Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Geranium Brookside
Cranesbill, Storksbill, Hardy Geranium
3 geraniums bought in pots. They developed quickly, and I was able to divide the clumps a year and a half after planting! Beautiful violet colour shading towards blue, and flowering for a long time! The perfect little flower – pretty, hardy, and not fussy.
Gigi, 18/03/2026
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Description
The 'Brookside' geranium is a vigorous and hardy perennial. Johnson's Blue was thought to be perfect, but here comes a newcomer that could steal the show. More floriferous, its pretty light blue flowers with white centres are also larger and its habit is taller but just as dense. This hybrid blooms abundantly from late spring, all summer, and until September, with a break in August. The foliage forms a spreading clump, making for perfect ground cover that turns beautiful warm hues in autumn. Robust and easy to grow, it will be much appreciated in borders and beds, or in pots, always in the sun.
The 'Brookside' perennial geranium belongs to the Geraniaceae family. It is a hybrid resulting from cross-breeding between the meadow cranesbill (G.pratensis) and the highly floriferous G. clarkei 'Kashmir Purple'. It forms, in early spring, a rounded, spreading bush, 40 cm (16in) tall with a diameter of 60 cm (24in). The flowering, intense and generous, starts at the end of May and lasts until September if the weather is not too dry. If the summer is hot and dry, it will pause in August and resume in September. The flowers are countless, rather wide cups of intense blue, slightly veined with violet, with a small white centre. The foliage is deciduous, medium green, deeply cut on red stems. The foliage turns bright orange and red in autumn.
The 'Brookside' geranium can be used as a border plant in beds, but also at the base of modern roses to which it will add summer interest (especially pastel-coloured roses) by filling in around their base. It is suitable for natural gardens, woodlands or rockeries, as well as seaside gardens. It can be planted on slopes, but not excessively dry ones, or it can border a bed of easy-to-grow perennials such as Nepeta 'Six Hill Giant', heucheras, and Phlox paniculata. On the terrace, it grows very well in pots.
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Geranium Brookside in pictures
Flowering
Foliage
Plant habit
Botanical data
Geranium
Brookside
Geraniaceae
Cranesbill, Storksbill, Hardy Geranium
Cultivar or hybrid
Planting and care
The perennial geranium 'Brookside' prefers a sunny site, but it tolerates partial shade. Install it in fertile, well-drained soil that remains moist, even if it is chalky, acidic, or clayey. To plant this perennial, work the soil to a depth of 20 cm (8in) by crumbling the earth well and placing a base amendment in the planting hole, such as dried blood or dehydrated horn. Position your plant, freed from its pot, by covering the top of the root ball with 3 cm (1in) of soil, then fill in and water generously to eliminate air pockets. During dry weather, regular watering is necessary for a few weeks to facilitate root development.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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