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.


For beautiful summer flowers browse our range of annual plants.



We have found 66 products.
 

Shasta Daisy 'Goldfinch' (Large Plant)

Leucanthemum × superbum

This exciting modern cultivar is the most yellow Leucanthemum to date. The semi double blooms of Shasta Daisy 'Goldfinch' open a bright lemon colour that slowly fades to pale ivory as the blooms age. This compact variety is well branched and bushy, flowering for weeks from late spring onwards and attracting bees and butterflies to its nectar rich blooms. This reliable hardy perennial is undemanding and easy to grow in borders and wildlife areas. It also makes a lovely cut flower. Height and spread: 60cm (24").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted leucanthemum plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 3 litre potted leucanthemum plants

    • Despatch: By end of September 2016
    •  
    • £19.99

Foxglove 'Milk Chocolate' (Large Plant)

Digitalis parviflora

Rich chocolate coloured flowers tightly fill the slender flower spikes of this superb Foxglove. Digitalis parviflora 'Milk Chocolate' is a rarely seen variety with glossy foliage that complements the unusual blooms. Native to Spain, this Foxglove is surprising hardy and enjoys a lightly shaded position in the garden. The nectar rich blooms prove particularly attractive to bees, making this a useful addition to wildlife areas. Pair it with white flowered Digitalis for a particularly elegant contrast. Height: 60cm (24"). Spread: 30cm (12").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 1 litre potted digitalis plant

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted digitalis plants

    • Despatch: By end of September 2016
    •  
    • £14.99

Agapanthus 'Twister'

African Blue Lily

  • Stunning Bicolour flowers
  • Perfect for striking patio displays
  • Mid to Late Summer Flowering
Here's a plant that will stand out from the crowd in your garden - the first ever deciduous bicolour Agapanthus. This African lily is robust, and truly hardy in the UK meaning it's perfect in the garden border as well as in a patio container. The flowers of Agapanthus 'Twister' are absolutely glorious, with crystal white flutes turning inky blue at the tips. The huge globes of colour appear from mid to late summer, hosted on strong, sturdy stems that need no staking. Height: 60cm (24"). Spread: 50cm (20").

Why not add a patio pot to your order? - perfect for planting up your Agapanthus plants!
More info
    • 1 x 9cm potted agapanthus plant

    • Despatch: By end of September 2016
    •  
    • £13.99
    • 2 x 9cm potted agapanthus plants

    • Despatch: By end of September 2016
    •  
    • £19.99

Phlox paniculata 'Laura' (Large Plant)

Phlox paniculata 'Laura' is a particularly fine variety with a long flowering period and good resistance to mildew. This magnificent perennial produces panicles of lilac purple flowers with starry white centres all summer long. The tall stems make superb cut flowers that will fragrance bouquets with their rich, heady scent. This clump forming perennial Phlox is perfect for cottage garden borders where its blooms will attract attention from pollinating insects. Height and spread: 90cm (36").,

Culinary note: Some parts of these flowers are edible. Add the small flowers to fruit salads or crystallise them for decorating desserts. For more details about edible flowers click here.

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted phlox plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 2 litre potted phlox plants

    • Despatch: By end of September 2016
    •  
    • £19.99

Perennial Ground Cover Collection

Our ground cover collection of hardy herbaceous perennials brings so many benefits, which all lead to one thing: low maintenance gardening. We've selected some of our best low-growing perennials to offer a range of planting solutions. Use them as front of border plants in large sunny borders or set them in dappled shade as underplanting to trees and shrubs. You can even try them in pots and use your new perennial containers alongside seasonal pots. Every plant in the mix offers a controlled spreading habit, helping to quickly fill borders, cover soils and prevent weeds taking hold. And less weeding leads to more time spent enjoying your garden!


  • Perennial Ground Cover Collection comprises:
  • Arabis 'Lotti Pink' - A spring flowering, cushion-like perennial.
  • Armeria 'Ballerina Mixed' - Dense cushions of bright green foliage produce spherical flower heads set atop sturdy upright stems.
  • Dianthus deltoides 'Red' - Neat clumps of silver green foliage that makes stunning ground cover.
  • Campanula 'Dwarf Blue' - Cushion-like plants, which are smothered in violet-blue flowers through the summer months.
  • Aubrieta 'Mixed' - These tough little plants will thrive in the poorest of soils, forming dense mats of evergreen foliage.
  • Erigeron 'Stallone' - This cheery clump forming perennial enjoys light sandy soils, making it ideal for coastal gardens.

