SPECIAL

MINI PLANT SALE, sponsored by Friends of Honolulu Botanical Gardens, 9 a.m.-noon Feb. 28; Ho'omaluhia Botanical Garden (wear old shoes); 537-1708.

FIFTH ANNUAL "GROW HAWAIIAN FESTIVAL," with cultural demonstrations, ask-the-expert booths, displays, keiki activities, lei contest and more; 9 a.m.-2:30 p.m. Feb. 28, Amy Greenwell Ethnobotanical Garden, Captain Cook, Big Island; free; 808-323-3318.

WORM COMPOSTING WORKSHOP on vermicomposting (recycling with earthworms); 9:30 a.m. Feb. 28, Manoa Gardens Elderly Housing Community Center, 2790 Kahaloa Drive; $30 (fee includes mini-bin and starter colony of worms); registration: 382-0432, waikikiworm@hawaii.rr.com.

"POND CONSTRUCTION SEMINAR" by Kevin Mulkern, benefit for Lyon Arboretum, a hands-on class on water lilies, "balanced water gardens and containers, and plant selection and care," 9:30-11:30 a.m. Feb. 28, arboretum's entry pond; $15; sign-up, 988-0461, www.hawaii.edu/lyonarboretum/.

FREE LEI-MAKING WORKSHOPS with Brian Choy, part of the city's annual May Day festivities, 9:30 a.m.-12 p.m. Feb. 28, Kane'ohe Community Center auditorium; 768-3041, www.co.honolulu.hi.us/parks/programs/leiday/index.htm.

"WHAT'S EATING MY ROSES?" class on rose diseases and bugs, 10-11:15 a.m. Feb. 28; Foster Botanical Garden (bring sample for diagnosis); garden admission applies ($5 visitors, $3 residents); reservations required, 522-7064.

ORGANIC PEST CONTROL WORKSHOP, sponsored by city Board of Water Supply and Friends of Halawa Xeriscape Garden, workshop on homemade pesticides, composting, vermicomposting (using worms) and compost tea-brewing, 10-11:30 a.m. Feb. 28, Halawa Xeriscape Garden; $5 family (bring spray container); registration required: 748-5363.

"GARBAGE INTO GOLD ... BACKYARD COMPOSTING," workshop; 10 a.m.-noon Feb. 28; The Green House, 224 Pakohana St., Pauoa Valley; $15; to register: 524-8427, www.thegreenhousehawaii.com.

"Growing an Herbal Pharmacy Garden," 1:30-3 p.m. Feb. 28; The Green House, 224 Pakohana St., Pauoa Valley; $15; registration required, 524-8427, www.thegreenhousehawaii.com.

"NATURE SEEDLINGS PARENT/CHILD PROGRAM," a mini-forest nature trail exploration for ages 3-5, followed by storytime and arts and crafts program, 10-11:30 a.m. March 1, Hawai'i Nature Center; $20/non-member parent-and-child team; 955-0100.

MANOA HERITAGE CENTER DOCENT TRAINING CLASS, beginning March 16; 2859 Manoa Road; for times, reservations: 988-1287.

"SPLENDORS OF IKEBANA," annual exhibition of the member works of seven schools, Ikebana International, Honolulu Chapter, 8 a.m.-4:30 p.m. March 23-27, Honolulu Hale courtyard (demonstrations 10-11 a.m. March 24 and 26); free; information, 768-6622.

HONOLULU BOTANICAL GARDEN SYSTEM DOCENT CLASSES, 1-2:30 p.m. Tuesdays, through March 17, Foster Botanical Garden (classes require 25 hours of service); $25 refundable textbook fee; 522-7064.

ONGOING

FREE GARDEN MULCH, 9 a.m.- 3 p.m. Saturdays, Halawa Xeriscape Garden, 99-1269 Iwaena St.; self-service; 748-5041, www.boardofwatersupply.com.

