June is a lovely month in the garden, a time when spring and summer collide in a flurry of flowers. Many plants are at their most active, putting on lots of new growth while there are long hours of daylight and lots of moisture in the soil.
It’s hard to highlight a plant looking good during June as there are so many to choose from, but one that stands out is Geranium Rozanne. This plant is a perennial Geranium that comes up year after year and reaches around 80cm across and 60cm high. It is a strong growing, almost vigorous perennial and will form quite a large clump where its sprawling growth spreads, so it does need to be given plenty of space in the border, otherwise it may swamp smaller plants. Having said that, it is an easy plant to grow, preferring a well-drained, moisture retentive soil in an open sunny position and with its sprawling habit it doesn’t need staking during the summer.
Most of the perennial geraniums have characteristically lobed leaves and Rozanne is no exception to this rule as its leaves are split into five divisions with a lobe to either side, borne on thin, wiry stems. This geranium produces saucer-shaped, rich campanula-blue flowers about 2cm across – each flower has a white centre, and each petal has five radiating dark purple veins.
From May to October...
Although geranium Rozanne begins flowering in early summer it keeps on blooming until October and this is one reason why this selection is so popular - it was bred by Adrian Bloom and introduced by Blooms of Bressingham. With such a long flowering period it makes it a great-value plant to use in a mixed border where it will associate well among other early summer-flowering perennials.
At RHS Garden Hyde Hall it can be found growing in the Island Borders in the Hilltop Garden where it works well mixed with other summer perennials such as Salvia nemorosa ‘Lubecca’, with its dark purple flower heads or purple forms of the day lily such as Hemerocallis ‘Bela Lugosi’. It would also work well in more naturalistic settings with plants such as Knautia macedonica with its tall stems and maroon pin-cushion flowers or late spring flowering bulbs such as Allium ‘Globemaster’ whose large round purple flower heads look great emerging among the geraniums' foliage and flowers.
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