Hypericum kalmianum Gemo - St. John's wort
Hypericum kalmianum Gemo - St. John's wort
Hypericum kalmianum Gemo - St. John's wort
Hypericum kalmianum Gemo - St. John's wort
Hypericum kalmianum Gemo - St. John's wort
Hypericum kalmianum Gemo
Kalm's St. John's Wort, Kalm St. Johnswort
Reception in perfect condition of all the vine-plants. After planting, the growth of the young plants proceeds normally. Thank you.
christian, 19/04/2023
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Description
The Hypericum kalmianum 'Gemo', also known as Kalmian St. John's Wort, is a small-sized bush with a compact and bushy habit, featuring golden yellow flowers in contrast to original, blue-green foliage.
Originally from North America, the Gemo St. John's Wort is a horticultural breed obtained in Denmark. This small, fast-growing bush measures 80 cm (31.5 in) to 1 m (3 ft 4 in) in height and width. Its small golden yellow flowers, 2 cm (0.8 in) in diameter, are borne in cymes of 5 to 7 rather small but numerous flowers, which bloom from July to September. Its originality comes from its semi-evergreen, lanceolate foliage of 3 to 5 cm (1.2 to 2 in) in a magnificent blue-green that takes on beautiful autumnal colours. The foliage is carried on wood with a thin, smooth and amber bark, which peels off in fine strips.
Hardy up to -15°C, the Hypericum kalmianum Gemo can be planted in any exposure; it has no requirements on the nature of the soil. Unlike many other St. John's Worts, it is very resistant to rust.
Perfectly adapted to limited spaces, plant it on the edge of a bed or in a pot, paired with the blue of the Caryopteris and Perovskias.
Hypericum kalmianum Gemo - St. John's wort in pictures
Plant habit
Flowering
Foliage
Botanical data
Hypericum
kalmianum
Gemo
Clusiaceae
Kalm's St. John's Wort, Kalm St. Johnswort
Cultivar or hybrid
Planting and care
Hypericum kalmianum 'Gemo' can perhaps be placed along a wall, at the foot of a hedge, a tree, or a bush bed. You can also use it to border a path. For planting in open ground, if your soil is poorly drained and retains water, use compost and sand. No particular care is recommended except for pruning in March-April, at the end of winter and the start of vegetation growth. prune as much as possible 2/3 of the length of the branches.
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).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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 planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.