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Plant care

Brown Spiderwort (Teddy Bear Plant) care

Siderasis fuscata

Also called Teddy Bear Plant, Hairy Spiderwort, Bear's Ear.

RHS H1bUSDA 11-12Mildly toxic to petsIndoor 20-30 cm tall

Watering rhythm

7-10days

When the top 2-3 cm of soil is dry, roughly every 7-10 days

Light

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

Soil

Well-draining peat-free potting compost

Humidity

60-80%

Temp

18-27°C

Pet safety

Mildly toxic to pets

Mature size

20-30 cm tall

Care at a glance

Light

The Goldilocks zone. Not the south-facing windowsill (too hot, too direct), not the back of the room (too dim, growth stalls). Tolerates low to medium indirect light and makes a good choice for less bright indoor positions. Brighter indirect light encourages flowering. Avoid direct sunlight which fades the deep leaf color. If you can't decide, a free phone lux-meter app aimed at the leaf at noon should read between 800 and 1,500 lux.

Watering

Watering brown spiderwort: when the top 2-3 cm of soil is dry, roughly every 7-10 days. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Keep evenly moist but not waterlogged. The velvety leaves should never be watered from above as moisture trapped in the hairs causes rot. Water at soil level only.

Soil and pot

Brown Spiderwort grows best in well-draining peat-free potting compost. A moisture-retentive but free-draining peat-free compost with added perlite suits this plant. Slightly acidic pH of 5.5-6.5 is ideal. Excellent drainage prevents root rot in the humid conditions it prefers. 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

Brown Spiderwort sits happiest at around 60-80% humidity and 18-27°C (64-80°F). Requires high humidity. An excellent terrarium plant where humidity naturally remains high. In open rooms, a pebble tray or humidifier is needed to prevent leaf edge browning. If you keep the room above 18 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 brown spiderwort sparingly. Feed monthly during spring and summer with a dilute balanced liquid fertiliser at half strength. Minimal feeding is required for this slow-growing compact plant; overfed plants can lose their compact habit. 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 brown spiderwort in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Leaf rot from wet foliageNever mist or water from above; the dense hairs trap moisture against the leaf surface and cause rot patches.
  • Brown leaf edges from low humidityIncrease humidity with a terrarium setup, pebble tray, or humidifier. This is a demanding plant for dry indoor environments.
  • Root rot from overwateringAllow the top soil to dry between waterings. Use a well-draining mix and pot with drainage holes.
  • Leggy growthUnusual for this rosette species but can occur in very low light. Move to brighter indirect light to maintain its compact form.
  • Mealybugs in leaf axilsCheck the centres of the rosette regularly. Treat with isopropyl alcohol on a cotton swab as a first response.

Companion plants

Brown Spiderwort pairs well with Fittonia albivenis, Peperomia caperata, Selaginella uncinata, and Episcia cupreata. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Propagate by carefully separating offsets or dividing the clump at repotting time in spring. Each division should have roots and several leaves. Keep divisions warm and humid until established. 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

Brown Spiderwort is mildly toxic to pets. Siderasis fuscata is not listed individually by the ASPCA. As a member of the Commelinaceae family — which includes some mildly irritant members — a precautionary 'mildly-toxic' rating is applied. Sap may cause mild skin irritation; ingestion may cause gastrointestinal upset in pets. 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.

Brown Spiderwort care — frequently asked questions

What is the common name for Siderasis fuscata?

Siderasis fuscata is most commonly called Brown Spiderwort, but it is also known as Teddy Bear Plant, Hairy Spiderwort, Bear's Ear. The names refer to the same species, so care instructions for Brown Spiderwort apply identically to anything sold as Teddy Bear Plant.

How much light does brown spiderwort need?

Brown Spiderwort grows best in medium indirect light (a couple of metres from a window). Tolerates low to medium indirect light and makes a good choice for less bright indoor positions. Brighter indirect light encourages flowering. Avoid direct sunlight which fades the deep leaf color.

How often should I water brown spiderwort?

Water brown spiderwort when the top 2-3 cm of soil is dry, roughly every 7-10 days. Keep evenly moist but not waterlogged. The velvety leaves should never be watered from above as moisture trapped in the hairs causes rot. Water at soil level only. 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 brown spiderwort toxic to cats and dogs?

Brown Spiderwort is mildly toxic to pets. Siderasis fuscata is not listed individually by the ASPCA. As a member of the Commelinaceae family — which includes some mildly irritant members — a precautionary 'mildly-toxic' rating is applied. Sap may cause mild skin irritation; ingestion may cause gastrointestinal upset in pets.

What USDA hardiness zone does brown spiderwort grow in?

Brown Spiderwort is rated for USDA zone 11-12 (indoor-only in temperate climates) and RHS hardiness H1b. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Brown Spiderwort deep-dive guides

Every aspect of brown spiderwort care, each with its own calibrated guide:

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Brown Spiderwort qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Brown Spiderwort is also known as Teddy Bear Plant, Hairy Spiderwort, and Bear's Ear.