Missing Collections at RHS Chelsea Flower Show 2025

Every year we highlight much-loved plant groups that are currently not in an accredited National Plant Collection and this year we are focussing on pollinator-friendly plant groups, and highlighting plants bred by Gertrude Jekyll, Valerie Finnis, Marjorie Fish and plants bred by Bees' Nursery, Cheshire . 

There are even more plant groups too, so whether you're curious about plants, big or small, we are confident that there will be a plant group to suit your passion. Find out more.

Our RHS Chelsea Flower show top ten include

Armeria: known as sea thrift or thrift, is a genus of flowering plants native to coastal and mountainous regions. Drought tolerant and attractive to pollinators.

Arbutus: Small trees or shrubs with red flaking bark and edible red berries, flowers in April and fruits in the autumn. Commonly called 'strawberry trees'.

Erysimum: ommonly known as wallflowers, are spring to summer-flowering plants that provide vibrant displays of colour. Many varieties are hardy perennials and have attractive evergreen foliage, adding structure and aesthetic value to the garden even after the flowers have faded.

Festuca: Low-growing, compact, mounding-forming plants can have green, blue or golden leaves with spikes of small flowers later in summer.

Osteospermum: Also known as Cape Daisy or African Daisy, these long-lasting colourful flowers are beautiful from summer to autumn. Another favourite with pollinators.

Pittosporum: evergreen shrubs and small trees, with glossy, leathery leaves and often fragrant flowers. Versatile plants, suitable for various garden styles and uses like hedges, borders, and foundation plantings. 

Silene: Known as campion and catchfly and attractive to pollinators. Found in hedgerows and in coastal areas in the northern hemisphere. Lychnis is now known as 'Silene'.

Stachys: low-growing perennial plants with flower and foliage interest, making them ideal for the front of borders. They prefer sun and free-draining soils but are generally tough enough to cope with most conditions. 

Trollius: Known as the globe flower, and related to Ranunculus with bright lemon-yellow or orange flowers 3-5cm in diameter from late spring into early summer.

Zantedeschia: Exotic-looking plants with large fluted flowers from white to yellow to orange to pink or purple. A few are hardy, but many are tender and need to be kept frost free.