Whitley's Speedwell care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Requires full sun for at least 6 hours daily. In partial shade it becomes leggy and flowers sparsely. Best sited on a south- or west-facing slope or raised bed. If your only bright window faces south, that's perfect for whitley's speedwell — same window any aroid would fry on.

Watering

Watering whitley's speedwell: every 10–14 days during active growth; minimal in winter. 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. Drought-tolerant once established. Water moderately during spring growth and flowering; reduce significantly after flowering and through winter. Standing moisture causes crown rot.

Soil and pot

Whitley's Speedwell grows best in gritty, sharply drained alpine mix. Use a mix of 50% coarse grit or pea gravel with loam or garden compost. Neutral to slightly alkaline pH (6.5–7.5). Avoid heavy clay or moisture-retentive soils. 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

Whitley's Speedwell sits happiest at around Low, 20–40% humidity and -15 to 25°C (5 to 77°F). Adapted to low-humidity alpine conditions. High humidity combined with poor air circulation promotes fungal disease. Grow in open, exposed positions. 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 whitley's speedwell sparingly. Apply a low-nitrogen, high-potassium granular fertiliser (e.g. tomato-type 5-5-10) once in early spring. Over-feeding produces lush growth at the expense of flowering. 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 whitley's speedwell in the Growli community. Each is annotated with the most common cause so you know where to start.

• Crown rot — Caused by excess winter moisture around the crown. Improve drainage by top-dressing with grit and ensuring the planting site does not sit in standing water.
• Powdery mildew — Can appear in humid, poorly ventilated conditions. Improve air circulation; avoid overhead watering. Treat with a dilute potassium bicarbonate spray if severe.
• Sparse flowering — Usually caused by insufficient sun or excessive nitrogen fertiliser. Move to a sunnier position and switch to a low-nitrogen feed.

Propagation

Divide established clumps in early spring or autumn. Alternatively, take 3–5 cm softwood stem cuttings in late spring, insert in gritty compost and keep barely moist until rooted (4–6 weeks). 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

Whitley's Speedwell is pet-safe. Veronica species are not listed as toxic by the ASPCA. The genus has no documented toxic principle for dogs or cats; generally considered non-toxic. 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.

Whitley's Speedwell deep-dive guides

Every aspect of whitley's speedwell care, each with its own calibrated guide:

• Common whitley's speedwell problems & fixes
• Whitley's Speedwell watering schedule
• Whitley's Speedwell light requirements
• Best soil mix for whitley's speedwell
• Whitley's Speedwell fertilizing guide
• When to repot whitley's speedwell
• How to propagate whitley's speedwell
• How to prune whitley's speedwell
• What's eating my whitley's speedwell?
• Whitley's Speedwell growth rate & size
• Whitley's Speedwell cold hardiness
• Whitley's Speedwell temperature & humidity
• Is whitley's speedwell toxic to cats & dogs?
• Is whitley's speedwell toxic to cats?
• Is whitley's speedwell toxic to dogs?
• All 14 Veronica varieties
• Getting whitley's speedwell to bloom

Featured in these plant shortlists

Whitley's Speedwell qualifies for 12 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best pet-safe low-maintenance plants — Non-toxic to cats and dogs and forgiving of forgotten watering — the easiest safe choices for a busy pet household.
• Best pet-safe flowering plants — Flowering houseplants the ASPCA lists as non-toxic to cats and dogs — colour and blooms in a pet home, without the worry.
• Best pet-safe plants for bright light — Non-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
• Best small & tabletop houseplants — Compact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Best houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Best cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
• Best small pet-safe plants — Compact, tabletop houseplants that are also ASPCA non-toxic to cats and dogs — safe greenery for a desk or shelf.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Whitley's Speedwell is also commonly called Whitley's Speedwell.

• St Dabeoc's heath care — light, water and common problems
• Bicolor St Dabeoc's heath care — light, water and common problems
• William Buchanan heath care — light, water and common problems
• All 8452 plant care guides in the Growli library