Lede
While the first half of 2026 belonged to cherry blossoms in Taipei, tulip fields in Lisse, and major spring exhibitions in Philadelphia and London, the second half offers a grittier, more diverse floral calendar. From a debut flower show on a royal estate in Norfolk to a river of hand-built dahlia floats in the Netherlands, the coming months feature harvest festivals, giant vegetable championships, and Colombia’s largest floral parade. Here is what remains on the global flower show calendar and what each event brings.
RHS Sandringham Flower Show: A Royal Estate Opens Its Gates (July 22–26)
The biggest shakeup in British horticulture in years takes shape this summer. In 2024, the Royal Horticultural Society announced it would restructure its flower show schedule: the Hampton Court Palace Garden Festival would become biennial, and Tatton Park would shift to once every three years. In their place, the RHS launched a touring model, with new venues — Badminton Estate in July and Sandringham Estate for the first time in history.
Sandringham, the private country retreat of King Charles III and Queen Camilla, serves as the backdrop for the show’s centerpiece: the RHS Royal Legacy Garden, designed by Catherine MacDonald of Landform Consultants in consultation with the monarch himself. Early previews describe a garden built around natural fractals and branching patterns, with winding paths through a mix of trees and perennials chosen for the King’s favorite species and a bold personal color scheme. Complementing it are a series of Long Borders mentored by Chelsea veteran Tom Hoblyn and Show Gardens celebrating Norfolk’s landscapes.
Beyond the headline garden, the show includes a Floral Marquee with more than 50 specialist growers, a Flower School for 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-picked leaves. At Badminton, the RHS’s earlier debut featured Jo Thompson’s Archers 75th Anniversary Garden, a precise recreation of Bridge Farm from BBC Radio 4’s rural drama, and Tom Stuart-Smith’s Julia Rausing Garden, at 2,400 square meters reportedly the largest show garden the RHS has ever staged.
Feria de las Flores: Medellín’s Ten-Day Flower Festival (July 31–August 9)
As Sandringham ends, Colombia’s largest annual celebration begins. Medellín’s Feria de las Flores runs its 69th edition from July 31 to August 9 — 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 in 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 depicting Colombian landscapes and cultural symbols. This year’s parade will include more than 500 silleteros of all ages, including categories for children and participants with disabilities, walking a 2.4-kilometer route to Plaza Mayor, where the floral monuments remain on display for days. It is the single largest showcase of hand-carried floral craft anywhere in the world, rooted in the region’s flower-growing economy rather than garden design.
Southport Flower Show: The UK’s Biggest Independent Show at Seasonal Peak (August 20–23)
Back in England, late August belongs to Southport, the UK’s largest independent flower show, held at Victoria Park since 1924. Unlike RHS events, there are no members-only preview days — the show opens to all four days, attracting more than 55,000 visitors.
The late-August timing places perennials and annuals at their seasonal peak, making the Grand Floral Marquee particularly saturated with color. New for 2026 is “The Lakeside Reset,” a redesigned water-feature area intended as a quieter counterpoint to the showground. Competitive classes for cut flowers, pot plants, and specialist grower exhibits are judged by midday, with ribbons displayed from then on. The Garden Theatre lineup opens with broadcaster and horticulturist Adam Frost, continuing Southport’s tradition of mixing serious gardening names with a family-friendly atmosphere.
Bloemencorso Zundert: The World’s Largest Flower Parade Returns (September 6–7)
In the Netherlands, autumn opens with one of the most unique events on the calendar. Bloemencorso Zundert, held in the small North Brabant town on the first weekend of September, is built entirely around the dahlia. Twenty neighborhood teams cultivate dahlia fields year-round — roughly eight million blooms are used in total, six million grown locally — before shifting to “Stick Week,” where flowers are attached by hand onto 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 for the year’s best design. Monday’s public exhibition day allows visitors to get close enough to appreciate the density of flowers — from a distance, the most accomplished floats appear painted rather than covered in living dahlias. Founded in 1936 and listed 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: The UK’s Biggest Harvest Celebration (September 25–27)
Closing the season, the Malvern Autumn Show returns to Three Counties Showground in Worcestershire for its 30th-plus edition, positioning itself as a full harvest festival rather than a flower show in the Chelsea mold. 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 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. Malvern’s giant vegetables and Zundert’s dahlia floats sit at one end, 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
A few additional dates: 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 remain weather-dependent. Given the volatile 2026 growing season — 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.