Thompson & Morgan

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Perennial & Biennial Plants


In this range you'll find an impressive selection of perennial plants and biennial plants, which are perfect for beginners and experienced gardeners alike. Also known as herbaceous plants, perennial plants live for 2 or more years and flower every year. Biennial plants live for up to 2 years, flowering profusely in their second year before setting seed and dying. Both are great for beds and spring displays and there are many delightful plants to choose from. Use the selections in the left menu to select the right plants for your garden.



We have found 17 products.
 

Campanula 'Mixed'

Bellflower

  • Exclusive collection
A robust mix of Campanula plants bearing semi-double, cup-shaped blooms in shades of white, purple and blue. These pretty flowers are borne in abundance on tall, slender stems from May to July, making a wonderful addition to the middle of perennial borders. Campanula 'Mixed' is ideal for creating drifts of summer colour in cottage garden borders where it will return year after year. Height: 75cm (30"). Spread: 45cm (18").
More info
    • 3 x 7cm potted plants

    • Despatch: By end of March 2015
    •  
    • £19.99
    • 6 x 7cm potted plants

    • Despatch: By end of March 2015
    • SAVE £14.99  
    • £39.98 £24.99

Penstemon 'Juicy Grape'

This popular hardy perennial deserves a prime spot in the garden. Wide trumpet shaped flowers in a fruity shade of purple appear in summer above a flush of glossy, semi-evergreen foliage. The long-lasting blooms of Penstemon 'Juicy Grape' continue well into autumn, long after other plants have run out of steam. Undemanding and easy to grow, Penstemons tolerate almost any position in the garden, regardless of rain or drought, and even resist slug damage. What more could you ask of a plant? Height: 60cm (24"). Spread: 45cm (18").
More info
    • 3 Postiplug plants

    • Despatch: By end of March 2015
    •  
    • £9.99

Salvia x jamensis 'Hot Lips'

Sage

  • New in 2014
Spice up your summer patio pots with Salvia ‘Hot Lips’. Naturally bushy plants boast eye-catching flower spikes with open-mouthed, bicolour blooms. In particularly hot weather look out for individual flowers in solid red or solid white. The aromatic foliage has a fine blackcurrant fragrance that only adds to its charm. This showy ornamental sage is perfect for cottage garden borders and containers, or incorporated into bedding schemes for a vibrant summer display. Although perennial, this half hardy Salvia will appreciate some protection from winter weather. Height: 90cm (35"). Spread: 60cm (24").
More info
    • 5 Postiplug plants

    • Despatch: By end of April 2015
    •  
    • £9.99
    • 10 Postiplug plants

    • Despatch: By end of April 2015
    • SAVE £4.99  
    • £19.98 £14.99

Nepeta 'Patchwork Mixed'

Catmint

  • New in 2014
  • Mail order exclusive
  • Splashes of colour, perennial too!
A new twist on a classic cottage garden plant! Nepeta ‘Patchwork Mixed’ has neat, compact growth that makes it perfect for summer bedding and patio pots. Catmint is well loved by gardeners and their cats for its sweet, pungent aroma and hazy pink and blue flowers. This hardy little perennial has a loose, relaxed habit that makes it perfect for creating soft, informal displays. Height and spread: 40cm (16").
More info
    • 24 plug plants

    • Despatch: By end of April 2015
    •  
    • £12.99
    • 48 plug plants

    • Despatch: By end of April 2015
    •  
    • £17.99

Nepeta 'Patchwork Mixed' (Garden-Ready)

Catmint

  • Mail order exclusive
  • Splashes of colour, perennial too!
You can plant our garden-ready plants straight into the garden when they arrive - it couldn’t be easier! There’s no need to re-pot them or to grow them on - just plant and water them. Pretty soon you’ll be enjoying their wonderful displays of colour. If you haven’t got the time or the room to grow plants from small seedlings, then these are for you! You’re sure to get great results because we’ve done the crucial early growing for you. Just plant, water and enjoy!

A new twist on a classic cottage garden plant! Nepeta ‘Patchwork Mixed’ has neat, compact growth that makes it perfect for summer bedding and patio pots. Catmint is well loved by gardeners and their cats for its sweet, pungent aroma and hazy pink and blue flowers. This hardy little perennial has a loose, relaxed habit that makes it perfect for creating soft, informal displays. Height and spread: 40cm (16").

