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 13 products.
 

Dierama Collection

Angel's Fishing Rod

Clusters of delicate bell shaped flowers dangle from impossibly slender stems that arch and tremble in the breeze. From July, the elegant blooms rise above clumps of slender, semi-evergreen, grass like foliage before giving way to attractive seedheads in late summer. Dierama is a truly graceful hardy perennial and makes a most beautiful addition to cottage garden borders, adding movement and fluidity to planting schemes. Often referred to as Angel’s Fishing Rod, it looks particularly attractive when overhanging water. Height: 100cm (39"). Spread: 45cm (18").

  • Collection comprises:
  • Dierama argyruem - Dazzling white bell shaped flowers that dangle from arching stems.
  • Dierama ‘Blackberry Bells’ - Deep purple pink blooms on wiry stems.
  • Dierama erectum - Stiffer stems filled with outward facing blooms, rather than pendulous flowers.
More info
    • 3 x 9cm potted plants

    • Despatch: By end of June 2015
    •  
    • £16.99
    • 6 x 9cm potted dierama plants

    • Despatch: By end of June 2015
    •  
    • £29.99

Chrysanthemum 'Hardy Patio Mixed'

  • NEW for 2012

As the days shorten, these shimmering chrysanthemums come into their own. Bright colours and long-lasting blooms give a real boost to the autumn garden when many things are looking tired. This collection of hardy perennial patio Mums will reward you with rounded domes of colour from September right through until the first frosts. Superb for growing in borders and containers, and the sturdy stems make excellent cut flowers too. Our young plants are supplied as a mix of 4 named varieties. Height: 100cm (39?). Spread: 60cm (24?).


Companion planting: Try growing Chrysanthemums with chives, whose aromatic leaves will deter aphids.


Useful links:

Companion Planting

More info
    • 5 Postiplug plants - 1 of each colour

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

Centranthus ruber 'Albus' (Large Plant)

Valerian

If you’re looking for a hardy perennial that can cope with poor soils, then Valerian is the plant for you. Centranthus ruber ‘Albus’ will thrive when growing from the base of walls or in coastal gardens, they are very drought resistant and flower almost non-stop through the summer.

The flowering performance of Valerian is incredible, with clusters of clean white blooms from spring through to autumn. Height and spread: 100cm (39").

More info
    • 1 x 1 litre potted centranthus plant

    • Despatch: By end of June 2015
    •  
    • £9.99
    • 2 x 1 litre potted centranthus plants

    • Despatch: By end of June 2015
    •  
    • £16.99

Hosta undulata var. undulata (Large Plant)

Hosta 'Mediovariegata', Hosta 'Argentea Variegata', Plantain Lily

Hosta undulata var. undulata gives funnel shaped, lavender blue flowers on tall spikes, which are held above the neat, weatherproof clumps of foliage. The bright green leaves have a curious, twisted growth habit which gives them a fascinating appearance.

Hosta undulata var. undulata is an RHS AGM variety, which makes a fabulous addition to borders, woodland gardens and patio containers, producing the best colour in a shady position. Height: 100cm (39"). Spread: 45cm (18").

More info
    • 1 x 2 litre potted plant

    • Despatch: By end of June 2015
    •  
    • £9.99
    • 2 x 2 litre potted plants

    • Despatch: By end of June 2015
    •  
    • £16.99

Hosta sieboldiana var. elegans (Large Plant)

Plantain Lily

Hostas are easy to grow ground cover for shady borders or for growing on pots on shaded patios. Hosta sieboldiana var. elegans is an RHS Award of Garden Merit holder, which is strong-growing, clump-forming. Hosta plants will thrive in moist, damp, dark borders, or difficult, dry shady borders.

The Giant Blue Hosta has architectural, blue-green foliage, which is great for the shaded end of cottage garden borders. In the summer, the robust growth plays host to pale lilac, bell-shaped flowers appear on stems held above the foliage. Height: 100cm (39"). Spread: 120cm (48").

More info
    • 1 x 2 litre potted plant

    • Despatch: By end of June 2015
    •  
    • £9.99
    • 2 x 2 litre potted plants

    • Despatch: By end of June 2015
    •  
    • £16.99

Ligularia dentata 'Midnight Lady' (Large Plant)

Are you looking for a statement plant for your border? Ligularia dentata ‘Midnight Lady’ is the perfect choice. Giant, architectural foliage in deep bronze, with golden-orange daisy flowers on dark stems.

Ligularia plants can be grown in reliably moist soil, making them ideal for those damp, shady corners and spectacular waterside plants. Ligularia are deer and rabbit resistant, yet adored by bees and butterflies. Height: 1m (39"). Spread: 75cm (30").

