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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.

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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'

Towers of sweet summer blue

1 option from from £15.00
  • 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!
Aquilegia 'Black Barlow'

Intensely dark - a must-have!

1 option from £5.00
  • Deepest purple, almost black pompom shaped flowers on slender stems
  • Flowers from April right through to July
  • Brings colour and contrast to borders
  • Attractive to bees and butterflies
Lupin Legendary 'Shades of White'

Grow a skyline of glistening white spires

1 option from from £15.00
  • 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!
Lupin Legendary 'Shades of Red'

A truly legendary red lupin

1 option from from £15.00
  • 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!
Agapanthus 'Fireworks' 3L Pot

Two toned flowers to light up your borders

1 option from £20.00
  • 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 Blue & White'

Enchanting blue and white blooms

1 option from from £6.00
  • Blue and white bonnet-shaped flowers with golden yellow stamens
  • Flowers from April right through to July
  • A compact variety suitable for borders or pots
  • RHS Plants for Pollinators
Agapanthus 'Blue Thunder'

A deeper shade of blue

1 option from £6.00
  • Intensely blue clusters of flowers on strong stems
  • Flowers all summer from June to September
  • Eyecatching in large containers
  • Suitable for cutting
Penstemon 'Pensham Czar'

Vibrant purple and white penstemon

1 option from £6.00
  • Large, plum-purple flowers with white throats
  • Flowers from June to October
  • Easy to grow and perfect for pots
  • RHS Plants for Pollinators
Agapanthus 'Silver Baby'

Shimmering white with a hint of blue

1 option from £6.00
  • Bright white flowers flushed with a hint of blue, rising from deep green foliage
  • Long summer flowering from June to September
  • Plant in a sunny border or a large container
  • RHS Award of Garden Merit winner
Penstemon 'Pensham Wedding Day'

Bright white bee-friendly blooms

1 option from £6.00
  • Lace white clusters of flowers on slender stems
  • Flowers from June to October
  • Ideal for cottage garden borders
  • RHS Plants for Pollinators
Agapanthus 'Royal Velvet' 3L Pot

Spires of plush Purple stars

1 option from £20.00
  • Deep Purple star shaped flowers
  • Flowers from June to September
  • Hardy, drought-tolerant perennial
  • Vibrant tones for containers or borders
Agapanthus 'Lapis Lazuli' 2L Pot

Jewel-toned evergreen Agapanthus

1 option from £20.00
  • Bright blue star shaped flowers
  • Long flowering from June to September
  • Sparkles in patios, beds and borders
  • Perfect for Pollinators
Aquilegia 'William Guiness'

Deepest purple summer blooms from leaves of luscious green

1 option from from £18.00
  • Deliciously deep plum purple flowers
  • Makes brilliant ground cover for border beds
  • Flowers from May to July
  • Provides rich early summer flowering
Agapanthus 'Ever White' 3L Pot

Clusters of White on towering stems

1 option from £20.00
  • Snowy White star shaped flowers
  • Early flowering from May to September
  • Ideal for Cottage Garden borders or patio pots
  • RHS Award of Garden Merit winner
Agapanthus 'Sweet Surprise' 3L Pot

The sweetest two-toned Blues

1 option from £20.00
  • Clusters of little Pale and Dark Blue flowers
  • Long flowering from June to September
  • Ideal for the middle of a border
  • Attracts bees and butterflies
Penstemon 'Sour Grapes'

Cottage Garden must-have in rich Purple

1 option from from £6.00
  • Deep purple flowers on tall upright stems
  • Flowers from July to November
  • Adds height to a Cottage Garden border
  • Attracts bees and butterflies
Agapanthus 'Ever Sapphire' 3L Pot

Spires of Deep Blue starry flowers

1 option from £20.00
  • Velvet Blue star shaped flowers
  • Early flowering from May to September
  • Easy to grow drought-tolerant plants
  • Attracts bees and butterflies
Gladioli 'Nori' 2L Pot

Tall stems of Violet blooming all Summer long

1 option from £12.00
  • Violet flowers with Creamy White inners
  • Flowers right from June to October
  • Perfect to add height to borders or pots
  • Attractive to pollinators
Gladioli 'Rose Supreme'

Eyecatching flamingo pink on towering stems

1 option from £6.00
  • Tall stems bearing large flamingo pink flowers
  • Flowers from June to August
  • Impressive in pots or borders
  • Ideal for cutting
Penstemon 'Electric Blue' | 2L Pot

Electric Blue Penstemon sparks interest in borders

1 option from £12.00
  • Electric blue flowers tinged with purple
  • Summer flowering from June to September
  • Ideal for the middle or back of a border
  • Adored by bees
Gladioli 'Purple Flora'

Giant stems of velvety purple flowers

1 option from £7.00
  • Towering stems of large purple blooms
  • Flowers from June to August
  • Plant in groups in a sunny border
  • Suitable for containers
Gladioli 'Fidelio'

Big, bold spires of magenta blooms

1 option from £5.00
  • Giant spires of large, velvety magenta flowers
  • Flowers from June to August
  • Plant in sunny borders and containers
  • Fantastic as cut flowers
Aquilegia 'Spring Magic Rose & White'
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Aquilegia 'Spring Magic Rose & White'

Pink and white bursting from a bed of green

0 options from £6.00
  • 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
Aquilegia 'Bordeaux Barlow' | 10.5cm Pot
Sold out
Aquilegia 'Bordeaux Barlow' | 10.5cm Pot

A superb red from Bordeaux

0 options from £6.00
  • 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

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