Bowman's root

Sun

Partial shade or sun; give afternoon shade in hot climates.

Water

Moderate; keep evenly moist while establishing, then water during prolonged dry spells.

Soil

Humus-rich, well-drained soil, preferably acidic to neutral; tolerates some clay if drainage is good.

Height

2-3 ft (0.6-0.9 m)

Spread

1.5-3 ft (0.45-0.9 m)

Flowers

Late spring to early summer; white flowers with narrow, uneven petals and reddish calyces.

Foliage

Deciduous leaves divided into three pointed, toothed leaflets; green in summer, often orange or red in autumn.

Growth

Moderate once established; young plants may take two or three years to form substantial clumps.

Care needed

Low

• Pollinators
• Deer resistant
• Cold hardy
• Low allergen

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   1.5 ft (0.45 m)

3. After 2 years

   2 ft (0.6 m)

4. After 3 years

   2.5 ft (0.75 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Mildly toxic: may upset a stomach

Native to

the US and Canada

Growth rate

Moderate

• Water deeply during the first growing season, especially in dry weather.
• Apply a thin layer of leaf mould or compost in spring; rich feeding is usually unnecessary.
• Mulch to conserve moisture, keeping mulch away from the crown.
• Choose a sheltered position; support stems early if they lean in deep shade or rich soil.
• Leave established clumps undisturbed unless division is needed.

Pruning. Cut dead stems to ground level in late winter or early spring before new growth appears. Deadheading is optional and is not needed to maintain the plant.

Late winter

Cut down old stems before fresh shoots emerge.

Spring

Plant or divide as growth begins, watering thoroughly afterwards.

Mid-spring

Apply leaf mould or compost and check young shoots for slug damage.

Early summer

Add discreet support if stems begin to lean; avoid heavy feeding.

Summer

Water during prolonged dry spells, particularly in sunny positions.

Autumn

Enjoy the leaf colour and leave stems standing where winter structure is welcome.

• Plant in small groups along a woodland edge, where white flowers stand out against dark foliage.
• Thread through a mixed border to soften heavier flowers and broad leaves.
• Combine with ferns and hostas for contrasting leaf shapes in partial shade.
• Use in eastern North American native plantings with sedges and other woodland perennials.

Garden styles it suits: Woodland, Cottage garden, New perennial (prairie), Wildlife garden, White garden and Autumn colour.

Plant it with: Hostas, Lady fern, Solomon's seal, Foamflower, Woodland phlox and Pennsylvania sedge.

Wildlife: Flowers attract bees and other pollinating insects. Deer usually leave it alone, although browsing is still possible.

• Flopping stems in deep shade or overly rich soil: provide brighter light, avoid high-nitrogen fertiliser and add discreet support.
• Wilting or scorched foliage during drought: water deeply and mulch; provide afternoon shade in hot gardens.
• Crown or root rot in waterlogged soil: improve drainage or move the plant to a better-drained position.
• Slugs eating emerging shoots: check plants in spring, remove slugs by hand and use locally approved controls if damage persists.

The roots contain compounds that can cause vomiting and should not be eaten or used as a home remedy. Reliable species-specific toxicity information for cats, dogs and horses is limited; do not assume it is safe for pets or livestock, and seek medical or veterinary advice after ingestion.

• American ipecac (Gillenia stipulata)

  This close relative has conspicuous, toothed, leaf-like stipules at the leaf bases; Bowman's root has much smaller, narrow stipules.

• Goat's beard (Aruncus dioicus)

  Goat's beard is generally larger, with dense, feathery flower plumes and leaves divided into many leaflets; Bowman's root has loose, five-petalled flowers and three leaflets per leaf.

The species name trifoliata means three-leaved, referring to the three leaflets that make up each leaf.

Propagation. Divide carefully in early spring, retaining substantial roots on each piece; established woody crowns can be difficult to split. Sow fresh seed outdoors in autumn, allowing winter cold to help break dormancy; germination can be slow and uneven.

Accepted botanical name

Gillenia trifoliata

In the US and Canada

Native in Canada and the lower 48 states.

Native range

Alabama, Arkansas, Delaware, District of Columbia, Georgia, Illinois, Indiana, Kentucky, Maryland, Masachusettes, Michigan and Missouri.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.