Achillea or yarrow - has lovely silvery green ferny leaves and large heads of tiny flowers which can be in pinks, reds, white or yellows. It is very easy to grow.
Agastache
Alchemilla mollis
Bergamot
Borage
Bugle
Catmint
Clary
Cornflowers
Delphiniums
Foxgloves
Gladiolus
Geraniums try 'Johnson's Blue'
Harebells have delicate nodding blue flowers
Hollyhock
Hostas
Hyssop
Irises - Bearded types.
Lavender
Lilies
Lupins
Mallows come in a lovely selection of pinks as well as white
Purple Mullein
Nasturtiums - very easy to grow
Pinks
Purple Toadflax
Roses
Salvias
Sweet Rocket
Sweet Williams
Thalictrum aquilegifolium
Valeriana officinalis
Verbascums
If you would like a comprehensive guide to perennials then I recommend the RHS Encyclopedia of Perennials - it would make an ideal birthday present for yourself or gardening relative. It has details of over 5,000 plants and is full of tips and cultivation notes.
An Encyclopedia of Perennials
Enjoy your June English Garden
