LONDON — If the first half of 2026 belonged to cherry blossoms in Taipei, tulips in Lisse, and grand spring showcases in Philadelphia and London, the second half shifts to something distinctly different: royal garden debuts, harvest festivals, giant vegetables, and towering floats constructed from millions of dahlias. From late July through September, flower enthusiasts across three continents can still catch some of the world’s most extraordinary horticultural events.
RHS Sandringham Flower Show: A Royal Estate Opens Its Gates
The most significant transformation in British horticulture in years reaches a historic milestone July 22–26, when the RHS Sandringham Flower Show opens on the private Norfolk estate of King Charles III and Queen Camilla.
This marks the second stop in the Royal Horticultural Society’s ambitious new touring model, launched after the organization announced in 2024 that longtime fixtures Hampton Court Palace Garden Festival would become biennial and Tatton Park would shift to once every three years. Badminton Estate in Gloucestershire hosted the new format July 8–12; Sandringham follows two weeks later.
The show’s centerpiece is the RHS Royal Legacy Garden, designed by Catherine MacDonald of Landform Consultants in direct consultation with the monarch. Early previews describe a garden built around fractal patterns found in nature, with winding paths threading through a biodiverse mix of trees and perennials, planted using many of the King’s favorite species in a bold, personal color scheme.
Beyond the headline garden, the show features a Floral Marquee with more than 50 specialist growers, a Flower School producing elaborate floristry displays, a Summer Fruit and Vegetable Competition for junior growers, and a “Leaf Letters” activity where children write messages to the royal couple on hand-chosen leaves.
At Badminton, which opened the touring format two weeks earlier, Jo Thompson’s Archers 75th Anniversary Garden recreated Bridge Farm, the fictional home from BBC Radio 4’s long-running rural drama, complete with welly boots sized for each generation of characters. Tom Stuart-Smith’s Julia Rausing Garden, at 2,400 square meters, became the largest show garden the RHS has ever staged.
Feria de las Flores: Medellín’s Ten-Day Flower Festival
As Sandringham concludes, Colombia’s largest annual celebration begins. The Feria de las Flores runs its 69th edition July 31 through August 9 — 10 days of concerts, classic car parades, farmers’ markets, and Antioquian folk music across more than 30 locations and over 100 public events.
The festival builds toward its closing spectacle: the Desfile de Silleteros on the final Sunday. Flower farmers from Santa Elena, the mountain community above Medellín, carry elaborate floral arrangements called silletas strapped to their backs — some standing over three meters tall and weighing up to 80 kilograms, built over months using dozens of flower varieties.
This year’s parade is expected to include more than 500 silleteros of all ages, including dedicated categories for children and participants with disabilities, walking a 2.4-kilometer route through the city center to Plaza Mayor. The floral monuments remain on public display for several days afterward. It is widely considered the single largest showcase of hand-carried floral craft anywhere in the world.
Southport Flower Show: Britain’s Biggest Independent Show
Back in England, late August belongs to Southport Flower Show, billing itself as the UK’s largest independent flower show and running 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 sit at their absolute seasonal peak, making the Grand Floral Marquee at its most saturated with color. New for 2026 is “The Lakeside Reset,” a redesigned water-feature area intended as a calmer counterpoint to the busy showground. Competitive classes for cut flowers, pot plants, and specialist growers are judged by midday each day, with ribbons displayed immediately.
Bloemencorso Zundert: The World’s Largest Flower Parade
The Netherlands’ autumn opens with one of the most remarkable events on the calendar. Bloemencorso Zundert, held in the small North Brabant town the first weekend of September, is built entirely around a single flower: the dahlia.
Twenty neighborhood teams spend the entire year cultivating dahlia fields — approximately 8 million blooms are used in total, about 6 million grown locally in Zundert itself. In the final “Stick Week” before the parade, workers attach the flowers by hand onto enormous steel-and-papier-mâché float structures reaching 19 meters long and 9 meters high.
The floats parade through town Sunday afternoon, judged by an independent jury, followed by a public exhibition day 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.
Malvern Autumn Show: Britain’s Biggest Harvest Celebration
Closing out the season proper, the Malvern Autumn Show returns to Three Counties Showground in Worcestershire September 25–27, positioning itself less as a flower show and more as a full harvest festival.
Alongside RHS floral displays and more than 100 “Grow to Show” competitive classes for cut flowers, succulents, fruit, and vegetables, 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.
Worth Watching For
Regional chrysanthemum and dahlia society shows run through October and into November across the UK, with Bishop Auckland’s Late Chrysanthemum Show typically falling in early November.
As with all outdoor events on this scale, most shows remain weather-dependent. Given 2026’s volatile conditions — including a wet, record-warm June following heavy January rains — late-summer and autumn show reports may include as much discussion of irrigation and heat-stressed bedding plants as of the blooms themselves.