Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon - Armenian Cranesbill
Geranium psilostemon
Armenian Cranesbill, Hardy Geranium
It seems that Geranium psilostemon is also considered a reliable choice, honestly, and unlike the dazzling 'Patricia', it doesn't immediately catch the eye. Today it sports two leaves, one of which is rather unsightly. It's also said to have slow growth, and I can confirm that—Psilostemon is not a vigorous grower at all. But I also know that some hardy geraniums can be very sluggish to get started. I also grow 'Hocus Pocus', which I thought was dying about ten times in its first year, and I had to move it twice before it finally gained confidence and began to develop. Today, it has found love alongside Knautia macedonica, which has also been enhanced by the pairing. This category of slow-growing geraniums should initially be cultivated in pots—we often start there. In open ground, by the time it develops two leaves, it will likely perish under couch grass or clover. So, a pot is best. At least a year, then into the ground, with a small marker to find the little darling again next spring. I can't say more today, given its rather anaemic appearance. But patience is key! It seems that once it gets going, according to this description and some comments, it turns into something of a powerhouse. So, I'm waiting. I'm deducting two stars, even though this might be an anticipated injustice.
Philippe 87, 16/06/2025
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Description
Geranium psilostemon, also known as Armenian Cranesbill, or formerly Geranium armenum, is a lush perennial. Over time, it forms a majestic and dense dome of dark green palmate leaves, which is covered from late spring to mid-summer with an abundant flowering of magenta-pink flowers with black centres. Very hardy, it requires full sun and fertile, moist soil to thrive, allowing it to reach impressive dimensions. A true star and strong personality, suitable for all borders. Before bidding farewell, it adorns itself with beautiful autumnal hues.
Geranium psilostemon belongs to the Geraniaceae family. It is native to Armenia and the Caucasus. This perennial displays a regular and bushy dome-shaped growth from spring onwards. It will reach a height of 60 to 120 cm (24 to 47 in) when flowering, depending on the growing conditions, with a minimum diameter of 60 cm (24 in). Its growth is slow. Flowering begins in late May to early June and continues in July to August. The inflorescence is a compound cyme of round and open flowers, magenta-pink veined with black, along with a black centre. The flowers have a translucent texture reminiscent of crepe paper, measuring 4 cm (2 in) in diameter. The fruits that follow the flowers are long and slender, opening to project the seeds far away. This geranium has dark green foliage, composed of seven lobed, hairy, slightly aromatic leaves, tinged with purple in spring and turning red in autumn. It overwinters in the form of underground roots.
Geranium psilostemon is a wonderful plant for borders and cool slopes in cottage gardens. Pair it with verbascum, paniculate baby's breath, Crambe cordifolia, bronze fennel, goldenrod, purple knapweed, Aster laevis, all tall perennials that will not overshadow its somewhat theatrical charm. It also grows well in large pots, with the appropriate fertiliser and watering.
Geranium psilostemon - Armenian Cranesbill in pictures
Flowering
Foliage
Plant habit
Botanical data
Geranium
psilostemon
Geraniaceae
Armenian Cranesbill, Hardy Geranium
Central Europe
Planting and care
Plant Geranium psilostemon in autumn or spring in a neutral to limestone, fertile, loose, well-worked, humus-bearing, and occasionally dry soil. In poor soil, add organic fertiliser and compost at the start of vegetation. It will reach a height of 120 cm (47 in) in rich, well-drained soil that remains fresh. This geranium enjoys full sun, but it tolerates partial shade. When planting in borders, leave at least 80 cm (32 in) between plants. Divide clumps every five years to ensure they remain floriferous. After visiting many gardens, we have noticed that this geranium seems to particularly appreciate humid and relatively cool regions in summer, with a similarly cool and rich, even clayey, soil. We do not recommend growing it in areas with hot summers, where varieties like 'Ann Folkard' or 'Anne Thomson' seem more suitable. In the mixed border of our garden, it always attracts a lot of attention.
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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