Growli

Plant care

Running Tapestry Tiarella (heartleaf foamflower) care

Tiarella cordifolia

Also called heartleaf foamflower, running foamflower.

RHS H7USDA 4-9Mildly toxic to petsIndoor 15-25 cm tall (to 30 cm in flower) and spreading 30-60 cm or more by runners over time

Watering rhythm

Medium indirect light (a couple of metres from a window)

Keep soil consistently moist; water deeply once or twice weekly in dry spells

Light

Medium indirect light (a couple of metres from a window)

Soil

Humus-rich, well-drained woodland loam

Humidity

50-70%

Temp

-34 to 24°C

Pet safety

Mildly toxic to pets

Mature size

15-25 cm tall (to 30 cm in flower) and spreading 30-60 cm or more by runners over time

Care at a glance

Light

Picture the indirect light an east-facing window gives mid-morning — that's the brightness running tapestry tiarella grows fastest in. Partial to full shade outdoors; dappled woodland light is ideal. Tolerates morning sun with afternoon shade if soil stays moist. Deep shade thins flowering and stretches the stolons. You'll know it's right when new leaves come out the same size and colour as the established ones. Smaller, paler new leaves = move closer to the window.

Watering

Aim for keep soil consistently moist; water deeply once or twice weekly in dry spells for running tapestry tiarella, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Native to moist woodland floors, so it dislikes drought. Mulch with leaf mould to hold moisture. Established clumps tolerate brief dry periods but foliage scorches and growth stalls if the root zone dries out.

Soil and pot

Running Tapestry Tiarella grows best in humus-rich, well-drained woodland loam. Wants moisture-retentive soil high in organic matter, slightly acidic to neutral (pH ~5.5-6.5). Amend with compost or leaf mould. Avoid heavy waterlogged clay, which causes crown rot in winter. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Running Tapestry Tiarella sits happiest at around 50-70% humidity and -34 to 24°C (-29 to 75°F). An outdoor woodland perennial that appreciates the ambient humidity of a sheltered, shaded border. No special humidity measures are needed in the garden; airflow matters more than misting to keep foliage dry. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed running tapestry tiarella sparingly. Light feeder. Top-dress with compost or leaf mould in early spring, or apply a balanced slow-release perennial fertiliser once as growth begins. Avoid heavy nitrogen, which produces lush leaves at the expense of flowers. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on running tapestry tiarella in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Leaf scorch in dry soilFoliage browns at the margins when the root zone dries out or the plant gets too much sun. Increase shade, mulch, and keep soil evenly moist.
  • Crown and root rotHeavy, waterlogged soil rots the crown over winter. Plant in well-drained humus-rich soil and never let water pool around the base.
  • Powdery mildew or rustPoor airflow and persistently wet leaves invite fungal spotting. Space plants, water at the base, and remove affected leaves.
  • Frost heave in winterShallow stolons can lift out of the soil during freeze-thaw cycles. Apply a winter mulch and press heaved crowns back in spring.

Propagation

Easiest by division in spring or autumn, or by separating rooted runners (stolons) and replanting them. Seed is also viable for the species but seedlings vary; division keeps the clump true to form. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Running Tapestry Tiarella is mildly toxic to pets. Tiarella is not individually listed on the ASPCA toxic or non-toxic plant database, so its status is uncertain; treat with caution and verify with a vet before assuming safety. Its close relative and hybrid parent Heuchera (Coral Bells/Alumroot) is ASPCA-listed as non-toxic, which is reassuring but not a confirmed listing for foamflower itself. Watch for mild gastrointestinal upset if a pet chews the foliage. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Running Tapestry Tiarella care — frequently asked questions

What is the common name for Tiarella cordifolia?

Tiarella cordifolia is most commonly called Running Tapestry Tiarella, but it is also known as heartleaf foamflower, running foamflower. The names refer to the same species, so care instructions for Running Tapestry Tiarella apply identically to anything sold as heartleaf foamflower.

How much light does running tapestry tiarella need?

Running Tapestry Tiarella grows best in medium indirect light (a couple of metres from a window). Partial to full shade outdoors; dappled woodland light is ideal. Tolerates morning sun with afternoon shade if soil stays moist. Deep shade thins flowering and stretches the stolons.

How often should I water running tapestry tiarella?

Water running tapestry tiarella keep soil consistently moist; water deeply once or twice weekly in dry spells. Native to moist woodland floors, so it dislikes drought. Mulch with leaf mould to hold moisture. Established clumps tolerate brief dry periods but foliage scorches and growth stalls if the root zone dries out. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is running tapestry tiarella toxic to cats and dogs?

Running Tapestry Tiarella is mildly toxic to pets. Tiarella is not individually listed on the ASPCA toxic or non-toxic plant database, so its status is uncertain; treat with caution and verify with a vet before assuming safety. Its close relative and hybrid parent Heuchera (Coral Bells/Alumroot) is ASPCA-listed as non-toxic, which is reassuring but not a confirmed listing for foamflower itself. Watch for mild gastrointestinal upset if a pet chews the foliage.

What USDA hardiness zone does running tapestry tiarella grow in?

Running Tapestry Tiarella is rated for USDA zone 4-9 (hardy garden perennial) and RHS hardiness H7. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Running Tapestry Tiarella deep-dive guides

Every aspect of running tapestry tiarella care, each with its own calibrated guide:

Featured in these plant shortlists

Running Tapestry Tiarella qualifies for 9 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Running Tapestry Tiarella is also commonly called heartleaf foamflower or running foamflower.