Picea pungens Saint Mary's Broom - Blue spruce
Picea pungens Saint Mary's Broom - Blue spruce
Picea pungens Saint Mary's Broom
Blue Spruce, Colorado Blue Spruce, Colorado Spruce, Silver Spruce
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Available in 1 sizes
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Available in 2 sizes
Available in 2 sizes
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This plant carries a 24 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Description
Picea pungens 'Saint Mary's Broom' is a dwarf variety of blue spruce with a neat, globose habit. It develops steel-blue needles, quite long and widely inclined. Its very slow growth and compact size make it ideal for rock gardens, as well as beds, borders, or even containers where its blue-tinged foliage with silvery highlights remains beautiful all year round.
Native to the west coast of the United States and the Rocky Mountains of North America, up to Canada, Picea pungens, also known as Colorado Blue Spruce or Blue Spruce, is a very hardy evergreen conifer belonging to the Pinaceae family. In its natural environment, it grows slowly, displaying an elegant and very regular conical habit, with highly tiered horizontal branches. This tree can reach 25 to 40 metres in height, tolerates calcareous soils and some drought.
The 'Saint Mary's Broom' variety is derived from this species. It is a small evergreen conifer distinguished by its compact and beautifully rounded habit. Its growth is very slow, around 4 to 6 cm per year. After 10 years, it will reach 40 to 50 cm in height with a spread of 60 cm. It produces fairly long and thick shoots, tightly packed and well-inclined. They are covered with thick, very stiff needles, arranged in dense, radial brushes around the shoots. Its young spring shoots are a beautiful silver, then the foliage takes on a powdery blue-grey hue with silvery highlights.
The 'Saint Mary's Broom' Blue Spruce stands out for its beautifully rounded appearance and small size, requiring no maintenance. It is a lovely plant for rock gardens or small beds. Its ability to thrive in containers makes it perfect for decorating a terrace. This spruce pairs well with stone elements in the garden. It can be accompanied by dwarf conifers with very different appearances, such as Chamaecyparis obtusa 'Chirimen', which perfectly embodies the bonsai spirit. Conifers provide lasting structure to a space, define pathways, edge terraces, and make excellent alternatives to clipped boxwood. You can plant snow-in-summer (Cerastium) at their base.
Plant habit
Foliage
Botanical data
Picea
pungens
Saint Mary's Broom
Pinaceae
Blue Spruce, Colorado Blue Spruce, Colorado Spruce, Silver Spruce
Cultivar or hybrid
Planting and care
Plant Picea pungens Saint Mary's Broom from September to November and from February to June in a fairly fertile, well-drained, light, close to neutral, slightly calcareous, or slightly acidic soil, even occasionally dry in summer. A sandy, loamy, humus-bearing, or stony soil that is not too calcareous will be perfectly suitable. Choose a sunny spot (or at a pinch, partially shaded in a hot climate), sheltered from prevailing winds. In overly damp conditions, it will be more susceptible to root rot. Soak the root balls thoroughly before planting. Add organic matter at planting time and water generously for the first few years, and during prolonged droughts. Apply a special conifer fertiliser every year in April and hoe the soil in summer. This extremely hardy conifer dislikes heavy, waterlogged soils in winter. Pruning is not necessary, quite the opposite, as this plant reaches its full potential when allowed to grow freely.
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).
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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.