 

More info
    • 30 garden-ready plants

    • Despatch: By end of May 2015
    • Add a 2nd pack for just £5  
    • £21.98 £14.99

Hollyhock 'Pleniflora' (Large Plant)

Alcea rosea

Hollyhocks are classic cottage garden perennials. They provide spires of ruffled, pompom blooms, which are excellent for adding colour and height to summer borders. Plant Hollyhock ‘Pleniflora’ at the back of borders for where their striking blooms will tower over lower growing plants. The nectar rich blooms will also attract bees and butterflies to the garden. Height: 2m (6.5’). Spread: 60cm (24"). More info
    • 1 x 1 litre potted alcea plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1 litre potted alcea plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Achillea filipendulina 'Coronation Gold' (Large Plant)

Yarrow

One of the very best herbaceous perennials for a mixed border, Achillea is easy to grow and a low maintenance plant. ‘Coronation Gold’ is a popular variety, which has flat heads of golden-yellow flowers over a long summer period.

Achillea loves a hot, sunny border and will add colour to your summer garden for a minimum of effort. The flower heads are incredibly eye-catching and plants are quick to establish, filling a gap in the border. Height: 1m (39"). Spread: 50cm (20").

More info
    • 1 x 1 litre potted achillea plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1 litre potted achillea plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Agastache 'Summer Glow' (Large Plant)

Giant Hyssop

This fantastic perennial is one of the best slug-proof plants for your garden. Slugs and snails dislike the felted, minty-fragranced foliage, so plants are left completely untouched.

Agastache are compact, evergreen plants, with colour-changing flowers, which are loved by bees and butterflies. Agastache plants are also very drought tolerant, and are can be grown in the border or patio pots. Height: 60cm (24"). Spread: 45cm (18").

More info
    • 1 x 1 litre potted agastache plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1 litre potted agastache plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Allium 'Gladiator' (Large Plant)

Ornamental Onion

Hundreds of starry purple blooms with delicate silvery tips form these incredible allium flower heads. The magnificent, spherical blooms of Allium ‘Gladiator’ are up to 15cm (6") across! Flowering only once in a season, the blooms are followed by skeletal seedheads for a spectacular autumn display. Undemanding and easy to grow, these purple alliums are guaranteed to add the ‘wow’ factor to borders and cut flower arrangements. Height: 120cm (48"). Spread: 15cm (6"). More info
    • 1 x 2 litre potted allium plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 2 litre potted allium plants

    • Despatch:
    •  
    • £16.99
    • Out of stock

Allium 'Globemaster' (Large Plant)

Ornamental Onion

Hundreds of starry lilac-purple blooms form the incredible flower heads of this RHS AGM variety. The magnificent, spherical blooms of Allium ‘Globemaster’ are up to 15cm (6") across! Flowering only once in a season, the blooms are followed by skeletal seedheads for a spectacular autumn display. Undemanding and easy to grow, these purple alliums are guaranteed to add the ‘wow’ factor to borders and cut flower arrangements. Height: 80cm (31"). Spread: 15cm (6"). More info
    • 1 x 3 litre potted allium plant

    • Despatch:
    •  
    • £12.99
    • Out of stock
    • 2 x 3 litre potted allium plants

    • Despatch:
    •  
    • £22.99
    • Out of stock

Allium stipitatum 'Mount Everest' (Large Plant)

Ornamental Onion

Allium bulbs are very easy to grow, and will look after themselves in the garden. Allium ‘Mount Everest’ produces globes of more than 50 star-shaped blooms during June, just after the spring bulbs, but before the summer bedding comes into flower.

Allium are ideal for dry gardens, and there is no need to lift the bulbs at the end of the season, as they are fully hardy. You will be amazed at how beautiful these flowers can be, for the minimum of effort! Height: 1.2m (3.9’). Spread: 15cm (6").

More info
    • 1 x 3 litre potted allium plant

    • Despatch:
    •  
    • £10.99
    • Out of stock
    • 2 x 3 litre potted allium plants

    • Despatch:
    •  
    • £19.99
    • Out of stock

Aquilegia vulgaris var. stellata 'Nora Barlow' (Large Plant)

Granny's Bonnet, Columbine

Aquilegia ‘Nora Barlow’ is a classic Columbine with the most gorgeous, pompom flowers. A showpiece for the cottage garden border and very easy to grow.

Aquilegia is a carefree perennial for mixed borders or large patio containers. They will grow successfully in sun or shade and are ideal for beginners to gardening. ‘Nora Barlow’ may look delicate, but it’s actually tough, resilient and easy to grow. Height: 90cm (35"). Spread: 40cm (15").

More info
    • 1 x 1 litre potted aquilegia plant

    • Despatch:
    •  
    • £9.99
    • Out of stock
    • 2 x 1 litre potted aquilegia plants

    • Despatch:
    •  
    • £16.99
    • Out of stock