Hairy Coreopsis (Star Tickseed) care

Light

Most houseplants will scorch where hairy coreopsis thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Prefers full sun but tolerates light dappled shade, especially in the southeastern US where afternoon shade reduces heat stress. Full sun maximises flowering. Avoid deep shade. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for low to moderate; water during establishment, then as needed during drought for hairy coreopsis, 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. Moderate drought tolerance once established. Water regularly during the first growing season to establish roots. In subsequent years, water during dry spells longer than 2–3 weeks. Avoid consistently wet conditions.

Soil and pot

Hairy Coreopsis grows best in well-drained sandy, rocky, or loam soil. Naturally grows on rocky outcrops, dry open woodlands, and sandy soils in the southeastern US. Tolerates poor fertility; avoid rich, wet soils. pH 5.5–7.0. Good drainage is critical to prevent root rot. 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

Hairy Coreopsis sits happiest at around 40–70% humidity and -15–38°C (5–100°F). Native to the humid southeastern US and tolerates higher humidity than many dryland coreopsis. Good air circulation around plants helps prevent fungal leaf diseases in hot, humid summers. 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 hairy coreopsis sparingly. Minimal fertiliser needed. A light top-dressing of compost in spring is sufficient on poor soils. Avoid high-nitrogen fertilisers which promote vegetative growth at the expense of flowers. 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 hairy coreopsis in the Growli community. Each is annotated with the most common cause so you know where to start.

• Leaf spot diseases — In the humid Southeast, Cercospora and Septoria leaf spots cause brown lesions on foliage. Space plants well for airflow, water at the base, and remove affected leaves. Fungicide is rarely required.
• Short-lived in poorly drained soils — This species declines quickly in heavy, waterlogged clay. Amend clay soils with coarse grit and organic matter, or grow in raised beds to ensure drainage.
• Caterpillar browsing — Several butterfly larvae (including bordered patch butterfly) feed on Coreopsis leaves. Damage is usually minor and supports native wildlife; hand-pick if infestation is severe.

Propagation

Sow seed in autumn or cold-stratify for 4–6 weeks before spring sowing. Divide established clumps in early spring. Stem cuttings taken in late spring to early summer root readily with bottom heat. 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

Hairy Coreopsis is pet-safe. Coreopsis is listed by the ASPCA as non-toxic to dogs and cats. No toxic compounds have been identified in Coreopsis pubescens. 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.

Hairy Coreopsis deep-dive guides

Every aspect of hairy coreopsis care, each with its own calibrated guide:

• Hairy Coreopsis watering schedule
• Hairy Coreopsis light requirements
• Best soil mix for hairy coreopsis
• Hairy Coreopsis fertilizing guide
• When to repot hairy coreopsis
• How to propagate hairy coreopsis
• Hairy Coreopsis growth rate & size
• Hairy Coreopsis cold hardiness
• Hairy Coreopsis temperature & humidity
• Is hairy coreopsis toxic to cats & dogs?
• Is hairy coreopsis toxic to cats?
• Is hairy coreopsis toxic to dogs?
• Getting hairy coreopsis to bloom

Featured in these plant shortlists

Hairy Coreopsis qualifies for 10 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 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

Hairy Coreopsis is also commonly called Hairy Coreopsis or Star Tickseed.

• Greater Coreopsis care — light, water and common problems
• Pink Coreopsis care — light, water and common problems
• Lobed Tickseed care — light, water and common problems
• All 6887 plant care guides in the Growli library