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Threeleaf Foamflower
Tiarella trifoliata
Easy · Beginner friendlyAbout Threeleaf Foamflower
Three-leaf Foamflower is a Pacific Northwest native perennial producing airy sprays of tiny white flowers above mats of three-parted leaves. Growing 8 to 16 inches tall, it blooms from late spring through early summer in moist forests from Alaska to northern California. A choice native shade groundcover for American West Coast woodland gardens and a quieter cousin of its eastern relative.
- Shade-tolerant
- Deer-resistant
- Native
- Pollinator-friendly
How to care for Threeleaf Foamflower
Watering
- Springevery 3 days
- Summerevery 2 days
- Fallevery 5 days
- Winterevery 10 days
Soil · Well-draining
- Top dressingPine bark mulch10%
- Main mixPotting soil + perlite 2:170%
- DrainageLECA / gravel20%
Never skip the drainage layer — standing water is the top cause of root rot.
FERTILIZER
Balanced Feed 14-14-14
An even feed covers all three needs at once, keeping leaves, roots and blooms moving together with nothing pushed out of balance.
- Nitrogen · Leaves
- Phosphorus · Roots + Blooms
- Potassium · Strength
- Springevery 45 days
- Summerevery 60 days
At a Glance
- NativeNorth America
- Height0.5–1 ft (0.2–0.3 m)
- Spread1–1.5 ft (0.3–0.5 m)
- Flower colorWhite
- Foliage colorGreen
- SoilLoamy, Moisture-retentive, Acidic
- LocationsYard
Bloom time
BLOOM CYCLE
Peak bloom
May–Jun
Airy white flower sprays late spring to early summer
Toxicity
No toxicity has been reported for this plant. Still, it is wise to keep pets from chewing on any houseplant.
Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.
DISTRIBUTION
- Native
- North America
History
Tiarella trifoliata inhabits moist conifer forests from Alaska south to northern California and east to Montana. Linnaeus described it in Species Plantarum (1753). Indigenous peoples of the Pacific Northwest, including the Quinault and Quileute, used leaf poultices for cuts and infusions for sore mouths and eyes, paralleling eastern uses of T. cordifolia.
The species has three-parted leaves unlike the heart-shaped foliage of its eastern cousin, and airy white flower panicles above them. It has been grown sporadically since the 19th century in North American shade gardens and increasingly in restoration plantings of Pacific Northwest forest understories.
The variety unifoliata, sometimes considered a separate species, has simpler single-lobed leaves. Native from Alaska through British Columbia to northern California. A signature understory plant of Pacific Northwest temperate rainforests, long admired by botanists but only recently available in specialty native plant nurseries for West Coast American gardens.
Symbolism & meaning
What It Symbolizes
Threeleaf Foamflower offers a forest whisper, a delicate native of Pacific rainforests where its frothy white flower spikes float like soft mist over the duff. It serves as a true native carpet — a West Coast shade groundcover for moist coniferous understories. A perennial that asks for filtered light, gentle moisture, and the company of Douglas firs.
- Forest whisper — delicate native of Pacific rainforests
- Native carpet — West Coast native shade groundcover
Where the Name Comes From
'trifoliata' from Latin means three-leaved, for the distinctive three-part compound leaves.
Uses & Fun Facts
- Maple-leaved foamflower spreads across moist woodland floors
- Frothy white flower spikes feed early native bees
- Native Pacific Northwest foamflower for shaded woodland borders
Related plants
More Tiarella plants
Plants with similar care
Red BuckeyeAesculus pavia
Blue BugleAjuga genevensis
Pyramidal BugleAjuga pyramidalis
Carpet BugleAjuga reptans
Frequently asked questions
How often should I water Threeleaf Foamflower?
In summer, water about every 2 days; in winter, about every 10 days. Adjust for heat, pot size and drainage.
How much light does Threeleaf Foamflower need?
Part shade: 2–4 hrs direct. Watch the leaves — scorching or stretching means the light needs adjusting.
Is Threeleaf Foamflower toxic to cats or dogs?
No toxicity has been reported for this plant. Still, it is wise to keep pets from chewing on any houseplant. Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.
Is Threeleaf Foamflower easy to grow?
Yes — it is considered an easy, beginner-friendly plant.
When does Threeleaf Foamflower bloom?
It typically blooms May–Jun in the Northern Hemisphere.
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