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close windowPlant list: Biennials

If you sow biennial seed, you’ll get leaves in year one, followed by flowers in year two. Many biennials are sold as two year old plants, ready to flower.

Digitalis, Foxglove
 Latin name:Digitalis
 Common name:Foxglove
 Type of plant:Biennial
 Hardiness:Hardy
 Flower colour:White, pink, purple and yellow
 Leaf colour:Mid-green
 Height and spread:25cm x 30cm (10in x 1ft)
 Description:
From a rosette of soft hairy oval leaves grows a tall flowering spike that bears tubular, downward pointing flowers, which are very popular with bees. Left alone, foxgloves self-seed very easily. Perfect for a shady spot.


Erysimum cheiri, Wallflower
 Latin name:Erysimum cheiri
 Common name:Wallflower
 Type of plant:Biennial
 Hardiness:Frost-hardy
 Flower colour:White, yellow, red, orange and purple
 Leaf colour:Mid-to deep green
 Height and spread:25cm to 30cm x 30cm to 40cm (10in to 1ft x 1ft to 15in)
 Description:
Actually an evergreen, bushy, perennial, wallflowers are grown as a biennial. The upright stems have short, lance-shaped leaves and heads of sweetly fragrant, velvety flowers.


Onopordum acanthium, Cotton thistle
 Latin name:Onopordum acanthium
 Common name:Cotton thistle
 Type of plant:Biennial
 Hardiness:Hardy
 Flower colour:Pink
 Leaf colour:Silver-grey
 Height and spread:180cm x 90cm (6ft x 3ft)
 Description:
Tall thistle-like plant with prickly leaves. Will grow in sun or partial shade. To prevent self-seeding remove dead flowers, and protect leaves against slug and snail damage.


Dianthus barbatus, Sweet Wiliam
 Latin name:Dianthus barbatus
 Common name:Sweet Wiliam
 Type of plant:Biennial
 Hardiness:Hardy
 Flower colour:Pink, white and red
 Leaf colour:Mid-green
 Height and spread:30cm to 45cm x 20cm (1ft to 18in x 8in)
 Description:
Traditional cottage garden plant which produces beautifully scented heads of flowers. Requires spot in full sun, and prefers a slightly alkaline, well-drained soil.


Lunaria annua, Honesty
 Latin name:Lunaria annua
 Common name:Honesty
 Type of plant:Biennial
 Hardiness:Very hardy
 Flower colour:Deep purple to white
 Leaf colour:Mid-green
 Height and spread:75 cm x 30 cm
 Description:
An erect fast growing biennial with attractive, oval, serrated leaves. The flowers appear on short stems and are followed by silvery coloured seed pods. Prefers a spot in partial shade.



Related plant lists:


Hardy annuals
Half-hardy annuals
Biennials
Hardy perennials

Half-hardy perennials
Deciduous plants
Evergreen plants
Trees

Shrubs
Bulbs
Climbers