Everlasting Sweet Pea (Perennial sweet pea) care

Light

Everlasting Sweet Pea needs sun on the leaves, not just bright ambient room light. Full sun gives the heaviest flowering, though it tolerates light part shade. Plenty of light keeps the scrambling stems sturdy. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water everlasting sweet pea weekly while establishing; drought-tolerant once mature. 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. Water regularly in the first season to settle the deep roots. Established plants need watering only in prolonged dry spells.

Soil and pot

Everlasting Sweet Pea grows best in well-drained, average to fertile soil. Adaptable to most well-drained soils including poor and chalky ground, near-neutral to alkaline. Avoid waterlogged sites; it thrives where fussier plants fail. 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

Everlasting Sweet Pea sits happiest at around 40-60% humidity and -10-25°C (14-77°F). Untroubled by ambient outdoor humidity. Good airflow limits the powdery mildew that can appear in late summer. 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 everlasting sweet pea sparingly. Light feeder. A spring mulch of compost is usually enough; an occasional high-potash feed boosts flowering but is rarely necessary on decent soil. 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 everlasting sweet pea in the Growli community. Each is annotated with the most common cause so you know where to start.

• Powdery mildew — Grey-white film on foliage in dry late summer. Improve airflow and cut back affected stems; the plant regrows readily.
• Aggressive self-seeding — It seeds and spreads freely and can become invasive in mild climates. Deadhead before pods ripen to keep it in bounds.
• Aphids — Cluster on soft new shoots and flower stalks. Dislodge with water or treat early before colonies build.
• Bare, leggy base — Lower stems can go bare as the plant climbs. Cut back hard after flowering or in late winter to force fresh basal growth.

Propagation

From seed (chip or soak the hard coat before sowing) or by careful division of the crown in spring, though the deep taproot resents disturbance. Self-sown seedlings transplant best when young. 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

Everlasting Sweet Pea is pet-safe. ASPCA-listed as non-toxic to dogs and cats (the ASPCA 'Sweet Pea' entry covers exactly this species, Lathyrus latifolius). Note it is classified toxic to horses, with aminopropionitrile causing neurological signs in equines, so keep it out of horse pasture. 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.

Everlasting Sweet Pea deep-dive guides

Every aspect of everlasting sweet pea care, each with its own calibrated guide:

• Everlasting Sweet Pea watering schedule
• Everlasting Sweet Pea light requirements
• Best soil mix for everlasting sweet pea
• Everlasting Sweet Pea fertilizing guide
• When to repot everlasting sweet pea
• How to propagate everlasting sweet pea
• Everlasting Sweet Pea growth rate & size
• Everlasting Sweet Pea cold hardiness
• Everlasting Sweet Pea temperature & humidity
• Is everlasting sweet pea toxic to cats & dogs?
• Is everlasting sweet pea toxic to cats?
• Is everlasting sweet pea toxic to dogs?
• Getting everlasting sweet pea to bloom

Featured in these plant shortlists

Everlasting Sweet Pea qualifies for 13 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 trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best pet-safe trailing & hanging plants — Trailing and climbing plants the ASPCA lists as non-toxic to cats and dogs — safe for shelves and hanging pots in a pet home.
• 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 pet-safe large indoor plants — Big, floor-standing houseplants the ASPCA lists as non-toxic to cats and dogs — a statement plant that is safe around pets.
• 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.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Everlasting Sweet Pea is also commonly called Perennial sweet pea or Everlasting pea.

• Peace lily care — light, water and common problems
• Bird of paradise care — light, water and common problems
• Hoya care — light, water and common problems
• All 1284 plant care guides in the Growli library