More than 400 varieties of plumeria will fill Casa del Prado in Balboa Park next weekend, as the Southern California Plumeria Society brings its free, two-day festival back to San Diego for another round of blooms, plant sales and Polynesian dance performances. The event runs from 10 AM to 4 PM on September 5 and 6, drawing thousands of attendees to browse plants from 21 vendors and take in what organizers call the world's largest adjudicated plumeria flower show.
The festival is hosted by the Southern California Plumeria Society, an all-volunteer educational nonprofit founded in 1999 that has grown to more than 600 members. According to the society, the flower show has expanded from roughly 100 entries in its early years to near-thousands of blooms today, cementing its reputation as the largest event of its kind. As reported by FOX 5 San Diego and KUSI News, the flower show is also considered Southern California's largest potted plant sale, with plant runners on hand to carry purchases to a loading zone near Casa del Prado so attendees can keep exploring the park.
What's for Sale, and Why Only Rooted Plants in Fall
Vendors and growers at the 2026 festival are offering more than 400 distinct varieties, colors and fragrances of rooted plumeria plants, with prices generally ranging from $10 to $400, the society notes. Plants must be purchased directly within the designated sales room or courtyard area where they're stocked. Notably, the society intentionally sells only potted rooted plants during the September festival rather than raw cuttings, because autumn arrives too late in the growing season for cuttings to establish roots before plumerias enter winter dormancy.
Unrooted cuttings, by contrast, are sold earlier in the year during the society's spring event. The Plumeria Festival is one of two major annual sales the group hosts at Casa del Prado, complementing its two-day Annual Cutting Sale held every May, which focuses on raw plant propagation at the start of the warm growing season. Plumerias themselves are water-wise, drought-tolerant perennials that drop their foliage and go dormant each year, according to the society, making them well suited to Southern California's Mediterranean climate and requiring minimal watering through late autumn and winter until new leaves emerge in spring.
Flower Show Judging, Food and Entertainment
The competitive side of the festival kicks off Saturday morning, when flower show competitors submit their entries; voting and judging then run from noon to 3 PM that same day, per FOX 5 San Diego and KUSI News. Beyond traditional bloom categories, the flower show also features creative display classes including photography, floral arrangements and lei-making, the society notes. Winners are displayed publicly from 10 AM to 2 PM on September 6, and attendees can also cast votes for a People's Choice Award in the courtyard on September 5.
The weekend will also include live entertainment from Polynesian dancers and musicians, along with Hawaiian food and snacks from vendors including Lil Orbits, Mochinatics, Shrimpholic and Hokulia Shave Ice, according to the outlet's report. Admission to the Plumeria Festival is free, and flower show entry is likewise free and open to non-members every Saturday morning of the event.
Parking Changes to Know Before You Go
Attendees should plan ahead on parking. Balboa Park lots are no longer free, and nearby lots are described as free or low-cost, according to the FOX 5 San Diego and KUSI News report. The Southern California Plumeria Society's own 2026 visitor guidance recommends that anyone unable to park near Casa del Prado use the Inspiration Point lot on Park Boulevard, which offers convenient access to central Balboa Park.
The parking fees arrive amid broader financial pressure on city-run programming in the park. In May, San Diego Mayor Todd Gloria proposed eliminating municipal funding for Balboa Park's December Nights to save roughly $1.5 million, citing the city's fiscal challenges. Volunteer-run events like the Plumeria Festival continue to operate independently of that municipal funding, relying instead on the society's own membership base and plant sale proceeds.
A Broader Mission Beyond the Festival Weekend
Outside of its twice-yearly sales, the Southern California Plumeria Society also offers free local tree-trimming services and sends educational guest speakers to San Diego Unified School District schools and local garden associations, funded in part through meeting raffles and cutting donations. Organizers say proceeds from festival plant sales and memberships likewise support educational grants and community horticulture outreach, extending the group's reach well beyond the Casa del Prado courtyard.
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