The second half of 2026 delivers an eclectic mix of royal debuts, harvest festivals, giant vegetables, and the world’s largest flower parade — from a historic garden at King Charles III’s private estate to a Colombian festival built on centuries of farming tradition.
RHS Sandringham Flower Show: A Royal Estate Opens Its Gates (July 22–26)
The most significant transformation in British horticulture in years is unfolding this summer. In 2024, the Royal Horticultural Society announced a major overhaul of its show calendar: the Hampton Court Palace Garden Festival became a biennial event, and Tatton Park shifted to once every three years. In their place, the RHS launched a touring model, debuting at Wentworth Woodhouse in 2025 and adding two new venues in 2026 — Badminton Estate in Gloucestershire, which ran July 8–12, and for the first time, the Sandringham Estate in Norfolk, running July 22–26.
Sandringham serves as the private country retreat of King Charles III and Queen Camilla, and the show’s centerpiece reflects that connection directly. The RHS Royal Legacy Garden, designed by Catherine MacDonald of Landform Consultants in consultation with the King himself, explores fractals and branching patterns found in nature. Sinuous paths wind through a biodiverse mix of trees and perennials, planted with many of His Majesty’s favorite species in a bold, personal color scheme.
The garden pairs with Long Borders mentored by Chelsea design veteran Tom Hoblyn and a series of Show Gardens celebrating Norfolk’s landscapes and progressive horticultural practices. Beyond the headline attraction, the show offers a Floral Marquee with more than 50 specialist growers, a Flower School demonstrating elaborate floristry, 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 foliage.
At Badminton, which opened the RHS touring format two weeks earlier, Jo Thompson’s Archers 75th Anniversary Garden delivered a standout — a scene-by-scene recreation of Bridge Farm, the fictional home from BBC Radio 4’s long-running rural drama, complete with welly boots sized for each generation of characters and sweet pea seeds referencing a specific storyline. Tom Stuart-Smith’s Julia Rausing Garden, at 2,400 square meters, stands as the largest show garden the RHS has ever staged. Together, Badminton and Sandringham test whether the RHS’s new model can replicate the loyalty Hampton Court and Tatton Park built over decades — early reviews suggest a strong start.
Feria de las Flores: Medellín’s Ten-Day Flower Festival (July 31 – August 9)
As Sandringham concludes, Colombia’s biggest annual celebration begins. The 69th edition of Feria de las Flores runs 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 throughout Medellín.
Everything builds toward the festival’s closing set piece: the Desfile de Silleteros on the final Sunday. Flower farmers from Santa Elena, the 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 depicting Colombian landscapes and cultural symbols.
This year’s parade is expected to include more than 500 silleteros of all ages, with dedicated categories for children and participants with disabilities. They walk a roughly 2.4-kilometer route through the city center to Plaza Mayor, where the floral monuments remain on public display for several days afterward. By most measures, it represents the single largest showcase of hand-carried floral craft anywhere in the world — a direct descendant of the region’s flower-growing economy rather than a garden-design exercise, giving it a very different texture from the RHS shows or Keukenhof.
Southport Flower Show: The UK’s Largest Independent Show at Its Seasonal Peak (August 20–23)
Back in England, late August belongs to Southport, which bills itself as the UK’s largest independent flower show and has run at Victoria Park since 1924. Unlike the 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: it sits in the gap after the summer planting rush and before the autumn clear-up, meaning perennials and annuals reach their absolute seasonal peak. The Grand Floral Marquee becomes 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.
Competitive classes — cut flowers, pot plants, and specialist grower exhibits — are judged by midday each day, with ribbons displayed from then on. The Garden Theatre lineup this year opens with broadcaster and horticulturist Adam Frost, continuing Southport’s tradition of drawing serious gardening names alongside its family-day-out atmosphere.
Bloemencorso Zundert: The World’s Largest Flower Parade Returns (September 6–7)
In the Netherlands, autumn opens with one of the most singular events on this list. Bloemencorso Zundert, held in the small North Brabant town on the first weekend of September, is built entirely around a single flower: the dahlia.
Twenty neighborhood teams spend the whole year cultivating dahlia fields — around eight million blooms are used in total, some six million grown locally in Zundert itself. In the final “Stick Week” before the parade, they 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 for the year’s best design. A public exhibition day on Monday lets visitors get close enough to appreciate the sheer density of flowers involved — from a distance, the most accomplished floats are detailed enough that many visitors don’t immediately register that the entire surface is made of living dahlias rather than paint or fabric. 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 rather than professional exhibitors.
Malvern Autumn Show: The UK’s Biggest Harvest Celebration (September 25–27)
Closing out the season proper, the Malvern Autumn Show returns to Three Counties Showground in Worcestershire for its 30th-plus edition, positioning 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 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 titles with marrows, giant green beans, super-sized sunflowers, and the show’s perennial headline act: enormous pumpkins.
It serves as 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. Malvern’s giant vegetables and Zundert’s dahlia floats sit at one end of that spectrum, built from months of unglamorous cultivation; Sandringham’s royal borders and Southport’s peak-season marquees sit at the other. Between them, they cover most of what a flower lover could want from an autumn.
Worth Watching For
Regional chrysanthemum and dahlia society shows run through October and into November across the UK — Bishop Auckland’s long-running Late Chrysanthemum Show typically falls in early November. 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, expect late-summer and autumn show reports to include as much discussion of irrigation and heat-stressed bedding plants as of the blooms themselves.