From Sandringham’s royal garden to Zundert’s dahlia floats, here’s what remains on the 2026 global flower show circuit
The world’s flower calendar turns decisively toward autumn as summer 2026 fades, offering a diverse lineup that stretches from a groundbreaking royal estate debut in Norfolk to Colombia’s sprawling ten-day flower festival and the Netherlands’ monumental dahlia parade. While spring belonged to cherry blossoms in Taipei, tulips in Lisse and major showcases in Philadelphia and London, the season ahead promises something looser, more varied and deeply rooted in local tradition.
RHS Sandringham Flower Show: A Royal First
The Royal Horticultural Society’s most dramatic calendar restructuring in decades reaches its climax July 22-26, when Sandringham Estate in Norfolk opens its gates for the first major flower show on the private country retreat of King Charles III and Queen Camilla.
The show’s centerpiece, the RHS Royal Legacy Garden, was designed by Catherine MacDonald of Landform Consultants in direct consultation with the King. Early previews reveal a garden built on fractal patterns found in nature, with winding paths threading through biodiverse trees and perennials. The design incorporates many of the King’s favorite species with a bold, personal color scheme.
Sandringham joins Badminton Estate in Gloucestershire — which hosted July 8-12 — as part of the RHS’s new touring model. At Badminton, Jo Thompson’s Archers 75th Anniversary Garden recreated Bridge Farm from BBC Radio 4’s long-running rural drama, while Tom Stuart-Smith’s Julia Rausing Garden, at 2,400 square meters, became the largest show garden the RHS has ever staged.
The Sandringham event features a Floral Marquee with more than 50 specialist growers, a Flower School, a Summer Fruit and Vegetable Competition for junior growers, and a “Leaf Letters” activity where children write messages to the King and Queen on hand-chosen leaves.
Feria de las Flores: Medellín’s Ten-Day Spectacle
From July 31 through August 9, Colombia’s biggest annual celebration unfolds across Medellín. The 69th edition of Feria de las Flores spans ten days of concerts, classic car parades, farmers’ markets and Antioquian folk music across more than 30 locations and over 100 public events.
The festival culminates August 9 with the Desfile de Silleteros. Flower farmers from the mountain community of Santa Elena carry elaborate floral arrangements called silletas strapped to their backs — some standing over three meters tall and weighing up to 80 kilograms. These months-long creations use dozens of flower varieties to depict Colombian landscapes and cultural symbols.
This year’s parade includes more than 500 silleteros of all ages, with dedicated categories for children and participants with disabilities, walking a 2.4-kilometer route through the city center.
Southport Flower Show: Britain’s Largest Independent Show
August 20-23 brings the UK’s largest independent flower show to Victoria Park, running continuously since 1924. Unlike RHS events, Southport offers no members-only preview days — the show opens to everyone across all four days, drawing more than 55,000 visitors.
The late-August timing places perennials and annuals at their absolute seasonal peak. New for 2026 is “The Lakeside Reset,” a redesigned water-feature area offering a calmer counterpoint to the busy showground. The Garden Theatre lineup opens with broadcaster and horticulturist Adam Frost.
Bloemencorso Zundert: World’s Largest Flower Parade
September 6-7, the small North Brabant town of Zundert hosts an event built entirely around a single flower: the dahlia. Twenty neighborhood teams spend the entire year cultivating dahlia fields — approximately eight million blooms used in total, six million grown locally — before “Stick Week,” when volunteers attach flowers by hand onto steel-and-papier-mâché float structures up to 19 meters long and 9 meters high.
Founded in 1936 and recognized on the Netherlands’ national inventory of intangible cultural heritage, the parade remains the world’s largest flower parade, built entirely by volunteers rather than professional exhibitors.
Malvern Autumn Show: Britain’s Biggest Harvest Celebration
September 25-27 closes the season proper at Three Counties Showground in Worcestershire. The Malvern Autumn Show positions itself as a full harvest festival rather than a Chelsea-style flower show, featuring the CANNA UK National Giant Vegetables Championship, where competitive growers chase Guinness World Records with enormous pumpkins, giant marrows and super-sized sunflowers.
Worth Watching
Regional chrysanthemum and dahlia society shows continue through October and November across the UK, including Bishop Auckland’s long-running Late Chrysanthemum Show typically in early November.
Given 2026’s volatile weather — a wet, record-warm June following a deluge-heavy January — late-summer and autumn show reports may include as much discussion of irrigation and heat-stressed bedding plants as of the blooms themselves.