RHS Harlow Carr: Candelabra Primulas, Blue Poppies And Other Treasures

Candelabra primula Harlow Carr hybrid

Harlow Carr is no longer the Royal Horticulture Society’s only northern garden, and not the biggest, but has the benefit of an extra 70 years or so of continuous cultivation. Highlights for me include wonderful collections of primula and meconopsis, typically in flower around mid June to early July. The collections mingle in naturalistic drifts, their bold colours sparkling like jewels in their stream-side setting.

Orange candelabra primula

The renown of Harlow Carr’s candelabra primula hybrids has spread beyond the gardens, and deservedly so. Tiered whorls of flowers open from tight clusters of darker buds, facing outwards around sturdy stems. Their warm colours include some beautiful pastels. Technically, they are Primula japonica hybrids with elements of P. bulleyana, P. beesiana and P. pulverulenta in the mix.

Brightly coloured Candelabra Primulas at Harlow Carr

The overall effect of these bog-loving plants is dazzling on a midsummer day.

Primula alpicola
Primula alpicola

If you can turn your eyes away from the pull of the candelabras, you’ll see many other species of primula, and so much more.

Candelabra primulas with meconopsis

The statuesque plant towering like a lighthouse over a tumult of primulas is a pink meconopsis; blue meconopsis are towards the back left. Meconopsis species are members of the poppy family (Papaveraceae) that hybridise readily, so are difficult to identify. Their silky petals typically nod or droop giving the flowers a hooded appearance.

Blue meconopsis at Harlow Carr

Harlow Carr has a long history of growing meconopsis, formerly using a blue poppy as its logo, and makes growing them seem effortless. Still, regular visitors will notice some ‘drifting’ around the stream side borders from season to season as specimens die and new areas are planted.

While meconopsis enjoy Harlow Carr’s humus-rich, acidic soil and dampness, the average gardener will not find them easy to maintain. Many forms are short lived or monocarpic, dying once they have flowered.

Blue poppy

All the more reason to visit them here – blue poppies are sensational, while they last. Even their hairy foliage is beautiful from the time when it first emerges, glistening, in spring. I loved how the one above was rippled lavender and blue.

Blue poppies are the best-known of the meconopsis, but Harlow Carr also has white, cream, pink, red, purple and yellow forms, some in the woodland borders, all worth searching for.

Arisaema with striped flowers at Harlow Carr

Look closely, because other woodland treasures are easy to miss, such as the Arisaemas which hold their flowers well below their leaves.

This dusky one is Arisaema speciosum var. magnificum. It may be weird to say any plant is weird, but what do you think?

Tiarella won’t let the primulas and meconopsis do all the sparkling

Visitors who love unusual plants would do well to explore the terraces and woodland border behind the Old Bath House. It’s a pure joy to wander in a floral woodland, even after the spring peak has abated.

Woodland eventually gives way to wildflower meadows, studded with common orchids at this time of year.

Astrantia and corydalis
Astrantia with corydalis

Our most recent visit to Harlow Carr was on the eve of the annual Flower Show which could have meant chaos, but not at all. The garden is expansive enough to stay serene.

Heuchera display at RHS Harlow Carr's flower show

Where plant stands were emerging, activity added to an atmosphere of anticipation.

Floral selfie frame with sunflowers
We watched as floral designers put the finishing touches to this year’s selfie frame, which was impressive as ever. It was heavily backlit by the high, midsummer sun, but you’ll get the gist.

Sweet peas
Sweet peas

The whole garden was basking in sunshine. In one of the kitchen garden areas, sweet peas were fragrant enough to halt this by-passer in her tracks.

Blue iris at Harlow Carr garden

While I’ve not so far mentioned the irises, their rich blues and purples would be a highlight elsewhere.

White peony at Harlow Carr

We had missed the stately alliums, which were starting to go to seed, but peonies and roses offered ample compensation.

Yellow peony

We’d not visited Harlow Carr since the start of the pandemic and were impressed by the changes made. In particular, a varied planting of David Austin’s roses has been added, including recent new varieties as well as old favourites. The roses are still fairly young, but already look great.

Rosa 'Harlow Carr'
Rosa ‘Harlow Carr’

I’ve never been disappointed by a visit to RHS Garden Harlow Carr, and in case you think that given the sight of a flower, I am contented, that’s not always the case. I can be highly critical, and judge gardens on the terms they claim for themselves.

Lily pond with white arums

If you think a major garden ought to be well-maintained, inspirational and educational, Harlow Carr will tick all those boxes. Add a sculpture trail that is often refreshed; kitchen gardens; broad, long flower borders; an alpine house of tiny treasures; children’s play areas; ponds; a winter walk; a library (and excellent bookshop); and I’m more than contented, at any time of year.

Giant bee made from wicker
Wicker bee

Check out the Harlow Carr section of the RHS website for visitor information. RHS members can visit any of the society’s five gardens, as often as they want, for free, and take a friend along too.

I hope readers who live too far away to visit Harlow Carr have enjoyed my latest pictures from the garden and are lucky enough to have one or more favourite gardens within reach of home.  

45 Replies to “RHS Harlow Carr: Candelabra Primulas, Blue Poppies And Other Treasures”

    1. We recently found large drifts of insect eating plants on local moorland. I’d have loved to take a picture, but the surrounding area was quaking bog, so we couldn’t get near enough.

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