Oahu’s botanical gardens have more to offer than soothing scenery and impressive plant collections. They also host myriad workshops on floral art and photography, medicinal plants, orchid growing, lei making, flower arranging and more. Two upcoming DIY topics are:

>> Tillandsia planters: Make a wreath and dish garden, 10 to 11:30 a.m. Jan. 31 at Foster Botanical Garden. Fee: $25 plus admission.

>> Silk scarf: Use dyes to create a one-of-a-kind accessory from 10 a.m. to noon Feb. 7 at Foster, Feb. 9 at Hoomaluhia in Kaneohe and Feb. 10 at Wahiawa. Fee: $15 (admission extra at Foster).

Reservations are required; call 522-7066. Find more class listings and volunteer opportunities at honolulu.gov/parks/hbg or find each garden on Facebook.

XERISCAPE GARDEN OFFERS AQUAPONICS LESSONS

Learn about water conservation and growing organic produce at home during the “Economical Aquaponics” class from 6 to 7:30 p.m. Feb. 3 at the Halawa Xeriscape Garden.

Aquaponics setups are easy to manage: Nutrient-rich water from a fish tank is pumped into a vegetable grow bed that serves as a filtration system. The oxygenated water is then returned to the tank and recirculated. Owners need only feed the fish.

The fee for the workshop by HappyPonics Farms is $5 (free for Friends of Halawa Xeriscape Garden members). Registration closes Feb. 2 or when spaces are filled. Call 748-5315 or email workshops@hbws.org.