Thompson & Morgan

Important delivery notice
The products on this site are only delivered to UK addresses. If you require delivery to another country please visit one of our other sites below.

Refine Results

Refine by..

Email Newsletter

Sign up to our newsletter

Perennial & Biennial Seeds


Biennials live for 2 years, whereas perennials live for longer. As a general rule, biennial and perennial seeds should be sown in spring, but some can be sown in autumn as well. Many varieties will self-seed after flowering, giving you even more plants!



We have found 29 products.
 

Perennial Flower Border Seed Collection

A well planned flower border is a magnificent sight in summer! This colourful mix of annuals and perennials will brighten up any garden. To help you make the most of your borders, we have grouped together varieties by height to help you achieve a balanced display. Height: Up to 150cm (59"). Spread: Up to 60cm (24").

Collection comprises:

  • Tall Flowers
  • Lupin 'Tutti Frutti' (40 seeds) - A mouth-watering range of attractive bicoloured flower spikes.
  • Delphinium 'Tall Black Knight' (100 seeds) - Tall, robust, candle-like flower spikes packing with attractive, deep blue blooms.
  • Foxglove 'Excelsior Hybrid Mixed' (2500 seeds) - Superb for shady shrub and tree areas, backs of borders and excellent for cut flowers.
  • Melianthus 'Major' (10 seeds) - Blue-green spiky foliage, which has a sweet peanut butter fragrance when crushed.
  • Verbena bonariensis (200 seeds) - This elegant perennial is at its most effective when planted in large swathes.
  • Mid-height Flowers
  • Astrantia 'Ruby Cloud' (22 seeds) - Large flowers of ruby, tinged in apple green.
  • Echinacea 'Magic Box' (30 seeds) - A stunning colour range and superior garden performance.
  • Penstemon 'Wedding Bells' (50 seeds) - Satin, bell-shaped flowers are carried above glossy, semi-evergreen foliage.
  • Lysimachia atropurpurea (40 seeds) - Many spikes of claret-red, almost black florets - a highly unusual colour in perennials.
  • Silene 'Jack Flash' (15 seeds) - Attractive bright red, starburst blooms borne on slender stems.
  • Short Flowers
  • Gaillardia 'Arizona Sun' (20 seeds) - This low maintenance, hardy perennial is trouble-free and even copes well on poor, dry soils.
  • Veronica 'Mixed Colours' (50 seeds) - Many erect spikes, full of tiny flowers.
  • Nepeta 'Blue Moon' (30 seeds) - A neat, dwarf, bushy, habit, with large dense blue flower spikes.
  • Pinks 'Sweetness Mixed' (50 seeds) - Dwarf, bushy, spreading plants; ideal for cottage or perennial borders.
  • Viola 'Rose Shades' (30 seeds) - A delightful bushy, compact and free flowering variety.
More info
    • 15 varieties - 1 packet of each (3187 seeds in total)

    • Despatch: Within 1 days
    • SAVE £22.76  
    • £47.75 £24.99

Delphinium x cultorum 'Tall Black Knight'

Tall, robust, candle-like flower spikes packing with attractive, deep blue blooms, each complemented by a striking large black bee in the centre. A stunning addition to any border. Height: 120-150cm (4-5ft).
More info
    • 1 packet (100 seeds)

    • Despatch: Within 1 days
    •  
    • £2.99

Hollyhock 'Halo Mixed'

Alcea rosea, Althaea rosea

 Customer Rating
Colour that's almost 2 metres high! And now Hollyhocks are even more colourful thanks to new Hollyhock 'Halo Mixed', with its glowing eyes to add contrast. These stunning cottage garden perennials make a beautiful cut flower for a vase indoors and the edible flowers can even be added to salads for an attractive, tasty treat. Recognised by the European Fleuroselect panel of experts with a novelty award too. Height: 180cm (71”). Spread: 60cm (24”).

Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

More info
    • 1 packet (25 seeds)

    • Despatch: Within 1 days
    •  
    • £0.99

Delphinium hybridum 'New Zealand Doubles Mixed'

Layer upon layer of soft petals make up the tight double blooms on this indulgent new mixture, a sister breeding line to the ever popular New Zealand Hybrids. Dreamy spires in calming shades of pale mauves, bold blues, pinks, cool whites and creams create an awesome presence in perennial borders, with the added benefits of flowering longer, stronger growing and mildew resistance than other Delphiniums. Height: 120-150cm (4-5ft).
More info
    • 1 packet (10 seeds)

    • Despatch: Within 1 days
    •  
    • £5.49

Hollyhock 'Nigra'

Alcea rosea, Althaea rosea

 Customer Rating
Tall strong stems bearing chocolate maroon flowers, becoming almost 'black' towards the centre. This is a unique variety creating an impressive impact against most backgrounds. Flowers mid to late summer. Height 5ft.

Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

More info
    • 1 packet (50 seeds)

    • Despatch: Within 1 days
    •  
    • £0.99

Lisianthius nigrescens

Flower of Death

This rare exotic plant is little known outside its native homeland of Mexico. A choice species, and seldom offered, Lisianthius nigrescens bears long, tubular flowers of the darkest black, on slender, towering stems. This extraordinary perennial makes a dramatic specimen plant and a fascinating talking point that will create interest and wonder at the back of borders. Lisianthius nigrescens is half-hardy but will require winter protection in a frost free environment during the winter months. Height: 180cm (71"). Spread: 50cm (20"). More info
    • 1 packet (20 seeds)

    • Despatch: Within 1 days
    •  
    • £3.29

Delphinium hybridum 'Green Twist'

This gorgeous Delphinium was bred in New Zealand, and has taken many years of selection to ensure it grows true from seed. Strong plants produce tall, stately spires of flowers in an unusual blend of creamy-white with green streaks and shadows on the petals and a cream/green central bee or occasionally no bee at all. Makes a very attractive and unusual addition to perennial borders. Height: 120-150cm (4-5ft)
More info
    • 1 packet (8 seeds)

    • Despatch: Within 1 days
    •  
    • £5.49

Canna indica 'T&M Hybrids'

Indian Shot Plant

 Customer Rating
Shades of yellow, red and cream with pretty bronze or green foliage. Sow early.
More info
    • 1 packet (15 seeds)

    • Despatch: Within 1 days
    •  
    • £0.99

Hollyhock 'Antwerp Mixed'

Alcea ficifolia

A rich cottage garden mixture of colourful pastel shades. The Antwerp blend has attractive and unusual palmate foliage, and is also shown to have the best levels of resistance to the common Hollyhock problem of rust. Excellent for borders, especially planted in groups. Height: 150-180cm (5-6ft).

Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

More info
    • 1 packet (50 seeds)

    • Despatch: Within 1 days
    •  
    • £2.99

Cobaea (Duo)

Cup And Saucer Vine, Cathedral Bells, Cups And Saucers, Mexican Ivy

 Customer Rating

One packet each of Cobaea scandens and Cobaea scandens alba.
Cobaea scandens - A showy climber for the cool greenhouse, conservatory, and also forming a very decorative screen on trellis or south facing wall in milder areas. The large bell shaped 'cup and saucer' flowers are often 6cm (2½ in) across. Flowers late summer. Climber.
Cobaea scandens alba - A spectacular climbing plant for the summer garden or the conservatory. This very choice creamy white form of Cathedral Bells or The Cup and Saucer Plant comes from Mexico and quickly grows to cover unsightly areas or a wall outdoors, where it can be treated as a summer annual. Alternatively it may be grown in the heated conservatory or greenhouse, where it will continue to flower for many years. Flowers summer. Climbing Height 3-6 metres (10-20ft).

More info
    • 2 packets - 1 of each variety (13 seeds in total)

    • Despatch:
    • SAVE £1.49  
    • £5.98 £4.49
    • Out of stock

Delphinium hybridum 'Pacific Giants Mixed'

A justifiably famous and reliable strain that will flower in the summer from an early sowing producing strong spikes of mainly semi-double blooms in a wide colour range on sturdy stems. Flowers early summer. Height 4-5 feet.
More info
    • 1 packet (110 seeds)

    • Despatch: Within 1 days
    •  
    • £2.99

Chrysanthemum x koreanum 'Fanfare Improved' F1 Hybrid

Chrysanthemum x grandiflorum, Florist's Chrysanthemum

The cooler it is the earlier it blooms continuing till hard frost. Double pom-pom, 3in flowers on semi-dwarf plants. Magnificent cut flower.


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


Useful links:

Companion Planting

More info
    • 1 packet (40 seeds)

    • Despatch: Within 1 days
    •  
    • £0.99