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Here come the top 10 perennials!

How could you not be excited by April and May in the garden...

when the earth beneath your feet is erupting into a growing frenzy? The most thrilling thing about this time of year is the fact that the potential of what’s happening has yet to be discovered. Even if your plants are those that were there last year, nature always throws up a few surprises. Then there are the variations that occur because of the weather and growing conditions, meaning that no two years are exactly the same.

spring in the garden The garden is springing into glorious life!

Added into the mix is the joy of planting more wonders into your beds and watching what happens. The relationship between different plants can create some pretty amazing combinations. Dedicated gardeners and horticulturalists will make notes of what works well together and many people are continually trying different partnerships and groups in a bid to achieve perfect harmony.

Perennials are the most amazing plants in the garden, because they display such a vivid change between winter and summer. Just four or five weeks ago there was little to be seen from perennials that had died back to the ground over winter, as they do. But now they are sprouting fresh growth which is transforming gardens across the country. And nothing quite matches the explosion of interest in this group of plants that has taken place over the past 20 years or so.

garden perennials coming into flower An explosion of growing is taking place in the garden.
Back in the 1980s and before this time:

The majority of householders used annual plants during the summer to fill up their gardens with vivid colour. It’s easy to see that bedding plants are reliable. You know what you’ll be getting – all you need to do is to choose the variety and colour, then dedicate some time and effort to planting. The perfect summer garden, back in the day, contained hundreds of gaudy annuals, all flowering their socks off. Bedding schemes are still in evidence in some municipal parks and open spaces, and particularly by the seaside. It was all or nothing. Bare beds all winter and early spring, until danger of frost had passed. then – tadaa – an eruption of colour.

Petunias in red and pink with a star There's no mistaking the vivid show of annual flowers. These are Petunia 'Star' mix.

There’s no doubt the displays are eye-catching, but they also sit in a time-warp. Most of today’s serious gardeners want longer-lasting plants that will grow and develop as the years progress. They are continually adding interest and generally favour a full-bed, with very little bare soil to be seen. There’s always room for just one more plant!

mix of perennial flowers in summer Who couldn't love a flowerbed that looks like this?

 

Top ten perennials
SALVIAS
Salvia or sage blue flower A deep blue Salvia flower
  • Well, how could this genus not appear when there are so many varieties (more than 900, to be precise)? The majority are really good at providing colour a little later in the season when some of the other perennials are beginning to flag. Great Comp garden, an RHS partner garden near Sevenoaks, (greatcompgarden.co.uk), plays host to one of the most diverse collection of Salvias in Europe. Salvia ‘Amistad’ is one of the most popular, with its woody habit and deep purple flowers. But Salvias come in reds, pinks, whites and many shades of blue. There are also annual varieties of Salvia too, but they are no match for the real thing!
VERONICA
Veronica blue flowers The blue spires of Veronica are delightful in the summer garden
  • This is another border beauty that comes in many different shapes, sizes and colours. The flowers come in delightful spires, from whites and pinks through to blues and purples. Give them sunshine and keep dead-heading throughout the summer and Veronica will reward you with blooms for several months.
Hardy geraniums
hardy geranium blue purple flower Hardy geraniums can survive in drought conditions and their flowers keep coming all summer long
  • Geraniums are mounding perennial flowers that deserve a mention because they are so diverse in habit, colour and appearance. Some hardy Geraniums are thugs and take over without you realising, whilst others, such as G. ‘Rozanne’ are charmers. Flower colour comes in blue, white, pink, mauve and more and these plants can provide blooms from June right through to October.
Helianthus
Sunny yellow flowers of Helianthus Who couldn't love sunflowers in all their different forms?
  • The sunflower family of Helianthus are best for providing good cheer! Their sunny faces come in yellows, golds, oranges, terracotta, mauve, purple and even red. They form delightful, spreading clumps which should expand gradually as the years progress. Some, however, are annual varieties, but all are worth a space in a sunny garden.
RUDBECKIA
coneflower or yellow rudbeckia Rudbeckia are also known as coneflowers
  • Also providing a splash of sunshine is Rudbeckia, particularly R. fulgida var. sullivantii ‘Goldsturm’. This has deep yellowy-orange petals with a chocolate central cone, held aloft on stiff, 80cm stems. It looks wonderful in a thick clump, repeated in drifts around the garden. One of the reasons it’s so highly valued is because of its long flowering season, from July through to October. Beautiful!

LEUCANTHEMUMS

white leucanthemum The Shasta daisy, or Leucanthemum - is a garden beauty.
  • Everybody loves a daisy, and Leucanthemums look like giants of the daisy world, with their yellow centres and bright, white petals. You’ll not be surprised to learn that there are now many different varieties including pale lemon with a chocolate centre. These are trouble-free, all they need is a bit of staking for the longer-stemmed varieties, and regular dead-heading to keep the flowers coming.
IRIS

https://perfectplants.co.uk/catalogsearch/result/?q=iris

  • Strappy leafed plants are invaluable for adding structure to the perennials garden, and there are many forms from which to choose. Irises are now available in a huge variety and perhaps one of the best-loved is the variegated leafed bearded Iris pallida ‘Argentea Variegata’. Its foliage is striped, thus providing interest all spring and summer, and the soft lavender-blue flowers appear for many months. Not only this, but it’s a trouble-free plant which is easy to grow in a sunny spot.
WHICH BRINGS US AROUND TO CROCOSMIA
red Crocosmia The strappy-leafed Crocosmia with its summer flowers on stalks.
  • Crocosmia is a distant cousin within the Iris family. This is a delightful South African perennial that has great style. Its strappy leaves look effective cascading along a bank or next to a garden path. Then those wonderful orange, yellow or red flowers emerge on stalks from July through to September. Plant it in a sunny spot and make sure it gets some water as it does love good soil and a downpour. One of the best one metre tall varieties is C. ‘Lucifer’, with its scarlet flowers, but there are more diminutive types too, including C. ‘Twilight Fairy Gold’ and C. ‘Emily McKenzie’. They might need a little tlc during the winter but are generally hardy if sited in a sheltered spot.

HEMEROCALLIS

yellow Hemerocallis Bright and beautiful Hemerocallis
  • In a similar style are the popular Hemerocallis, or day lilies. The varieties available today are diverse, with lily-like flowers in colours of oranges, reds, yellows, purples, mauves, whites and creams. These look stunning planted in drifts and although the flowers last but a day, they are produced in profusion over a long period. Trouble-free, these are well-worth seeking out.
ORNAMENTAL GRASSES
ornamental grasses in the winter garden The vertical winter form of Calamagrostis 'Karl Foerster'
  • No list would be complete without grasses. Deciduous grasses act in a perennial way, but we generally keep the old stems intact over the winter because they look so amazing. One of the most popular is the vertical Calamagrostis x acutiflora ‘Karl Foerster’ which keeps its shape even through strong winds down on the coast. Invaluable for structure in the garden, and beautiful too.