Purple Wreath (Queen's Wreath) care

Light

Most houseplants will scorch where purple wreath thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Requires full sun — at least 5–6 hours of direct sunlight daily — to produce its abundant racemes of violet flowers. Plants in partial shade grow vigorously but bloom sparsely. Best flowering occurs in the hottest, sunniest positions. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for every 5–7 days during the growing season; every 10–14 days in cooler months for purple wreath, 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. Water deeply but allow the soil to dry slightly between waterings. Once established, it shows good drought tolerance. Overwatering leads to root rot. Highly tolerant of coastal winds and periods of moderate drought.

Soil and pot

Purple Wreath grows best in moist, fertile, well-draining loam. Grows best in a rich loam with good drainage. Slightly acidic to neutral pH is preferred. Tolerant of a range of soil types but dislikes waterlogged or compacted soils. Mulch around the root zone to retain moisture in hot climates. 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

Purple Wreath sits happiest at around 50–70% humidity and 10–35°C (50–95°F). As a tropical vine, it prefers warm, moderately humid conditions. Tolerates the humidity variation typical of tropical and subtropical coastal climates. Does not require artificially elevated humidity if grown outdoors. If you keep the room above 10–35°C 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 purple wreath sparingly. Feed monthly during the growing season with a balanced slow-release fertiliser, or apply a liquid balanced fertiliser every 2–4 weeks from spring through summer. Compost or well-rotted manure applied as a mulch in spring also benefits this heavy feeder. 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 purple wreath in the Growli community. Each is annotated with the most common cause so you know where to start.

• Failure to bloom — Almost always caused by insufficient sunlight. Petrea requires intense direct sun to initiate flowering. Ensure the plant is not shaded by neighbouring plants or structures. Young plants may take 2–3 years to bloom reliably.
• Scale insects — Brown scale can colonise the rough stems and leaf undersides. Treat with horticultural oil or a systemic insecticide. Scale is most prevalent during dry periods; improving ventilation and monitoring regularly helps prevent outbreaks.
• Frost damage — Tender to frost; established mature plants may tolerate brief temperatures to -1°C but young plants are highly susceptible. In borderline zones (9–10), plant against a sheltered south-facing wall and mulch the root zone heavily in winter.

Propagation

Take semi-hardwood tip cuttings (12–15 cm) in summer. Dip in rooting hormone and insert into a moist perlite and coir mix. Maintain warmth (24–28°C) and high humidity. Roots develop in 4–8 weeks. Seed propagation is possible but germination is slow and irregular; vegetative cuttings are preferred. 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

Purple Wreath is mildly toxic to pets. Petrea volubilis is not listed in the ASPCA toxic or non-toxic plant database. It is not individually documented as having known toxic principles, but belongs to the Verbenaceae family. As a precaution, treat as potentially irritating if ingested and keep curious pets away. Consult a vet if ingestion is suspected. 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.

Purple Wreath deep-dive guides

Every aspect of purple wreath care, each with its own calibrated guide:

• Common purple wreath problems & fixes
• Purple Wreath watering schedule
• Purple Wreath light requirements
• Best soil mix for purple wreath
• Purple Wreath fertilizing guide
• When to repot purple wreath
• How to propagate purple wreath
• How to prune purple wreath
• What's eating my purple wreath?
• Purple Wreath growth rate & size
• Purple Wreath cold hardiness
• Purple Wreath temperature & humidity
• Is purple wreath toxic to cats & dogs?
• Is purple wreath toxic to cats?
• Is purple wreath toxic to dogs?

Featured in these plant shortlists

Purple Wreath qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• 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 fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Purple Wreath is also known as Purple Wreath, Queen's Wreath, Sandpaper Vine, and Blue Petrea.

• Anthurium andraeanum 'Kozohara' care — light, water and common problems
• Anthurium andraeanum 'Midori' care — light, water and common problems
• Anthurium andraeanum 'President' care — light, water and common problems
• All 8452 plant care guides in the Growli library