Events are free unless noted. Please email calendar submissions at least two weeks in advance to firstname.lastname@example.org.
Royal Rosarian Rose Garden Contest: Open to all rose growers within 20 miles of Pioneer Courthouse Square, this contest requires that completed applications be postmarked or emailed no later than May 27. For more information and the application packet, visit royalrosarians.com.
Iris Bloom Season: 9 a.m.-6 p.m. through May. Stroll the 10-acre garden and take in a display of more than 500 variations of irises, plus perennials such as lupine, allium, Icelandic poppies and delphinium. $5 tickets or $30 season passes must be purchased at schreinersgardens.com; Schreiner’s Iris Gardens, 3625 Quinaby Road N.E., Salem
Adelman Peony Gardens open house: 9 a.m.-6 p.m. through June 15. Walk 25 acres of production fields or stroll through two acres of display gardens. Adelman Peony Gardens, 5690 Brooklake Road N.E., Salem; peonyparadise.com
Leach Botanical Garden Tour: 1:30 p.m. Fridays, 10:30 a.m. Saturdays and 12:30 p.m. Sundays through June. Learn about the garden’s history, heritage trees, seasonal plants, habitat restoration and more. Register at leachgarden.org; Leach Botanical Garden, 6704 S.E. 122nd Ave.
Spring Into Action, Free Webinars to Learn: Various dates and times through June. Discover methods to save time, money and energy on a garden, property or community. From naturescaping to creating an edible landscape, workshops taught by experts from East Multnomah Soil & Water Conservation District demonstrate ways to benefit people, water and wildlife at emswcd.org.
Mountain Rose Herbs’ Sunday Annex Series: 1-3 p.m. Sundays through July. Learn from teachers, businesses and plant-minded locals about herbalism, healthy living and more. Cost/sliding scale donation varies; Mountain Rose Herbs Mercantile Annex, 152 W. Fifth Ave., Eugene; mountainroseherbsmercantile.com
Grow Your Own Produce, The Workshop Series: (online via Zoom) 7-9 p.m. second Thursday of the month through Nov. 10. Permaculture expert Marisha Auerbach helps you learn to maximize your yield with a monthly overview of key garden activities. $100 for a five-class series or $25 per class; permaculturerising.com
Harvest & Design Workshop Series: 10 a.m. second Saturday of the month through November. Take a monthly guided tour of a flower farm and learn about the plants you will harvest for your arrangement that day. $85 per workshop or $445 for the seven-class package; Charles Little and Company, 34573 Seavey Loop Road, Eugene; charleslittleandcompany.com
Portland Dahlia Society monthly meeting: 7 p.m. second Tuesday of the month through December. Take part in a monthly discussion of seasonal topics. Oaks Park Dance Pavilion, 7805 S.E. Oaks Park Way; portlanddahlia.com
SATURDAY, MAY 28
Get Growing: Introduction to Vegetable Gardening: 9 a.m.-2:30 p.m. Learn about site and crop selection, soil preparation, pest and disease management, irrigation and more. $10; precise location in Hazel Dell will be provided upon registration at eventbrite.com/e/get-growing-introduction-to-vegetable-gardening-tickets-325270140747.
Rooted Chrysanthemum Plant Starts Sale: 9 a.m.-4 p.m. Select from an array of hardy and exhibition style rooted cuttings, and learn about varieties and care from Vancouver Chrysanthemum Society members. 78th Street Heritage Farm (greenhouse 5), 1919 N.E. 78th St., Vancouver; mums.org/washington
Spring Fever Open House: 10 a.m.-5 p.m. May 28-30. Enjoy garden tours, plant sales and special events at eight Cascade Nursery Trail nurseries between Aurora and Salem. cascadenurserytrail.com
THURSDAY, JUNE 9
Portland Rose Society Spring Rose Show: 1-7 p.m. June 9 and 11 a.m.-5 p.m. June 10. Take in the largest rose show in the nation. Lloyd Center (second floor, above ice rink), 2201 Lloyd Center; portlandrosesociety.org, royalrosarians.com
Milky Oats Workshop: 5-8 p.m. June 9 and 11 a.m.-2 p.m. June 11. Discover skills of ancestral folk medicine making. $100; Wapato Island Farm, 15115 N.W. Gillihan Road; wapatoislandfarm.com
SATURDAY, JUNE 11
Natural Pest Control: 10-11 a.m. Learn how to protect your plants using beneficial insects, natural pest repellent and more. $10; Blooming Junction Garden Center and Farm Market, 35105 N.W. Zion Church Road, Cornelius; bloomingjunction.com
Beginning Bonsai Class: 10 a.m.-2 p.m. This introductory course includes all materials, a book, a pot, soil, a bonsai, use of bonsai tools and three hours of instruction. $60; Terra Gardens Nursery & Bark, 270 Cordon Road N.E., Salem; terragardens.net
Inviting Vines Garden Tour: 10 a.m.-4 p.m. Visit five private gardens in the Lake Oswego-West Linn area, enjoy a docent-led tour of Rogerson Clematis Garden and participate in a silent auction. $30; Rogerson Clematis Garden at Luscher Farm, 125 Rosemont Road, West Linn; rogersonclematiscollection.org
SUNDAY, JUNE 12
Garden Tour and Faire: 9 a.m.-4 p.m. Featuring more than 60 garden-themed vendors, this event will showcase traditional and specialty plant growers, garden art and more. The tour (10 a.m.-3 p.m.; $10) includes entrance to five gardens. Northeast Cowls Street between First and Third Streets, McMinnville; mcminnvillegardenclub.org
SATURDAY, AUG. 6
— Corey Sheldon