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Boykinia major

Boykinia major
Large boykinia

5,0/5
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naked: worse than the chiastophyllum or the origanum; there, I don't believe it at all but I hope I'm wrong!

NATHALIE E., 25/09/2017

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This plant carries a 12 months recovery warranty

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Value-for-money
A rhizomatous perennial plant with large, toothed leaves.  The flowers are made up of numerous small white flowers with yellow centres, on long thin stems.  It is a graceful plant, which although not very spectacular, is very useful for brightening up a shady area of planting.
Flower size
15 cm
Height at maturity
70 cm
Spread at maturity
30 cm
Exposure
Partial shade, Shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Best planting time March to April
Recommended planting time February to April, September to November
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Flowering time July
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Description

Boykinia major is a large rhizomatous perennial plant.   The flowers are made up of numerous small white flowers with yellow centres, on long thin stems.  Resembling saxifrage, it is a graceful plant, which although not very spectacular, is very useful for brightening up a shady area of planting.

Boykinia major belongs to the Saxifragaceae family.  It originates from North America, specifically the western United States from California to Montana, and is a vigorous plant.  It grows in mountain meadows and shady forests and sometimes reaches a height of 80 cm (32in) when conditions are favourable.  Flowers are carried by on slender stems. The loose panicles in corymbs, measuring 8 to 10 cm (3 to 4in) long, are composed of numerous small white flowers with yellow centres, each shaped like elongated bells. The deciduous leaves are dark green, measure 10 to 20 cm (4 to 8in) long, sometimes more, have 5 to 7 roughly lobed segments, and are carried on long petioles. This plant slowly spreads by an underground rhizome and can live for a very long time in the right position.

 

The Large Boykinia likes humus-rich soils without too much limestone, that is always moist. It is quite hardy, to -15°C (5°F).

Boykinia major is suited to slightly wild areas and damp understorey planting in the garden e.g. among hostas, ferns, and Thalictrum. It will thrive on the banks of steams, ponds, and lakes, where it is frequently found in the wild.

Boykinia major in pictures

Boykinia major (Flowering) Flowering
Boykinia major (Foliage) Foliage
Boykinia major (Plant habit) Plant habit

Flowering

Flower colour white
Flowering time July
Inflorescence Panicle
Flower size 15 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 70 cm
Spread at maturity 30 cm
Growth rate normal

Botanical data

Genus

Boykinia

Species

major

Family

Saxifragaceae

Other common names

Large boykinia

Origin

North America

Planting and care

Great Boykinia enjoys a slightly heavy soil, rich in humus, with not too much limestone, that is always moist. Plant it in a partially shaded position. It is hardy to -15°C (5°F).

Planting period

Best planting time March to April
Recommended planting time February to April, September to November

Intended location

Suitable for Shaded rockery, Woodland edge, Undergrowth
Type of use Border
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Partial shade, Shade
Soil pH Acidic, Neutral
Soil type Clayey (heavy), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Rich in humus

Care

Pruning No pruning necessary
Disease resistance Very good
Overwinter Can be left in the ground
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