Thompson & Morgan

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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 62 products.
 

Centranthus 'Star Ruber Mixed'

Valerian, Red Valerian, Pretty Betsy

A beautiful border plant beloved by bees and butterflies. Mixture contains three colours: rose, white and maroon. Plants are lightly fragrant, long flowering and may also be used as a cut flower.
More info
    • 1 packet (100 seeds)

    • Despatch: Within 3 days
    •  
    • £2.89

Foxglove 'Silver Cub'

Digitalis purpurea subsp. heywoodii

  • NEW in 2014
This unusual foxglove produces silvery foliage coated in a layer of thick hair which feels soft to the touch like puppies' ears! Clear white blooms with delicate spotted centres decorate sturdy, mid-height flower stems on multi-branched plants from May to July. Flowering in its first year from a January sowing, grow Foxglove 'Silver Cub' in sunny or partially shaded borders where it will attract bees and other pollinating insects. Height: 60cm (24"). Spread: 45cm (18").
More info
    • 1 packet (100 seeds)

    • Despatch: Within 3 days
    •  
    • £0.99

Dianthus barbatus 'Kaleidoscope Mixed'

Sweet William

  • RHS Perfect for Pollinators
A cottage garden favourite with an unusual colour twist! This beautiful Sweet William produces large heads of pretty pink flowers that gradually mature to white, creating a delightful bicolour effect. Sweet William 'Kaleidoscope' is highly scented with multi branching stems that make it superb for cutting. Often grown as a biennial, this short lived perennial is ideal for borders, beds and containers, and will even flower in the same year if sown early. Height: 60cm (24”). Spread: 30cm (12”).

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

More info
    • 1 packet (40 seeds)

    • Despatch: Within 3 days
    •  
    • £1.29

Erigeron karvinskianus 'Profusion'

Erigeron karvinskianus, Fleabane, Mexican Fleabane

Lovely subject for hanging baskets, window boxes, patio tubs. Flowers within 3 months.
More info
    • 1 packet (200 seeds)

    • Despatch: Within 3 days
    •  
    • £3.29

Echinacea purpurea 'White Swan'

Coneflower

Strong honey fragranced flowers in 16 weeks, often with 14+ 10cm (4in) blooms out at once. Long lived for border, bedding or cutting. Height: 45-60cm (18-24in).
More info
    • 1 packet (50 seeds)

    • Despatch: Within 3 days
    •  
    • £2.99

Achillea ptarmica 'Double Diamond'

Yarrow, Sneezewort

 Customer Rating
Compact bushy plants are smothered with mainly double, dazzling white pom-pom flowers. An improved selection of this fabulous first-year-flowering hardy perennial, growing to 30cm (12”) in the first year and 80cm (32”) in the second. Achillea 'Double Diamond' is ideal for the front and middle of borders, as ground cover or as low hedging where it will attract bees and other beneficial insects. This elegant Yarrow also makes a lovely cut or dried flower. Height: 80cm (31”). Spread: 60cm (24”).
More info
    • 1 packet (80 seeds)

    • Despatch: Within 3 days
    •  
    • £1.49

Foxglove 'Alba'

Digitalis purpurea f. albiflora, Digitalis purpurea 'Alba'

Marvellous large pure white spikes, a rare and unusual colour. Magnificent in the border in sun or part shade and very useful as a cut flower. Flowers early summer.
More info
    • 1 packet (150 seeds)

    • Despatch: Within 3 days
    •  
    • £2.69

Verbascum x hybrida 'Snow Maiden'

Mullein, Celsia

 Customer Rating

A first class garden plant! Well branched, erect spikes covered in large 4cm (1½in) pure white flowers, over a long period. An incredibly beautiful plant for the back of borders, seldom requiring support.

More info
    • 1 packet (100 seeds)

    • Despatch: Within 3 days
    •  
    • £3.49

Anemone japonica (Mixed)

Japanese Anemone, Anemone x hybrida, Windflower

Elegant, late summer flowering perennials, producing their gorgeous, well shaped blooms mainly in rose to pink shades for many weeks and providing the perfect end to the summer. Happy in sun or light shade. Flowers late summer/autumn, Height: 60cm-1.2m (2-4-ft). More info
    • 1 packet (30 seeds)

    • Despatch: Within 3 days
    •  
    • £3.99

Geranium 'Horizon Pink Ice' F1 Hybrid

Pelargonium x hybrida, Zonal Geranium, Zonal Pelargonium

Striking pink geranium. These robust plants are very bushy and free-flowering, creating an eye-catching display in borders or containers. Sow from January to mid-March to produce flowering plants by early summer. 30-35cm (12-14in) More info
    • 1 packet (6 seeds)

    • Despatch: Within 3 days
    •  
    • £1.49

Centranthus ruber 'Snowcloud'

Valerian, Red Valerian, Pretty Betsy

Attractive pure white selection. Ideal for attracting beneficial insects into the garden. Very long flowering and can be used as a cut flower.
More info
    • 1 packet (70 seeds)

    • Despatch: Within 3 days
    •  
    • £1.49

Arum Lily

Zantedeschia aethiopica, Calla Lily

A soothing sight by the waterside, in moist borders or large containers. These robust plants produce glossy foliage shooting like arrows from the base, then from late spring to mid-summer, the beautiful, pure white Arum Lily blooms become a sparkling attraction. Hardy with dry mulch winter protection. More info
    • 1 packet (20 seeds)

    • Despatch: Within 3 days
    •  
    • £1.49