LONDON — The second half of 2026 belongs to something looser and more varied than spring’s cherry blossoms and tulips: royal debuts, harvest festivals, giant vegetables, and floats built entirely from dahlias. From a new show on King Charles III’s Norfolk estate to a 19-meter-long dahlia parade in the Netherlands, the world’s flower calendar remains packed with events that celebrate season, place, and community.
Here is a guide to what remains on the global floral itinerary, and what to expect from each.
A Royal Estate Opens Its Gates
The most significant structural change in British horticulture in years unfolds this summer. In 2024, the Royal Horticultural Society announced an overhaul of its flower show calendar: the long-standing RHS Hampton Court Palace Garden Festival became biennial, and RHS Flower Show Tatton Park shifted to once every three years. In their place, the RHS began touring to new venues — Wentworth Woodhouse in 2025, and in 2026, two entirely new locations: Badminton Estate in Gloucestershire, which ran July 8–12, and, for the first time, Sandringham Estate in Norfolk, running July 22–26.
Sandringham is 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 monarch. Early previews describe a garden built around fractals and branching patterns in nature, with sinuous paths threading through a biodiverse mix of trees and perennials. It features many of the King’s favorite species and a bold, personal color scheme.
Alongside that garden, the show includes Long Borders mentored by Chelsea design veteran Tom Hoblyn, 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.
Two weeks earlier, at Badminton, the RHS’s new touring format delivered a highlight: Jo Thompson’s Archers 75th Anniversary Garden, a scene-for-scene recreation of Bridge Farm from BBC Radio 4’s long-running rural drama. Tom Stuart-Smith’s Julia Rausing Garden, at 2,400 square meters, was reportedly the largest show garden the RHS has ever staged. Together, Badminton and Sandringham test whether the RHS’s touring model can replicate the loyalty Hampton Court and Tatton Park built over decades — early reviews suggest a strong start.
Medellín’s Ten-Day Flower Festival
As Sandringham wraps up, Colombia’s biggest annual celebration begins. Feria de las Flores, Medellín’s flagship festival, runs its 69th edition from July 31 through August 9 — ten days of concerts, classic car parades, farmers’ markets, and Antioquian folk music across more than thirty locations and over a hundred public events.
The festival builds toward its closing set piece: the Desfile de Silleteros on the final Sunday. Flower farmers from Santa Elena, a mountain community above the city, carry elaborate floral arrangements called silletas strapped to their backs. Some stand over three meters tall and weigh as much as 80 kilograms, built over months using dozens of flower varieties. This year’s parade includes more than 500 silleteros, including dedicated categories for children and participants with disabilities, walking a 2.4-kilometer route to Plaza Mayor. By most measures, it is the single largest showcase of hand-carried floral craft anywhere in the world.
The UK’s Biggest Independent Show
Back in England, late August belongs to Southport Flower Show, which bills itself as the UK’s largest independent flower show and has run at Victoria Park since 1924. Unlike RHS shows, there are no members-only preview days — the show opens to everyone across all four days, drawing more than 55,000 visitors.
The late-August timing is deliberate: perennials and annuals are at their seasonal peak, and the Grand Floral Marquee is at its most saturated with color. New for 2026 is “The Lakeside Reset,” a redesigned water-feature area intended as a calmer counterpoint to an otherwise busy showground. The Garden Theatre lineup opens with broadcaster and horticulturist Adam Frost.
The World’s Largest Flower Parade Returns
In the Netherlands, autumn opens with Bloemencorso Zundert, held in the small North Brabant town on the first weekend of September. The parade is built entirely around a single flower: the dahlia. Twenty neighborhood teams spend the whole year cultivating dahlia fields — about eight million blooms are used in total, some six million grown locally in Zundert itself.
In the final “Stick Week” before the parade, teams attach the flowers by hand onto enormous steel-and-papier-mâché float structures that can reach 19 meters long and 9 meters high. The floats parade through town on Sunday afternoon, judged by an independent jury, before a public exhibition day on Monday. Founded in 1936 and now recognized on the Netherlands’ national inventory of intangible cultural heritage, it remains the largest flower parade anywhere in the world, built entirely by volunteers.
The UK’s Biggest Harvest Celebration
Closing out the season proper, the Malvern Autumn Show returns to Three Counties Showground in Worcestershire for its 30th-plus edition. It positions itself less as a flower show in the Chelsea mold and more as a full harvest festival. Alongside RHS floral displays and more than a hundred “Grow to Show” competitive classes, the show’s best-known fixture is the CANNA UK National Giant Vegetables Championship, where competitive growers chase Guinness World Records with marrows, giant green beans, super-sized sunflowers, and enormous pumpkins.
It is a fitting bookend to a flower-show year that, across every continent, kept circling back to the same idea: gardens and growers responding to season, place, and community rather than working against them.
Worth Watching For
Regional chrysanthemum and dahlia society shows run through October and into November across the UK, including Bishop Auckland’s long-running Late Chrysanthemum Show. As ever with outdoor events on this scale, most shows remain weather-dependent. Given how volatile 2026 has already proven for UK growers — with 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.