Tomorrow

Iris Spectacular

, show presented by the Delaware Valley Iris Society (DVIS), an American Iris Society affiliate, with bearded, Siberian, Louisiana, species irises and artistic iris arrangements; 1 to 4 p.m. Fee: $5 (arboretum admission), includes coupon for free iris at the DVIS show in July. Tyler Arboretum, 515 Painter Rd., Media;

» READ MORE: www.dvis-ais.org

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Wednesday, May 28

Lavender: Wow! I Didn't Know That!

, program with Jane Irvin-Clotz (of Garden Gloves) at the Martha Washington Garden Club meeting; 12:30 p.m. Fee: $5, includes refreshments. Masonic Hall, Edgewood and Heacock Roads, Yardley; 215-337-9484.

Up ahead

Volunteer opportunity

, plant an ecologically sustainable garden at the Lambertville Library, 8 a.m. to 12:30 p.m. May 31 and 10 a.m. to noon June 1. Free; includes water, lunch for adults and children over age 10 with parents who sign up: 609-397-0275;

. Bring gloves and tools (garden shovels, spades, rakes, watering cans).

Herb Celebration

, lectures and demonstrations, herbal treats, hand massages, special guests, 10 a.m. to 5 p.m. May 31 and 11 a.m. to 4 p.m. June 1 at Triple Oaks Nursery, 2359 Delsea Dr., Franklinville; 856-694-4272;

» READ MORE: www.tripleoaks.com

. Free. Gourmet box lunches available June 1 only (specify vegetarian or regular); $15 each by prepaid check to HSA-SJ Unit, Box 385 Franklinville, N.J. 08322; lunch questions:

» READ MORE: sjpeachy@yahoo.com

or 856-881-7175.

Volunteers needed

: greet, educate or net butterflies for the Butterfly House (open June 28 to Sept. 1) at Tyler Arboretum. Volunteers will be trained from 1 to 3 p.m. June 8 or June 11; 610-566-9134, Ext. 205, or

» READ MORE: jbell@tylerarboretum.org

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Hidden Gardens of Lambertville

, self-guided tour presented by the Kalmia Club from 10 a.m. to 4 p.m. June 14. Fee: $15; $12 advance, rain or shine. Tour begins at the Kalmia Clubhouse, 39 York St., Lambertville;

» READ MORE: www.kalmiaclub.org

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- Jerene Schroeder

Submit items for "Garden Calendar" three weeks in advance to jschroeder@phillynews.com or at The Inquirer, Box 8263, Philadelphia 19101. Include a contact person, address and phone number.