Brosmatta will be the perfect chance for green thumbs to learn more about low-maintenance and hardy bromeliads from gardening experts.
President of the Bromeliad Society of Australia Ian Hook said enthusiasts of these "weird-looking" plants would, like himself, have a field day browsing through stalls, viewing private collections and watching the national competition.
The semi-retired electronics engineer has about 900 bromeliads in his Northmead garden, a healthy obsession that started by chance when he tracked down a plant expert 25 years ago to help him identify a strange plant he'd found in the garden.
"I like its weirdness," Mr Hook said. "They're the newest family of plant to have evolved due to the continental drift and they're not like any other plant.
"People think they're tropical plants but they grow on rocks, up trees, in swampy areas, mountains, deserts and beaches."
Entry to the public sales and exhibitions portion of Brosmatta is free. On April 18 from 9am-3.30pm and April 19 from 9am-1pm. Visitors can also register to attend specialist conferences between April 16 and 19; prices range from $80 (single day) to $300 (full registration).