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Tall Perennial Plants

If your beds are lacking height, you need tall perennial plants! Growing up to 2m in some cases, these striking plants create a colourful backdrop to any floral display, helping you make the most of your vertical space even in a small garden. Tall perennials look fantastic contrasted with green foliage, in a layered herbaceous border or in containers on their own.

Tall Perennials for Borders

Perennial plants are ideal for giving height and structure to the back of a mixed border, providing a colourful vertical backdrop for smaller plants - but there are so many other ways they can be used. Plant them in groups for a dense hit of colour, or use as single accents amongst medium sized plants for a less formal cottage garden style scheme. Tall perennials are also perfect if you want to screen a less than attractive wall or fence - they’re quicker to grow than trees and easier to maintain than a climber.

Tall Perennials for Pots

Tall perennials really shine in a container display. Give them pride of place in the middle of your pot and surround them with more compact upright and trailing varieties, or make a statement by packing the pot with one species or colour. Use your perennial pots to give height and variation to a collection of containers on the patio or place them at either side of your front door as a colourful alternative to trees.

Which are the tallest Perennial Plants?

If you want jaw-dropping height, you need Hollyhocks! These stunning flowers grow on strong stems up to 2m tall. Close behind them are Delphiniums at up to 1.7m, then Foxgloves, Achillea, Verbena and Gladioli which all come in at around the 1m mark.

Caring for Tall Perennials

Tall perennials can be at risk of bending or falling over in the wind. To prevent this, make sure you plant them in a sheltered part of your garden - against a fence is ideal. For extra support, plant in groups or amongst other tall plants. You can also tie them in to a stake or support structure - using fallen tree branches helps to give a natural look, or you can use rows of string nailed to a fence. Tie your plants in quite loosely to allow for growing space.

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Lupin Legendary 'Shades of Blue' | 1L Pot
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Lupin Legendary 'Shades of Blue' | 1L Pot
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Towers of sweet summer blue

  • Stunning blue and violet tones
  • Create a Cottage Garden aesthetic
  • Towers 90cm tall–perfect for the back of borders
  • Buy a mature plant ready to shoot up!
6 Aquilegia Spring Magic Collection 10.5cm
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6 Aquilegia Spring Magic Collection 10.5cm
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A collection of enchanting colours

  • Specially selected summer tones of Blush Pink, Violet Blue and Daisy White
  • Hardy perennials with bushy foliage and flowers on upright stems
  • The perfect collection to bring colour to your borders
  • Flowers from May to July
Lupin Legendary 'Shades of White' | 1L Pot
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Lupin Legendary 'Shades of White' | 1L Pot
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Grow a skyline of glistening white spires

  • Glistening white towers of lupin blooms
  • A real bee's favourite!
  • Towers 90cm tall–perfect for the back of borders
  • Buy a mature plant ready to shoot up!
Bleeding Heart Plant 'Spectabilis Valentine' | Dicentra | 3L Pot
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Bleeding Heart Plant 'Spectabilis Valentine' | Dicentra | 3L Pot
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Romance flowering from Spring

  • Red heart-shaped flowers with a drip of white
  • RHS Award of Garden Merit winner
  • Blooms in Spring early in the growing season
  • Can be grown in the shadier parts of your garden
Aquilegia 'Spring Magic White' | 10.5cm Pot
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Aquilegia 'Spring Magic White' | 10.5cm Pot
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White stars towering above a sea of green

  • Pure daisy-white flowers amongst a bed of green
  • Makes brilliant ground cover for border beds
  • Compact growth and tall flower stems
  • Makes stunning cut flowers for floral bouquets
Aquilegia 'Spring Magic Blue & White' | 3L Pot
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Aquilegia 'Spring Magic Blue & White' | 3L Pot
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Profusions of blue and white stars on a sky of green

  • Masses of sweet summer blue and white flowers
  • Luscious green foliage makes great ground cover
  • Buy almost fully grown ready to bloom
  • Flowers from May to July
Lupin Legendary 'Shades of Pink' | 1L Pot
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Lupin Legendary 'Shades of Pink' | 1L Pot
0 options from £8.00

Legends are pink

  • Towering spires of sweet pink floral pods
  • Create a Cottage Garden aesthetic
  • Towers 90cm tall–perfect for the back of borders
  • Buy a mature plant ready to shoot up!
Lupin Legendary Shades Collection | 6 x 1L Pots
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Lupin Legendary Shades Collection | 6 x 1L Pots
0 options from £30.00

A legend in their own flowerbed

  • Towering stems of Snow White, Candy Red, Fuchsia Pink and Indigo Blue
  • 6 x Lupin plants
  • Hardy perennials flowering from May to June
  • Brings height and colour to any border or bed
Penstemon Pristine Scarlet 10.5cm
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Penstemon Pristine Scarlet 10.5cm
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Spires of outstanding Scarlet flowers

  • Lusciously vibrant Scarlet flowers
  • Deep green waxy leaves gives a beautiful contrast
  • Flowers from midsummer to Autumn
  • Great plant for the middle of a border scheme
Aquilegia 'Spring Magic Rose & White' | 10.5cm Pot
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Aquilegia 'Spring Magic Rose & White' | 10.5cm Pot
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Pink and white bursting from a bed of green

