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PETASITES japonicus
Commonly known as Giant butterbur
Perennial rhizomatous plant which prefers damp conditions. Dense clusters of yellowish-white flowerheads in FEB-MAR followed by large kidney-shaped leaves growing up to 3 feet high on stalks
Further Reading....
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WhiteYellowish white
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Height1-1.2m (3-4ft)
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Spread3-5m (10-16ft)
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Bulb/Corm or rhizomatous perennialRhizomatous perennial with kidney-shaped, irregularly toothed basal leaves to 80cm (32in) across on stalks to 1m (39in) long. Produces dense clusters of flowerheads to 1.5cm (½in) across, with oblong bracts below, before the leaves
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HerbaceousEarly in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.
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Hardy - average winterHardy through most of the UK apart from inland valleys, at altitude and central/northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plant can withstand temperatures down to -10°C (14°F)
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Full shade
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Partial shade
PETASITES japonicus
- Details
- Mature Size
- Tips and Advice
- Goes Well With
- Planting Combinations
- Other Suggestions
- See Also...
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Additional FeaturesPests & DiseasesNonePlace of originChina, Korea, Japan.
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Garden Location/ConditionsBog garden
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HardinessFrost hardy (down to -5)
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Seasonal InterestSpring
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Soil ConditionsWet or boggy soilHumus-rich, permanently moist, not stagnant.
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WildlifeRabbit Resistant
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Herbaceous Plants - Video Collection
- Dividing Herbaceous Perennials - Video Tip ondemand_video
- Spring Planting Osteospermums - Video Tip ondemand_video
- Dividing Summer Perennials - Video Tip ondemand_video
- Dividing summer flowering Hemerocallis - Video Tip ondemand_video
- Summer propagation - Video Tip ondemand_video
- Self-seeding aquilegia - Video Tip ondemand_video
- Supporting Plants - Video Tip ondemand_video
- Dead heading meconopsis - Video Tip ondemand_video
- Dead heading Delphiniums - Video Tip ondemand_video
- Feeding herbaceous peonies - Video Tip ondemand_video
- Overpotting Problems - Video Tip ondemand_video
Petasites - Growing Guide
1-1.2m (3-4ft)
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3-5m (10-16ft) |
Useful extras...

Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00

Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00

Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50

Vermin & Pest Control
Slug Pellets
Slug killer blue mini pellets are easy to use and give effective control of slugs and snails.
Ideal in garden, conservatory or greenhouse.
Only £6.50