LONDON — After a spring dominated by cherry blossoms in Taipei, tulip fields in Lisse and major showcases in Philadelphia and London, the second half of 2026 offers a more eclectic mix of horticultural spectacles. From a new royal flower show on the King’s Norfolk estate to a Dutch parade built from millions of dahlias, the upcoming months promise events that celebrate harvest traditions, community craftsmanship and record-breaking produce.
RHS Sandringham Flower Show: A Royal Estate Opens Its Gates (July 22-26)
The most significant shift in British flower show programming in years arrives at Sandringham Estate, the private country retreat of King Charles III and Queen Camilla. The Royal Horticultural Society’s decision to overhaul its calendar—making Hampton Court Palace Garden Festival biennial and Tatton Park a triennial event—has led to a touring model. After a debut at Wentworth Woodhouse in 2025 and a stop at Badminton Estate in Gloucestershire earlier this month, the RHS brings its show to Norfolk for the first time.
The centerpiece is the RHS Royal Legacy Garden, designed by Catherine MacDonald of Landform Consultants in direct consultation with the King. Early descriptions depict a garden inspired by fractals and natural branching patterns, with winding paths through biodiverse trees and perennials featuring many of the monarch’s favorite species and a bold personal color scheme. It is paired with Long Borders mentored by Chelsea veteran Tom Hoblyn and show gardens celebrating Norfolk’s landscapes.
Beyond the headline garden, the five-day event includes a Floral Marquee with over 50 specialist growers, a Flower School, a junior fruit and vegetable competition and a “Leaf Letters” activity where children write messages to the King and Queen on hand-chosen leaves. At Badminton, which opened the touring format two weeks prior, Jo Thompson’s Archers 75th Anniversary Garden recreated the fictional Bridge Farm from BBC Radio 4’s rural drama, complete with character-sized welly boots. Meanwhile, Tom Stuart-Smith’s Julia Rausing Garden, at 2,400 square meters, is reportedly the largest show garden the RHS has ever staged. Early reviews suggest the touring model is gaining traction.
Feria de las Flores: Medellín’s Ten-Day Flower Festival (July 31 – August 9)
As Sandringham concludes, Colombia’s flagship flower festival begins its 69th edition. Over ten days, Medellín hosts concerts, classic car parades, farmers’ markets and Antioquian folk music across more than 30 venues and 100 public events.
The festival culminates in the Desfile de Silleteros on the final Sunday. Flower farmers from the mountain community of Santa Elena carry elaborate arrangements called silletas strapped to their backs—some over three meters tall and weighing up to 80 kilograms. Built over months using dozens of flower varieties, the silletas depict Colombian landscapes and cultural symbols. This year’s parade will include more than 500 silleteros of all ages, with categories for children and participants with disabilities, walking a 2.4-kilometer route to Plaza Mayor. It remains the world’s largest showcase of hand-carried floral craft.
Southport Flower Show: The UK’s Biggest Independent Show (August 20-23)
Back in England, late August belongs to Southport, which bills itself as the UK’s largest independent flower show, running at Victoria Park since 1924. Unlike RHS events, there are no members-only preview days; the show is open to all four days, drawing over 55,000 visitors.
The late-August timing capitalizes on the seasonal peak of perennials and annuals, filling the Grand Floral Marquee with saturated color. New for 2026 is “The Lakeside Reset,” a redesigned water-feature area intended as a calming counterpoint to the busy showground. Competitive classes for cut flowers, pot plants and specialist exhibits are judged by midday each day. The Garden Theatre lineup opens with broadcaster and horticulturist Adam Frost.
Bloemencorso Zundert: The World’s Largest Flower Parade (September 6-7)
The Netherlands’ autumn season opens with a parade built entirely around the dahlia. In Zundert, a small North Brabant town, 20 neighborhood teams cultivate dahlia fields year-round—using roughly eight million blooms, six million grown locally. The final “Stick Week” before the parade involves attaching flowers by hand onto steel-and-papier-mâché float structures that can reach 19 meters long and 9 meters high.
Floats parade Sunday afternoon, judged by an independent jury, with a public exhibition Monday allowing close inspection. Founded in 1936 and recognized on the Netherlands’ national inventory of intangible cultural heritage, it remains the world’s largest flower parade, 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, positioning itself as a full harvest festival. Alongside RHS floral displays and over 100 competitive classes, 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 serves as a fitting bookend to a flower-show year defined by gardens and growers responding to season and community. Malvern’s giant vegetables and Zundert’s dahlia floats represent months of unglamorous cultivation; Sandringham’s royal borders and Southport’s peak-season marquees represent curated horticulture.
Worth Watching
Regional chrysanthemum and dahlia society shows continue through October and into November across the UK, including Bishop Auckland’s Late Chrysanthemum Show in early November. Organizers caution that most outdoor events remain weather-dependent, particularly given 2026’s volatile conditions for UK growers—including 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.