  • Sweet blush-pink funnel flowers in abundance
  • Attractive green foliage makes great ground cover
  • A fantastic border bed plant for a cottage garden aesthetic
  • Flowers from May to July
Penstemon 'Pristine Lilac Purple' | 10.5cm Pot
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Penstemon 'Pristine Lilac Purple' | 10.5cm Pot
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Breathtakingly deep purples right through from Summer to Autumn

  • Stunningly deep and vibrant violet purple flowers
  • Deep green waxy leaves gives a beautiful contrast
  • Flowers from midsummer to Autumn
  • Great plant for the middle of a border scheme
Lupin Legendary 'Shades of Red' | 1L Pot
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Lupin Legendary 'Shades of Red' | 1L Pot
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A truly legendary red lupin

  • Incredibly vibrant red flowers from early summer
  • Create a Cottage Garden aesthetic
  • Towers 90cm tall–perfect for the back of borders
  • Buy a mature plant ready to shoot up!
Aquilegia 'Bordeaux Barlow' | 10.5cm Pot
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Aquilegia 'Bordeaux Barlow' | 10.5cm Pot
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A superb red from Bordeaux

  • Layers of crimson red petals atop tall green stems
  • Adds early colour in your garden
  • Grows perfectly well in areas of partial shade
  • Adds dynamic height to your border beds
Aquilegia 'Denver Gold' | 10.5cm Pot
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Aquilegia 'Denver Gold' | 10.5cm Pot
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Let gold burst forth from the ground!

  • Masses of Daffodil-like yellow flowers
  • Perfect for rustic cottage garden aesthetics
  • Makes for excellent ground cover
  • Grows perfectly well in areas of partial shade
Aquilegia 'Red Hobbit' | 10.5cm Pot
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Aquilegia 'Red Hobbit' | 10.5cm Pot
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Summer flowers of strawberries and cream

  • Sweet summer colours of strawberries and cream
  • Flowers from May to July
  • Perfect for rustic cottage garden aesthetics
  • Makes stunning cut flowers for floral bouquets
Aquilegia 'Spring Magic Blue & White' | 10.5cm Pot
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Aquilegia 'Spring Magic Blue & White' | 10.5cm Pot
0 options from £6.00

Deepest blues brighten up your summer garden

  • Unique bright violet and white flowers
  • Luscious green foliage makes great ground cover
  • Compact growth and tall flower stems
  • Flowers from May to July
Penstemon 'Dark Towers' | 1L Pot
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Penstemon 'Dark Towers' | 1L Pot
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Dark towers with bright lilac purple lights

  • Profusions of delicate, lilac flowers from midsummer
  • Stunning plum-purple foliage adds extra aesthetic interest
  • Flowers all the way from July to November
  • Create a tropical aesthetic for your garden
Bleeding Heart Plant 'Spectabilis Alba' | Dicentra | 3L Pot
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Bleeding Heart Plant 'Spectabilis Alba' | Dicentra | 3L Pot
0 options from £15.00

Blooms of white hearts in spring

  • Fantastic daisy-white heart-shaped flowers
  • Blooms in Spring early in the growing season
  • RHS Award of Garden Merit winner
  • Can be grown in the shadier parts of your garden
Aquilegia 'William Guiness' | 10.5cm Pot
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Aquilegia 'William Guiness' | 10.5cm Pot
0 options from £6.00

Deepest purple summer blooms from leaves of luscious green

  • Deliciously deep plum purple flowers
  • Makes brilliant ground cover for border beds
  • Flowers from May to July
  • Provides rich early summer flowering
Penstemon 'Quartz Red' | 3L Pot
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Penstemon 'Quartz Red' | 3L Pot
0 options from £15.00

Add a splash of blazing colour to the summer

  • Crimson red bell-shaped flowers on dark stems
  • Flowers from June to September
  • Adds blazing colour to a Cottage Garden border
  • Attracts bees and butterflies
Penstemon 'Garnet' 2L Pot
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Penstemon 'Garnet' 2L Pot
0 options from £12.00

Rich wine-red flowers on tall stems

  • Deep red flowers on tall upright stems
  • Flowers from July to November
  • Ideal for the middle or back of a border
  • Perfect for Pollinators
Agapanthus 'Fireworks' 3L Pot
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Agapanthus 'Fireworks' 3L Pot
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Two toned flowers to light up your borders

  • Two tone White and Violet flowers
  • Flowers from June to September
  • Hardy and disease resistant
  • RHS Chelsea Flower Show Plant of the Year Finalist
Aquilegia 'Spring Magic White' | 3L Pot
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Aquilegia 'Spring Magic White' | 3L Pot
0 options from £18.00

White stars towering above a sea of green

  • Pure daisy-white flowers amongst a bed of green
  • Makes brilliant ground cover for border beds
  • Compact growth and tall flower stems
  • Buy an almost fully-grown plant ready to bloom!
Penstemon 'Quartz Rose' | 3L Pot
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Penstemon 'Quartz Rose' | 3L Pot
0 options from £15.00

Fabulous and Flamingo coloured

  • Flamingo pink flowers standing in bright green foliage
  • Long flowering period from June to September
  • Perfect for an eye catching patio display
  • Perfect for Pollinators

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