Powerliner® plugs are well established, mature plugs which can be potted on or can be planted straight into the border or containers. Each plug module is 6.5cm in diameter.
More info
    • 6 Powerliner plug plants - 1 of each variety

    • Despatch: By end of October 2016
    •  
    • £8.99
    • 12 Powerliner plug plants - 2 of each variety

    • Despatch: By end of October 2016
    •  
    • £12.99

Lupin 'Noble Maiden' (Large Plant)

Lupinus

No cottage garden would be complete without the well loved Lupin, and this one is stunning in its simplicity. Tall spires of snow white blooms rise above clumps of palmate foliage in early summer. Lupin 'Noble Maiden' makes a particularly effective choice for brightening dappled shade in woodlands, where its pale flowers appear luminescent. Height: 90cm (36"). Spread: 75cm (30").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted lupinus plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 2 litre potted lupinus plants

    • Despatch: By end of September 2016
    •  
    • £19.99

Erodium manescavii (Large Plant)

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 1 litre potted erodium plant

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

    • Despatch:
    •  
    • £14.99
    • Out of stock

Phlox paniculata 'Peppermint Twist' (Large Plant)

Perennial Phlox

Delightfully dwarf, this perennial Phlox reaches just 45cm (18") tall! Charming pink and white pinwheel blooms will fill the air with the most exquisite fragrance. With its neat, bushy habit, Phlox paniculata 'Peppermint Twist' is perfect for patio containers - plant it next to a doorway where you can really appreciate their fragrance. Highly attractive to pollinating insects, this pretty variety will brighten up the front of borders, and also makes a pleasing cut flower. Height and spread: 45cm (18"). ,

Culinary note: Some parts of these flowers are edible. Add the small flowers to fruit salads or crystallise them for decorating desserts. For more details about edible flowers click here.

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted phlox plant

    • Despatch: By end of September 2016
    •  
    • £12.99
    • 2 x 2 litre potted phlox plants

    • Despatch: By end of September 2016
    • SAVE *£5.99  
    • £25.98 £19.99

Lupin 'Russell Hybrids Mixed' (Large Plant)

Lupinus

Tall spires of tightly packed flowers rise above clumps of palmate foliage in a magical array of colours. This wonderful mix of the ever popular 'Russell Hybrids' is ideal for adding height and structure to the back of perennial borders and woodland edges. A distinctive hardy perennial that remains a cottage garden favourite. Height: 90cm (36"). Spread: 50cm (20").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted lupin plant

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 2 litre potted lupin plants

    • Despatch: By end of September 2016
    • SAVE *£2.99  
    • £19.98 £16.99

Geranium 'Brookside' (Large Plant)

Hardy Geranium, Cranesbill

Intensely blue, saucer shaped flowers with prominent maroon veins make a captivating display throughout summer. Although a relatively new introduction, hardy Geranium 'Brookside' has already become a garden favourite for it exquisite colour. Awarded a coveted RHS AGM, this superb hardy perennial produces finely cut foliage with a spreading habit for weed suppressing ground cover. Cranesbills are cottage garden classics - easy to grow and perfect for beginner gardeners. Height: 60cm (24"). Spread: 45cm (18").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 1 litre potted geranium plant

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 2 x 1 litre potted geranium plants

    • Despatch: By end of September 2016
    •  
    • £14.99

Meconopsis baileyi 'Hensol Violet'

Himalayan Blue Poppy, Tibetan Blue Poppy, Meconopsis betonicifolia

The 'must-have' Himalayan Blue Poppy' has a rival in this exquisite cultivated form. Bright violet-purple, almost shimmering flowers, with the merest hint of red, make a stunning addition planted in groups in shady borders and woodland areas. This 'collectors plant' still surprises countless poppy-lovers who have never seen this unusual perennial before. Meconopsis betonicifolia 'Hensol Violet' is so named for its origins from Hensol House, Scotland, where it was discovered by Lady Henderson. Height: 90cm (36"). Spread: 30cm (12"). More info
    • 1 x 9cm potted meconopsis plant

    • Despatch: By end of November 2016
    •  
    • £11.99
    • 2 x 9cm potted meconopsis plants

    • Despatch: By end of November 2016
    •  
    • £17.99

Lupin 'Russell Hybrids Mixed'

Lupinus

Tall spires of tightly packed flowers rise above clumps of palmate foliage in a magical array of colours. This wonderful mix of the ever popular 'Russell Hybrids' is ideal for adding height and structure to the back of perennial borders and woodland edges. A distinctive hardy perennial that remains a cottage garden favourite. Height: 90cm (36"). Spread: 50cm (20"). More info
    • 3 x 5cm potted lupin plants

    • Despatch: By end of September 2016
    •  
    • £9.99
    • 6 x 5cm potted lupin plants

    • Despatch: By end of September 2016
    • SAVE *£6.99  
    • £19.98 £12.99