Green Thumb Festival: 9 a.m.-4 p.m. today-Sun., Walter Fuller Park, 7891 26th Ave. N, St. Petersburg. Plant and landscape festival celebrates Arbor Day and Earth Day with flowering plants, trees, herbs, garden art for sale, soil and water testing, tool sharpening, horticulture exhibits, Children's Plant Fair (9 a.m.-2 p.m. today-Sun.), Garden Club of St. Petersburg Flower Show (9 a.m.-4 p.m. today, 10 a.m.-3:30 p.m. Sun.), diagnostic clinic, recycling rally, free mulch, more. Free. (727) 893-7335.
Brooker Trail Hike: 9-11 a.m. Saturdays, Brooker Creek Preserve, 3940 Keystone Road, Tarpon Springs. Along Environmental Education Center trails; for adults and youth ages 7 and older. Free. (727) 453-6800.
Weedon Walk: 9-11 a.m. Saturdays, Weedon Island Preserve Cultural and Natural History Center, 1800 Weedon Drive NE, St. Petersburg. Hike through coastal mangrove and upland ecosystems. For adults and youth ages 6 and older. (727) 453-6500.
Celebrating Nature in Spring Hill: 9 a.m.-2 p.m. today, Nature Coast Botanical Gardens, 1489 Parker Ave., Spring Hill. Garden Club celebrates Arbor Day and Earth Day with talks on planting trees, choosing the right plants, conserving water, fighting invasive plant species and more; entertainment; tour of nature garden; free plant to first 100 attending. Free; donations accepted for garden tours. (352) 683-9933. naturecoastbotanicalgardens.com.
Philippe Nature Walk: 9-10:30 a.m. today, Philippe Park, 2525 Philippe Parkway, Safety Harbor. Learn park history and explore nature in one of Pinellas' oldest parks; wear closed shoes, hat, sunscreen, repellent. Free; registration required. (727) 669-1947.
Native Plants for Earth Day: 9:30 a.m.-2 p.m. today, Crews Lake Wilderness Park, 16739 Crews Lake Drive, Shady Hills. Nature Coast Chapter of the Florida Native Plant Society celebrates Earth Day with native plants, seed kits, books for sale, among other Earth Day programs at the park. (727) 848-2177.
Fort DeSoto Stroll: 10-11 a.m. today, Fort De Soto Park, 3500 Pinellas Bayway S, Tierra Verde. Guided arrowhead or nature walk for entire family. Free, but registration required. (727) 582-2267.
Keeping a Green Lawn: 10 a.m. today, Hernando County Cooperative Extension Service, 19490 Oliver St., Brooksville. Learn to maintain a healthy lawn in Florida. Free. (352) 754-4433.
Wildflower Walk: 10:30 a.m. today, Boyd Hill Nature Preserve, 1101 Country Club Way S, St. Petersburg. Included with admission. $2 adults, $1 ages 3-17. (727) 893-7326.
Propagating Rhizomes: 10:30 a.m. today, Famous Tate Distribution Center, 6401 N 54th St., Tampa. Begonia Society of Tampa Bay meeting includes presentation on propagating rhizomes; plant raffle; free begonia to first-time guests. (813) 838-0374.
Flower & Garden Festival: Through June 1, Walt Disney World, Interstate 4, Exit 64, Lake Buena Vista. "Great American Gardeners" talks include: "Slow Gardening," with NPR host Felder Rushing, today-Sun.; "Whole Garden Foods," with Florida garden writer Tom MacCubbin, shows how to grow an edible landscape, Fri.-May 4. Topiaries, rose, fragrance, butterfly, Outdoor Living gardens. Included in EPCOT admission: $71 plus tax adults, $60 plus tax ages 3-9. Discounts for Florida residents. (407) 934-7639. www.disneyworld.com/flower.
Insects Be Gone!: 10 a.m. Tue., Forest Oaks Government Plaza, 7479 Forest Oaks Blvd., Spring Hill. Florida-friendly gardening class on safely getting rid of insects that destroy lawns and landscapes. Free on first-come, first-seated basis. (352) 754-4433.
Green Elephant Sale: 7 p.m. Thur., Ragan Community Center, 1200 East Lake Ave., Tampa. Tampa African Violet Society's Green Elephant Sale includes auction of plant-related items, plus plant raffle. Free. (813) 251-1581.
Plant & Garden Treasures Sale: 8:30 a.m. May 3, Clearwater Garden Club, 405 Seminole St. Clearwater. Garden Club's annual sale of homegrown plants, garden treasures, whimsies and accessories, baked goods. Proceeds benefit local student scholarships. Free. (727) 443-7032.
Living Green Expo: 9 a.m.-5 p.m. May 3; 10 a.m.-4 p.m. May 4, Harborview Center, 300 Cleveland St., Clearwater. Get ideas, tips and resources on saving money while saving natural resources and the environment. Free native low-growing tree giveaway while supplies last. Free. (727) 462-6778. PinellasLivingGreenExpo.org.
