RHS Malvern Spring Festival
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Hare Spring Cottage Plants: RHS Malvern Spring Festival Master Grower 2025

The RHS celebrates the incredible work of specialist growers and nurseries through Show season with the Master Grower scheme, showcasing exhibitors with a dedicated display in the Floral Marquee.

At RHS Malvern Spring Festival 2025 the Master Growers are Hare Spring Cottage Plants, who grow hardy perennials, specialising in Camassia, Sidalcea and Uvularia. Originally based in North Yorkshire, the nursery uprooted and moved to South Devon in 2022 and have continued to thrive with mail order sales, talks, workshops, open visit days and, of course, exhibiting at flower shows. The nursery is run by husband and wife team Stella and Malcolm Exley.

Malcolm and Stella Exley
Feeling bored and restless after a long career in local government, and with the encouragement of husband Malcolm, Stella Exley bravely left her job and retrained in horticulture. This intitially led her into garden design, but a life dealing with clients, briefs and contractors wasn’t for her.

I quickly realised that I didn’t want to be stuck in an office again, I wanted to be outside with my hands in the muck.

Stella Exley

Following her lifelong love of camassias, Stella started growing and amassing plants, developing what would become three national collections of Camassia, Sidalcea and Uvularia. Having waited so long to be doing what she wanted to do, Stella immediately wanted to exhibit and got in touch with the RHS, but they suggested that she tried learning her craft at local flower shows first. It was at such an event that Stella met Garden Designer Chris Beardshaw, who asked her to grow 2,000 camassias for his RHS Chelsea Garden.

Stella’s camassias in the Gold medal-winning Morgan Stanley Healthy Cities Garden designed by Chris Beardshaw at RHS Chelsea Flower Show 2015
After growing flowers with Chris for a few more gardens, this time it was the RHS getting in touch with Stella to ask her to exhibit – which she has done ever since with great success, amassing a clutch of RHS Gold medals.

Meet the Master Growers

National Collections

Hare Spring Cottage Plants

Merging her collection with that of late collector Margaret Owen, Stella now has over 85 cultivars of Camassia. She grows everything outside and has a strict, no-nonsense test for all new plants:

If they don’t come through the winter, they’re shillly shally and emotional and they don’t get a place on the nursery.

Stella Exley

In 2022, the nursery moved from North Yorkshire to South Devon. It was a bold and dramatic upheaval at the time but, other than heavier rainfall, the only major change for the nursery has been that plants flower around three weeks earlier, or as Stella puts it; “Plants that used to be perfect for RHS Chelsea are now just right for RHS Malvern Spring.”

 

A butterfly enjoys a camassia at Hare Spring Cottage Plants
Stella has big plans for her Master Grower display at RHS Malvern Spring. There’ll be quirky, personal touches along with the beautiful educational Camassia displays for which Hare Spring Cottage Plants have become famous.

Camassia really crave moisture – unlike most bulbs. If you’ve got difficult, soggy, boggy areas, camassias will be incredible.

Stella Exley

Camassia care tips

  • The only people who would struggle to grow Camassia are those with free-draining, sandy soil. Otherwise, any space can have camassias, whether you’ve a herbaceous border or acres of land for naturalistic swathes of flowers.

  • If you want to grow in containers, in the third year you’ll want to split them, to make sure they don’t dry out.

  • Camassia should get enough moisture from the ground, but if you have a few dry weeks, do water them.

  • Remember, slugs hate camassias!

  • Try varieties ‘Maybelle’ and ‘Blue Danube’ for the deepest lush purples.

Camassia ‘Blue Danube’
Camassia ‘Maybelle’

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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.