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XANTHORHIZA simplicissima
Commonly known as Yellowroot
Suckering, clump-forming plant with tiny purple flowers and purplish-bronze foliage in autumn
Further Reading....
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DeciduousLeaves to 30cm (12in) long each with 3-5 deeply lobed, irregularly toothed leaflets
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PurpleShades of purple/mauve/lilac/violet
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Height60cm (24in)
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Spread1.5m (5ft)
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Dwarf shrubTypically only grows to a maximum of one or two feet in height but there will be some exceptions.Thicket-forming shrub with erect shoots and leaves clustered at the shoot tips. Produces flowers in racemes or panicles to 10cm (4in) long
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Ground coverThese plants are typically low growing and spread quickly to inhibit weed growth on areas of bare soil
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Hardy - very cold winterHardy in all of UK and northern Europe. Plant can possibly withstand temperatures down to -20°C (-4°F)
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Full shade
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Partial shade
XANTHORHIZA simplicissima
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Additional FeaturesGood to knowExcellent ground cover for shadePests & DiseasesNonePlace of originEastern USA (Pennsylvania to Florida)
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Garden Location/ConditionsBorderSuitable for a damp, shady border
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HardinessFully hardy
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Leaf formPinnate
(see photos above) -
Leaf marginLobed
(see photos above) -
Leaf shapeOvate
(see photos above) -
Pruning groupPruning group 1Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.
Pruning group 2Suitable for: Deciduous shrubs and trees that flower in Spring or early Summer on previous year's growth, including plants that produce new growth at or near ground level.
Pruning: Prune flowered shoots to strong buds. Cut back approximately 1/4 of old shoots to the base to promote replacement growth.
When: Annually, after flowering.
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Seasonal InterestAutumnSpring
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Soil ConditionsFertile moist well-drained soilModerately fertile. Moist but not waterlogged
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Xanthorhiza - Growing Guide
60cm (24in)
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1.5m (5ft) |
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
Afterplant - Grow Your Own
AFTER PLANT GROW YOUR OWN seaweed is ready to use liquid concentrate that was specially formulated be used on all edible plants.
Only £8.00
Fertilisers & Feeds - Empathy
Afterplant - Tomatoes
AFTER PLANT TOMATO FEED Liquid Concentrate with Bio stimulant is a high potash liquid concentrate containing seaweed extract, plant derived amino acids and other nutrients specifically formulated to benefit tomatoes and greenhouse plants.
Only £8.00
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)
3 options from £3.00
Fertilisers & Feeds - Empathy
Rootgrow Ericoid mycorrhizal fungi
This specially adapted Rootgrow™ mycorrhizal fungi will boost the growth of acid-loving plants like rhododendrons, azaleas, heathers and blueberries.
It contains ericoid and arbuscular mycorrhizal fungi, which are found in poor acidic soils where ericaceous plants naturally grow.
Only £7.50
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