More info
    • 1 x 1 litre potted plant

    • Despatch: By end of June 2015
    •  
    • £9.99
    • 2 x 1 litre potted plants

    • Despatch: By end of June 2015
    •  
    • £16.99

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: By end of June 2015
    •  
    • £9.99
    • 2 x 1 litre potted achillea plants

    • Despatch: By end of June 2015
    •  
    • £16.99

Agapanthus 'Regal Beauty' (Large Plant)

African Blue Lily

The largest flower heads of any African Lily. Each globe of ‘Regal Beauty’ is almost 30cm (12") in diameter, and is made up of hundreds of inky-blue florets. Agapanthus is robust, easy to grow and long-lasting when planted in a mixed perennial border. African Lilies can also be grown in patio pots.

‘Regal Beauty’ has been selected for its enormous flower heads of almost a foot across, it’s the perfect opportunity to show off to your gardening friends! Plants are a little less hardy than other Agapanthus, so may need some winter protection. Height: 1m (39"). Spread: 50cm (19").

More info
    • 1 x 3 litre potted agapanthus plant

    • Despatch: By end of June 2015
    •  
    • £13.99
    • 2 x 3 litre potted agapanthus plants

    • Despatch: By end of June 2015
    •  
    • £22.99

Crocosmia 'Lucifer' (Large Plant)

Montbretia

Tall arching stems drip with fiery red trumpets above crimped, sword-like foliage. Crocosmia ‘Lucifer’ is well loved for its late summer display that erupts in a blaze of colour as other border perennials begin to fade. This RHS AGM variety is renowned for its vigour and resilience, adding structure and height to sunny herbaceous borders. The tall stems make eye-catching cut flowers too.Height: 100cm (39"). Spread: 10cm (4"). More info
    • 1 x 1 litre potted plant

    • Despatch: By end of June 2015
    •  
    • £9.99
    • 1 x 2 litre potted plant

    • Despatch: By end of June 2015
    •  
    • £9.99
    • 2 x 1 litre potted plants

    • Despatch: By end of June 2015
    •  
    • £16.99
    • 2 x 2 litre potted plants

    • Despatch: By end of June 2015
    •  
    • £16.99

Liatris spicata (Large Plant)

Liatris callilepis, Gayfeather

A showy, yet easy to grow plant, Liatris spicata offers plumes of mauve florets, which make a colourful display in late summer. Plants are excellent for attracting clouds of bees and butterflies to the nectar rich flowers.

Gayfeather as it is commonly known, is a resilient and undemanding perennial for almost any part of the garden. The blooms also make a bold cut flower for vases indoors. Height: 150cm (60"). Spread: 45cm (18").

More info
    • 1 x 2 litre potted plant

    • Despatch: By end of June 2015
    •  
    • £9.99
    • 2 x 2 litre potted plants

    • Despatch: By end of June 2015
    •  
    • £16.99

Agapanthus 'Glenavon' (Large Plant)

African Blue Lily

A particularly pretty African Blue Lily that deserves a prominent spot in your garden. Agapanthus ‘Glenavon’ produces dense, rounded umbels of pale blue flowers with a violet stripe along each petal. The sturdy stems each rise to 1m (3’) above clumps of linear, semi evergreen foliage that makes useful groundcover. This hardy perennial is tough and reliable, coping well in most soils and at its best in a sunny position. Plant it in large clumps toward the middle of borders for a superb impact from July to September. Height: 100cm (39"). Spread: 50cm (20"). More info
    • 1 x 3 litre potted agapanthus plant

    • Despatch: By end of June 2015
    •  
    • £17.99
    • 2 x 3 litre potted agapanthus plants

    • Despatch: By end of June 2015
    •  
    • £27.99

Agapanthus 'Northern Star' (Large Plant)

African Blue Lily

A truly exquisite variety! Agapanthus 'Northern Star' is particularly free flowering, forming masses of rounded flower heads throughout the summer months. Each deep blue flower bears a purple stripe which matches the dark purple flush to the base of the semi-evergreen, strap-like foliage. This tall African Blue Lily is the perfect choice for the middle of herbaceous borders. Plant it in generous clumps where its blooms will rise on sturdy stems above other hardy perennials. If you can spare a few then Agapanthus flowers are also superb for cutting. Height: 90cm (35"). Spread: 45cm (18"). More info
    • 1 x 3 litre potted agapanthus plant

    • Despatch: By end of June 2015
    •  
    • £17.99
    • 2 x 3 litre potted agapanthus plants

    • Despatch: By end of June 2015
    •  
    • £27.99