Iris Information

Open Garden Days

Come visit us on the following dates to see what's blooming in our gardens. We've scheduled days throughout our bloom season so you can experience the variety and sequence of iris bloom. We will be open each of these days from 10:00 am until 4:00pm. If these days don't fit your schedule, please contact Patrick to schedule a private visit.
May 2nd - You will be able to see our dwarf and median Bearded Iris, some of the unique Species Iris we grow, and some of the later Spring Ephemerals we have scattered around our display beds.
May 10th - Bring your mom for a beautiful Mother's Day visit. We will have plenty of iris in bloom, and our Lilacs, Peonies, and other rare and unique plants should be blooming. It will be a wonderful way to treat your mother on her day!
May 24th - We should be in Tall Bearded bloom season by now. Come view all of the newest hybrids and a few of our older favorites. Our fine collection of Siberian Iris should be blooming as well.
June 6th - Our Tall Bearded and Siberian Iris will still be in bloom. Our earliest Sino-Siberians should also be showing off. If you can only visit once, this is the day! Some of just about everything we grow will be in bloom.
June 21st - If you like to cut flowers and bring them in the house, now is the time to visit. Our Spuria collection will be if full bloom, and they are the best iris for flower arrangements. The last of the Bearded Iris and the early Japanese iris will also be in bloom.
July 4th -  It is Japanese Iris time! Come view our 400+ varieties as they strut their stuff. You might even want to give Patrick your opinion on some of his seedlings.
July 10th - Our last Open Garden Day of the season. Come help us say thank you to all of the flowers that made our season so enjoyable.

Iris 101 Series of Classes

Iris 101 - The World of Irises
An introduction to the wonderful variety in the world of irises
Class limited to 20 people
June 13th, 1:00pm - 4:00pm
Take a tour through the Cascadia Iris Gardens beautiful display beds and production rows to learn about the vast variety of irises we can grow in the Puget Sound. Hear about the cultural needs of each type of iris and how to grow them successfully in your garden.

Click here to open the Iris 101 - The World of Irises reservation form.
Print it out, fill in the bottom portion and return it to us with your payment to reserve your spot.
Iris 101 - Culture
How to Dig, Divide and Replant Bearded Iris
Classes limited to 20 people

Bearded Iris - August 16th, 9:00am - 12:00pm
Beardless Iris - September 13th, 9:00am - 12:00pm

Learn when and how to properly care for your beardless irises. The classes will have lecture time and "hands on" opportunities. Class size will be limited. Please register early to ensure you are not left out. Classes will be held Rain or Shine.

Click here to download the Iris 101 - Culture reservation form. Print it out, fill in the bottom portion and return it to us with your payment to reserve your spot.

Iris 101 - Hybridizing
Everything you need to know about hybridizing irises.
Class limited to 10 people
This is a 2 session class.

Selecting and Hybridizing the Irises - June 13, 9:00am - 12:00am
Harvesting and Planting Your Seeds - September 13, 1:00pm - 3:00pm

Learn the ins, outs and secrets of hybridizing irises. We will cover a bit about genetics, some hybridizing strategies, and the physical steps needed to successfully hybridize an iris.

Click here to download the Iris 101 - Hybridizing reservation form. Print it out, fill in the bottom portion and return it to us with your payment to reserve your spot.

 Growing Instructions

We have pulled together growing instructions for many of the irises we grow. Please select from the list below. Most are specific to our Puget Sound area of Washington State. For specific directions local to your area, or if you do not find what you are looking for, feel free to email Patrick. He is happy to help you grow these successfully.

Growing Japanese Iris


Growing Siberian Iris


Growing Sino-Siberian Iris

Sino Sib McKenzie Bruiser

Growing Spuria Iris


Patrick's Upcoming Speaking Engagements
Cascadia Iris Gardens Tours and other Events

Hill Toppers Garden Club
Bothell, WA
November 7, 2019
How To Grow Iris

Kingston Garden Club
Kingston, WA
November 20, 2019
Puget Sound - Iris Wonderland

Bear Creek Garden Club
Woodinville, WA
January 9, 2020
12 Month Perennial Garden

Lake Washington Garden Club III
Bellevue, WA
February 17, 2020
Program TBD

Terra Tillers Garden Club

March 2, 2020
Iris and Lilacs and Peonies - Oh My!

Greater Portland Iris Society
Portland, OR
March 3, 2020
Turning 40 - Wait! I Already Did That.

Nordland Garden Club
Nordland, WA
April 8, 2020
Iris in the Perennial Garden

Bellevue Demonstration Garden
King County Master Gardeners Saturday Workshop
April 18, 2020
Iris in the Perennial Garden

Oregon Trail Iris Society
Salem, OR
April 21, 2020
Siberian Iris

Rhododendron Species Botanical Garden Spring Sale
April 10 & 11
Potted iris and peonies for sale.
Many really great specialty nurseries will be there selling rare and unusual plants. One of the best spring sales in the Puget Sound area.

Puget Sound Camera Club
May 30
Garden visit

Kubota Gardens Siberian Iris Exhibition
June 7, 10:00am - 4:00pm
Join us at the spectacular Kubota Gardens as we present The Siberian Iris. There will be plants for sale and a lecture on how to grow these amazing iris.

Mercer Belles Garden Club
June 24
Garden visit

Iris - A Flower For All Seasons!

Click on A Flower For All Seasonsthis link to see a chart that shows how, by growing different types of iris, you can have irises blooming in your garden nearly year 'round.
Please note that your results may vary, depending on your local climate, soil type, etc.

For more information, you can join one of these organizations:
King County Iris Society
Society for Japanese Irises
Society for Siberian Irises
American Iris Society

‘I’ve have ordered a large number of iris over the past couple years from Cascadia. Patrick and Margaret have been stellar to work with. I’m very picky and they have been able to accommodate my requests and also keep me very well educated on iris culture. All of their iris I ordered were healthy and strong—every one came back the next year. The pictures of their iris are very accurate as well—no weird color treating. I will continue to work with CIG in the future! Thank you Patrick and Margaret!’

Jeremy M. Overland Park, KS

"I have purchased Japanese Iris from Cascadia Iris Gardens for the past 3 years. I have always received very healthy iris, whether I purchased them spring or fall. I have never been disappointed. That is why I always come back. I am looking forward to seeing their 2018 selection."

Linda M. Monroe, CT

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