Agastache 'Blackadder'

hyssop

2 litre pot £7.99 Buy
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The ultimate midsummer bee plant with soft, stubby blue bottle brushes tinged with black- purple -the antidote to sunny orange calendulas

Val Bourne - Garden Writer

  • Position: full sun
  • Soil: well-drained, fertile soil
  • Rate of growth: average
  • Flowering period: July to October
  • Hardiness: hardy (borderline)

    Hyssops are great for adding height to a border, with whorls of long-lasting, tiny flowers arranged like a bottlebrush and pointed, aromatic fresh green leaves that are attractive to butterflies. They are short-lived though, and may need replacing every few years, especially after a cold or wet winter. 'Black Adder' has smoky, violet flowers on long spires from July to October. Try it as part of a Mediterranean scheme or in a sunny, well-drained border among ornamental grasses.

  • Garden care: Don't cut back the faded flower-stems until early spring, as they provide interest in the winter months. Lift and divide congested colonies in spring.

Molinia caerulea subsp. arundinacea 'Transparent'

purple moor grass

Tall and see-through

£9.99 Buy

Geranium × oxonianum 'Wargrave Pink'

cranesbill

Fast-growing and long-flowering

£8.99 Buy

Verbena bonariensis

purple top

Lilac-purple flowers

£7.99 Buy

Gaura lindheimeri 'Siskiyou Pink'

gaura

Long-lasting pink flowers. Copes wth drought

£8.99 Buy

Cosmos atrosanguineus Chocamocha ('Thomocha')

chocolate cosmos

Smells deliciously chocolatey

£7.99 Buy

Geranium (Cinereum Group) 'Ballerina'

cranesbill

A dwarf variety with pink, veined flowers

£7.99 Buy
 

Overwintering Tender Perennials

Tender perennials, such as pelargoniums, fuchsias, osteospermums and marguerites look great all summer, but unless they are given protection from the harsh winter weather, they will need to be replaced each spring. If you can do this, they will last for y

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