Tiarella wherryi
Tiarella wherryi
Tiarella wherryi
Tiarella wherryi
Tiarella wherryi
Wherry's foam flower
These plants quickly acclimated, they bloomed well.
Laurence R., 16/06/2018
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Description
Tiarella wherryi is a beautiful shade-loving perennial. It forms a clump of about 20 cm (8in) tall and a little wider. Its lovely flowering, in pink feathery spikes that turn white, is remarkably long-lasting as it extends from mid-spring to the middle of summer. Its soft green leaves are very decorative and resemble those of the maple tree.
Tiarella wherryi, also known as Wherry's foam flower, belongs to the saxifrage family. It is named after Edgar Theodore Wherry, an American mineralogist, geologist, and botanist. Tiarelles, native to North American woodlands, are cousins of heucheras with which they readily hybridise.
This Tiarella forms an erect clump, not exceeding 30 cm (12in) in height and 40 cm (16in) in width at maturity. In May, individual flowers appear, lightly scented, star-shaped. They are densely arranged in delicate spikes on stems about 30 cm (12in) tall, and offer a beautiful range of very pale raspberry pink to white, depending on their fading over time. Its semi-evergreen foliage is tender green veined with purple-brown at the base. Its feathery, palmate, and lobed leaves measure about 10 cm (4in) in length. In autumn and winter, they take on sublime purple-bronze hues. These hues become even more pronounced when temperatures drop during winter.
In the wild, Tiarella are typically found in wooded or alpine environments, in damp and humus-rich soil, under cool climates. Therefore, they are well-suited for planting in damp understorey planting or cool rockeries. They thrive in the company of ferns, Hostas, Solomon's seals, astilbes. They can also be used as waterside plants, to accompany Rodgersia or orange Carex testacea in winter. They will also thrive in shady containers or planters. In this case, they should be planted in a well-drained potting mix without excessive fertiliser, with summer watering being monitored and reduced in winter. Potted plants will need protection against cold winter winds.
Flower buds are formed during summer, but they will only develop and bloom after being exposed to at least 10 weeks of cold temperatures the following year. Cold is therefore necessary for the ripening of this perennial.
Tiarella wherryi in pictures
Flowering
Foliage
Plant habit
Botanical data
Tiarella
wherryi
Saxifragaceae
Wherry's foam flower
Cultivar or hybrid
Planting and care
To plant your Tiarella, work the soil to a depth and width of 20 cm (8in), crumble the soil well and add bonemeal into the planting hole. Position your young plant, removed from its pot, by covering the top of the root ball with 3 cm (1in) of soil, fill in and water thoroughly to eliminate air pockets. Tiarellas are easily planted in any good moist soil. They tolerate clay soils, although they prefer slightly lighter humus-rich soils. Remember to water in the summer, especially during the first season, as soon as the soil dries out.
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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