Central Ohio is home to numerous resources for eager gardeners. Here are some classes and events that will help green up your space this season.

Central Ohio is home to numerous resources for eager gardeners. Here are some classes and events that will help green up your space this season.

Rain barrel workshop

9-11 a.m. April 24

Dawes Arboretum, Newark

Web: dawesarb.org

In this hands-on workshop, you'll learn how to collect rainwater, a key to cutting garden costs and helping the environment. The class costs $50, but participants create a barrel to take home.

Rain Garden Workshop

6:30-8 p.m. May 6

Grange Insurance Audubon Center, Brewery District

Web: franklinswcd.org

Want to rescue your house's foundation and grow water-loving native plants at the same time? Learn how during this seminar hosted by the Central Ohio Rain Garden Initiative. Registration costs $5.

May Herb Day 2010

9 a.m.-4 p.m. May 8

Ohio Herb Education Center, Gahanna

Web: gahanna.gov

If you didn't know that Gahanna is the Herb Capital of Ohio, you will after this daylong festival to include cooking and growing demonstrations, plant sales and on-hand expertise.

Composting 101

10 a.m.-12 p.m. May 15

Franklin Park Conservatory, Near East Side

Web: fpconservatory.org

Horticulturalists will teach the ins and outs of starting and maintaining good compost. Subjects will include types of tools and what ingredients work best. The class costs $15 for members, $20 for non-members.

Rose advice

11 a.m.-3 p.m. May 15 & 16

Oakland Nurseries, multiple locations

Web: oaklandnursery.com

Roses are the subject of adoration and frustration. To help yours thrive, experts from the Central Ohio Rose Society and the Columbus Rose Club will answer questions at the Delaware, Dublin and North Side locations.

Heirloom Gardening

1 p.m. May 15 & 16

Slate Run Living Historical Farm, Canal Winchester

Web: metroparks.net

Using practices from the 1880s, re-enactors will teach modern gardeners about the preservation of antique plants. You'll even get to plant some of these precious species, weather permitting. Admission is free.