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Plant care

Ohio Spiderwort (Smooth Spiderwort) care

Tradescantia ohiensis

Also called Ohio Spiderwort, Smooth Spiderwort, Blue Jacket.

RHS H6USDA 4-9Mildly toxic to petsIndoor 60–90 cm (2–3 ft) tall and 45–75 cm (18–30 in) wide.

Watering rhythm

Bright indirect light (just back from a sunny window)

Weekly to fortnightly; drought-tolerant once established

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Light

Bright indirect light (just back from a sunny window)

Soil

Adaptable — loam, clay, sand, or gravelly soil

Humidity

Low to high

Temp

-30°C to 38°C

Pet safety

Mildly toxic to pets

Mature size

60–90 cm (2–3 ft) tall and 45–75 cm (18–30 in) wide.

Care at a glance

Light

Ohio Spiderwort is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Flowers most prolifically in full sun (6+ hours); tolerates light partial shade but becomes lax and blooms less freely in shadier spots. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water ohio spiderwort weekly to fortnightly; drought-tolerant once established. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Adapts to moist or dry conditions; blooms best with consistent moisture but will survive extended dry spells through its robust root system. Avoid prolonged waterlogging.

Soil and pot

Ohio Spiderwort grows best in adaptable — loam, clay, sand, or gravelly soil. One of the most soil-tolerant native perennials; grows in heavy clay, sandy loam, and gravelly soils. Average to poor fertility suits it best as rich soil promotes excessive leafy growth. 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

Ohio Spiderwort sits happiest at around Low to high humidity and -30°C to 38°C (-22°F to 100°F). Tolerates the full humidity range of its native range across the eastern United States; good air circulation reduces the risk of rust or leaf-spot disease in humid climates. 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 ohio spiderwort sparingly. Fertilising is unnecessary and counter-productive in most garden soils; if the plant is very pale, apply a balanced feed once in early spring only. 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 ohio spiderwort in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Leaf rust and fungal leaf spot — Yellow or brown lesions in humid conditions with poor air circulation; thin overcrowded clumps, avoid wetting foliage, and divide every 3–4 years to improve ventilation.
  • Slugs and aphids — Emerging spring growth and soft shoot tips are susceptible; apply iron phosphate slug bait in early spring and use a strong water spray or insecticidal soap for aphid colonies.
  • Excessive self-seeding — Plants can colonise large areas via prolific self-seeding; deadhead spent flowers before seed sets, or cut all stems to 15 cm (6 in) after the first flush of bloom.

Propagation

Division of established clumps in spring or autumn is the easiest method; seed can also be sown in autumn for spring germination, though seedlings may vary in flower colour. 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

Ohio Spiderwort is mildly toxic to pets. T. ohiensis is not individually listed on the ASPCA toxic plant database, but the genus includes Tradescantia fluminensis (Inch Plant), which ASPCA classifies as toxic to cats, dogs, and horses (causing dermatitis). Sap of native spiderworts can cause skin and eye irritation in some individuals and mild gastrointestinal upset if ingested by pets; treat as mildly toxic and keep pets from chewing plants. 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.

Ohio Spiderwort care — frequently asked questions

What is the common name for Tradescantia ohiensis?

Tradescantia ohiensis is most commonly called Ohio Spiderwort, but it is also known as Ohio Spiderwort, Smooth Spiderwort, Blue Jacket. The names refer to the same species, so care instructions for Ohio Spiderwort apply identically to anything sold as Smooth Spiderwort.

How much light does ohio spiderwort need?

Ohio Spiderwort grows best in bright indirect light (just back from a sunny window). Flowers most prolifically in full sun (6+ hours); tolerates light partial shade but becomes lax and blooms less freely in shadier spots.

How often should I water ohio spiderwort?

Water ohio spiderwort weekly to fortnightly; drought-tolerant once established. Adapts to moist or dry conditions; blooms best with consistent moisture but will survive extended dry spells through its robust root system. Avoid prolonged waterlogging. 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 ohio spiderwort toxic to cats and dogs?

Ohio Spiderwort is mildly toxic to pets. T. ohiensis is not individually listed on the ASPCA toxic plant database, but the genus includes Tradescantia fluminensis (Inch Plant), which ASPCA classifies as toxic to cats, dogs, and horses (causing dermatitis). Sap of native spiderworts can cause skin and eye irritation in some individuals and mild gastrointestinal upset if ingested by pets; treat as mildly toxic and keep pets from chewing plants.

What USDA hardiness zone does ohio spiderwort grow in?

Ohio Spiderwort is rated for USDA zone 4-9 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Ohio Spiderwort deep-dive guides

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

Featured in these plant shortlists

Ohio Spiderwort qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Ohio Spiderwort is also known as Ohio Spiderwort, Smooth Spiderwort, and Blue Jacket.