Day Lily Show and Sale: 9 a.m.-4 p.m. May 3, First Baptist Church of St. Petersburg, 1900 Gandy Blvd., St. Petersburg. Bay Area Daylily Society's 15th annual sale and show. Plant sale starts at 9 a.m. "Day Lilies 101" talk at 11 a.m. Flower display open noon to 4 p.m. Free. (727) 595-5991. bads.us.
Family Day in the Garden: 9-11:30 a.m. May 3, Pasco County Fairgrounds, 36722 SR 52, Dade City, in demonstration garden in front of fairgrounds. Exhibits on rainbarrels, saving water, growing an herb garden; refreshments; free plant for kids; melaleuca mulch $2.50 per bag. Free, but registration requested. (352) 521-4288 or (813) 996-7341, ext. 4288.
Garden Tips 'N' Tricks: 9-11 a.m. May 3, Land O' Lakes Community Center, 5401 Land O'Lakes Blvd. Master gardener program shares expert tips on cultivating a thriving garden. Free, but registration requested. (352) 521-4288 or (813) 996-7341, ext. 4288.
Ruskin Tomato and Heritage Festival: 10 a.m.-5 p.m. May 3; 10 a.m.-4 p.m. May 4, E.G. Simmons Park, 2401 19th Ave. NW, Ruskin. Celebrate Ruskin's tomato bounty with specialty foods, country and Bluegrass music, antique car and tractor shows, plant show and sale, crafts, kid's activity area with rides and games. Free tomato plants while supply lasts. $5; 12 and younger free. (813) 645-3808. ruskintomatofestival.org.
Carousel of Roses: noon-9 p.m. May 3; noon-6 p.m. May 4, Westfield Brandon Mall, 459 Town Center, Tampa. Near mall's south entrance. Tampa Rose Society's 37th annual show, with hundreds of blooms: hybrid teas, miniatures, climbing, Old Garden roses; arrangements and fresh-cut roses for purchase; rosarians offer rose care tips. (813) 626-3874.
Spring Garden Stroll: noon-4 p.m. May 4, Historic Old Northeast Neighborhood, St. Petersburg. Visit lush private gardens with creative patio designs and garden accents, water features, exotic and native plants, in historic neighborhood. Ticket locations online. $10 advance, $15 on tour day; includes same-day admission to Sunken Gardens. (727) 825-0479. honna.org.
Bromeliad Auction: 7 p.m. May 6, Hope Presbyterian Church, 1698 S Belcher Road, Clearwater. Florida West Coast Bromeliad Society's annual auction of wide array of bromeliad varieties for outdoor and indoor uses. (727) 544-9187 or (727) 439-7782.
Home Composting: 10 a.m.-noon May 7, Manatee County Extension Office, 1303 17th St. W, Palmetto. Learn composting basics in workshop; includes compost bin. $10, registration required. (941) 722-4524 or (941) 742-5986.
Landscape Makeover: 6-8:30 p.m. May 7, Manatee County Extension Office, 1303 17th St. W, Palmetto. Design a low-maintenance landscape with Florida-friendly techniques, in workshop. Free, but preregistration is required. (941) 722-4524 or (941) 742-5986.
Make a Rainbarrel: 10 a.m.-noon May 8, Manatee County Extension Office, 1303 17th St. W, Palmetto. Workshop shows how to capture rainwater in a barrel for garden use; rainbarrel kit included. $40, registration required. (941) 722-4524 or (941) 742-5986.
St. Petersburg Saturday Morning Market: 9 a.m.-2 p.m. Saturdays, along Central Avenue between First and Second streets. (727) 455-4921. www.saturdaymorningmarket.com.
Produce Market at the Mustang: 8 a.m.-4 p.m. Saturdays and Sundays, Mustang Flea Market, 7901 Park Blvd., Pinellas Park. Free; $1 parking. (727) 544-3066.
Clearwater Farmer's Market: 8 a.m.-1:30 p.m. Wednesdays, downtown, between Cleveland and Pierce streets on Osceola Avenue, Clearwater. (727) 461-7674.
St. Pete Beach Fresh Market: 9 a.m.-2 p.m. Wednesdays., St. Pete Beach Community Center, 7701 Boca Ciega Drive, St. Pete Beach. (727) 363-9245.
Largo Harvest Marketplace: 9 a.m.-3 p.m. Thursdays, Ulmer Park, 301 West Bay Drive, Largo. (727) 587-6740, ext. 5017.
Treasure Island Open Air Market: 9 a.m.-1 p.m. Fridays, Treasure Island Community Center, Gulf Boulevard and 106th Avenue. (727) 360-4121.
Ybor City Saturday Market: 9 a.m.-1 p.m. (summer hours through Sept.) Saturdays, Centennial Park, Eighth Ave. and 18th St., Ybor City. (813) 241-2442.
Sweetwater Sunday Organic Market: noon-4 p.m. Sundays, 6942 W Comanche Ave., Tampa. (813) 887-4066 or www.sweetwater-organic.org.
Send submissions to Garden Calendar, Newsfeatures, St. Petersburg Times, P.O. Box 1121, St. Petersburg, FL 33731; e-mail to email@example.com, or fax (727) 892-2327. Deadline is two weeks before publication.