treated with chemicals or sprays of any kind.

Read all about our sustainable practices here.