LYON ARBORETUM classes for adults and children, including workshops on invasive plants, organic gardening, traditional Hawaiian crafts, flower arranging, garden photography, field sketching and nature journaling, oshiban, and special children's classes, at the arboretum, 3860 Manoa Road; full schedule at www.hawaii.edu/lyonarboretum; register: 988-0461.

FOSTER BOTANICAL GARDEN seeks volunteers to help maintain new butterfly garden, including ongoing deadheading, replanting and general maintenance; 373-4200.

GARDEN TOUR, one-mile (1 1/2-hour) "easy" guided walk; 10:30 a.m. and 1 p.m. daily (keiki-focused tour, 1 p.m. Sundays); Senator Fong's Plantation and Gardens; $14.50, discounts for kama'aina; 239-6775.

NIAULANI NATURE WALK, guided tour through an old-growth forest; 9:30 a.m. Mondays; Volcano Art Center's Niaulani Campus, Volcano Village, Big Island; 808-967-8222, www.volcanoartcenter.org.

Niaulani Forest WorkDay, volunteers needed to preserve the rainforest; 9 a.m.-12 p.m., third Sunday of each month; Volcano Art Center, Niaulani campus, Volcano Village, Big Island; 808-967-8222.

"PLANTS OF PARADISE GARDEN TOUR," a tour of the museum gardens, 11:30 a.m. daily; Bishop Museum (meeting at Hawaiian Hall entrance); required museum admission; 847-3511.

GUIDED TOURS, view plants of the rain forest; 10 a.m. Mondays-Saturdays; Lyon Arboretum, Manoa Valley; $5; reservations: 988-0461.

TUESDAYS AT KANAHA, weekly beach cleanup and plant maintenance, coordinated by Community Pride at Kanaha Beach Park, Maui, 8-10 a.m. Tuesdays, at the park; Valerie Vines Magee, 808-264-1454.

MAKIKI FOREST RESTORATION PROJECT, volunteers needed as part of Makiki Watershed Awareness Initiative forest restoration project. 9 a.m.-2 p.m., fourth Saturday of each month; 973-9782.

LYON ARBORETUM WORK DAY, weeding and garden maintenance with arboretum grounds crew, first Saturday monthly; times/information: 988-0455.

MANOA HERITAGE CENTER, discover an ancient Hawaiian heiau and native plants while learning Manoa Valley's history; 9 a.m.-4 p.m. Tuesdays-Saturdays; Manoa Heritage Center; $7 general, $4 seniors and military, students free; visits and tours by reservation only: 988-1287, www.manoaheritagecenter.org.

WEED AND POT CLUB, Maui Nui Botanical Garden's Weed & Pot Club meets 8:30-10:30 a.m. Wednesdays, 150 Kanaloa Ave., Kahului, Maui, to do beautification and maintenance work; tools, gloves, drinking water provided; wear shoes; 808-249-2798.

NATIONAL GARDEN HELP, volunteers needed to protect rare plants and ecosystems at National Tropical Botanical Garden, Kaua'i; 808-332-7324, ext. 228, or volunteer@ntbg.org.

SECOND SATURDAY AT THE GARDEN, stroll and learn about home gardening from certified Hawai'i master gardeners and Urban Garden Center volunteers; 9 a.m.-12 p.m. every second Saturday of the month; Pearl City Urban Garden Center; free; 453-6050, www.ctahr.hawaii.edu/ougc.

SELF-DIRECTED DRAWING AND PAINTING, rendering of plants, flowers and seed pods from the garden; 9-10 a.m. Wednesdays; Wahiawa Botanical Garden; reservations: 621-5463.

"NATURE SEEDLINGS PARENT/ CHILD PROGRAM," a mini-forest nature trail exploration for ages 3-5, followed by storytime and arts and crafts program, 10-11:30 a.m., first Sunday monthly, Hawai'i Nature Center; $20/non-member parent-and-child team; 955-0100.