12th September 2016
When the bulk of a garden’s summer show comes from annuals that die in the first frosts of winter, reliable perennial flowering plants are the best props. These perennials will die down visually but stay alive under the earth, ready to reawaken come the spring and give a better show as each year passes.
One such perennial plant that I'm filling the garden at the factory with is Crocosmia. Crocosmia is also known to many as montbretia. These are cormous perennials, native to the grasslands of southern and eastern Africa. Despite their savannah heritage, they are hardy plants that can cope with the winter cold, and are tolerant of many soil types and being planted in dry places.
The corms are hard bulbous lumps – when you buy one in flower and tip it out of its pot, you'll see the roots coming from these corms. In the spring, many varieties can be bought more cheaply from garden centres as dormant corms. These can then be potted up in the greenhouse in plastic pots and planted out in their permanent spots once they are growing well in late spring.
Below are two of my favourite varieties. Other Crocosmia can be a little thuggish and rampant but if you have a garden that needs ground cover, orange flowering varieties such as ‘Carmin Brilliant’ are very helpful and will normally spread happily all over the garden.
Crocosmia ‘George Davidson’ - I first saw this new variety at the Great Dixter plant fair last year and liked it immediately. It gets to about 40cm tall and will spread well. It’s a beautiful, organic egg-yolk-yellow that I’ve combined in the garden with the equally golden yellow, perennial flowering rudbeckia, ‘Goldstrum’, and my favourite gladioli which is the sultry, cherry-liqueur-flowering ‘Plum Tart’. The flower buds start off as a golden orange opening to the yellow, so buy it in full flower to ensure you’re getting the right variety.
Crocosmia ‘Lucifer’ – I love to see this in flower at Paradise Park, a bird garden in Cornwall, St Ives, where great clumps of it grow in the flower beds as supporting acts to a flock of orange- and pink-plumed Caribbean flamingos. This is the tallest and most dramatic of the Crocosmia, sending up its flaming red, funnel shaped flowers from lush green, sword-like foliage.
It looks best when allowed to form a large, statuesque clump in the garden. In windy places, the whole clump is best staked with fan-shaped branches of silver birch or hazel, that are pushed into the clump’s heart in the spring before the leaves get too tall. Combine it with lime green euphorbias and purple smoke bush for a reliable year-on-year hardy display, or for a more intense summer show, plant tender dahlias, gladioli and annual sunflowers around a clump of it. It also makes a very good cut flower filler to a summer arrangement, and lasts well out of the water – making a good buttonhole choice for an exotic summer wedding!
In Sarah Raven’s garden at Perch Hill it has been combined with the hard flowering, scented perennial phlox ‘Blue Paradise’, which is another of my favourite perennial plants.
Thanks for reading – Arthur
12th September 2016