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 6 products.
 
Commelina Dianthifolia

Commelina dianthifolia

Bird-bill Day Flower, Widow's Tears

  Customer Rating

A very rare plant indeed. This is one of the few plants with such intense blue flowers and that will also perform well in the garden. Flowering in its first year with 2.5cm (1in) gentian blue flowers, it then produces tubers and springs back to life the following year with an unceasing display of blooms. Wonderful in containers, rock gardens and the border (regardless of soil conditions). Hardy down to -8/-10C. Flowers summer. Height 15-30cm (6-12in.)

 More info
    • 1 packet (25 seeds)

    • Despatch: Within 2 Days
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    • £1.49
Geranium Wallichianum Buxtons Blue

Geranium wallichianum 'Buxton's Blue'

Geranium wallichianum 'Buxton's Variety', Hardy Geranium, Cranesbill
This is definitely the star of the perennial geranium family producing flowers virtually non-stop from mid summer to early autumn. The flowers themselves are a delight, a gorgeous clear opal, or Nemophila blue with large white centres, against which the dark stamens and dark veining of the petals contrast beautifully. The plant forms an attractive clump with attractive wedge shaped, silky, deeply toothed leaves, making this a very garden worthy plant even when not in flower. It comes quite true from seed and has been given an Award of Garden Merit by the Royal Horticultural Society. Requirements: One of the easiest perennials to cultivate, happy in sun or light shade and any free draining garden soil. More info
    • 1 packet (8 seeds)

    • Despatch:
    •  
    • £1.49
    • Out of stock
Eryngium Planum Blue Hobbit

Eryngium planum 'Blue Hobbit'

Sea Holly, Blue Eryngo
The world's first naturally dwarf variety! Compact plants produce neat, basal rosettes from which emerge decorative, silver-blue stems that form into large, globular flower heads containing hundreds of small blue flowers. Ideal for adding interest to the front of borders or to containers. Seeds sown from November to January require no pre-chilling and will usually flower in their 1st year. More info
    • 1 packet (15 seeds)

    • Despatch: Within 2 Days
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    • £1.49
Polemonium Boreale Heavenly Habit

Polemonium boreale 'Heavenly Habit'

Jacob's Ladder

Attractive clusters of violet-blue flowers, each with a distinct golden yellow eye, look divine against the bushy, deep green foliage. Their dwarf habit makes them idea! in the front of borders, or even containers. If deadheads are removed regularly, plants will continue to flower throughout the summer.

 More info
    • 1 packet (20 seeds)

    • Despatch: Within 2 Days
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    • £0.69
Campanula Rotundifolia

Campanula rotundifolia

Harebell, Scottish Bluebell, Bellflower

 The pretty British Harebell otherwise known as the bluebell of Scotland, produces thin wiry stems of nodding pale blue flowers. An easy, charming plant for rockery, border etc. More info
    • 1 packet (1000 seeds)

    • Despatch: Within 2 Days
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    • £2.99
Primula Capitata Noverna Deep Blue

Primula capitata 'Noverna Deep Blue'

Asiatic Primrose
First year flowering. Attractive deep blue flower heads, held aloft by intriguing powdery white stems, above contrasting grey-green foliage. Adds an eye-catching display to borders and containers from summer into autumn. Height: 25-30cm (10-12in). More info
    • 1 packet (25 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.99