How big does Threadleaf coreopsis grow?

About 60 cm × 60 cm after ten years (height × width). Its ultimate size is 30–90 cm × 45–60 cm.

What soil does Threadleaf coreopsis grow in?

It tolerates these soils: average garden soil, sandy.

Is Threadleaf coreopsis hardy?

Hardy down to -40 °C (USDA zone 3, RHS H7). It gets through winter in every part of the country.

Is Threadleaf coreopsis toxic to dogs?

No. Reliable sources list it as non-toxic to dogs.

Is Threadleaf coreopsis toxic to cats?

No. Reliable sources list it as non-toxic to cats.

When does Threadleaf coreopsis flower?

Flowering: June–September, yellow.

How much water does Threadleaf coreopsis need?

Water need: medium. Drought tolerance: medium.

How much does Threadleaf coreopsis cost?

It sells for roughly €4.10 to €8.90 in local shops, depending on size.

Threadleaf coreopsis

Coreopsis verticillata

Threadleaf coreopsis (Coreopsis verticillata) is a perennial that reaches 60 cm × 60 cm after ten years. Light: full sun, part shade. Hardy down to -40 °C. Drought tolerance: medium. Non-toxic to dogs and cats. Sold in local shops from about €4.10.

Illustration of Threadleaf coreopsis — An illustration of the typical shape of the mature plant, not a photo.

What it's good for, and what it isn't

An airy perennial with fine, thread-like foliage, covered in starry yellow flowers from early summer into autumn. It is undemanding and long-lived in a sunny, well-drained spot and takes heat well, though it flowers better with some watering in long droughts. It flops in rich or moist soil and spreads slowly by short rhizomes.

Watch out for

Slugs and snails can graze the new shoots in spring. The crown may rot in wet, poorly drained soil, and the stems sprawl in rich soil.

Key facts

Light: Full sun, Part shade
Water need: Medium
Care: Low
Size after 10 years: 60 cm × 60 cm
Hardiness: down to -40 °C
Foliage: Deciduous
Flowering: J F M A M J J A S O N D June–September, yellow

Group	Perennial
Light	Full sun, Part shade
Size after 10 years	60 cm × 60 cm
Ultimate size	30–90 cm × 45–60 cm
Hardiness	down to -40 °C (USDA 3, RHS H7)
Soil	Average garden soil, Sandy
Foliage	Deciduous
Flowering	June–September, yellow
Water need	Medium
Drought tolerance	Medium
Maintenance	Low
Root aggressiveness	Low
Suckering	no
Spreading	Medium
Distance from buildings	no data
Distance from paving	no data
Litter	not typical
Planting distance	40 cm
For dogs	Non-toxic
For cats	Non-toxic
For children	no data
Typical price	from about €4.10

Toxicity data is for information only. If your pet or child has eaten a plant, contact a vet or a doctor.

Sizes and prices available

The same plant is sold as a small pot and as a specimen several metres tall, and the price follows. Prices are rounded and for guidance only.

Size	Typical price
25-30 cm	approx. €5.50
size not stated	approx. €4.10 – €8.90

Frequently asked questions

Data updated: October 13, 2026 · How our data is made

Appears in these lists

Perennials for part shade Perennials for full sun Perennials that flower all summer Plants that are non-toxic to dogs Plants that are non-toxic to cats Perennials for pollinators Plants for containers Low-maintenance perennials Plants for a Mediterranean garden

Compare with similar plants

Threadleaf coreopsis vs Large-flowered tickseed

Looks good next to it

Portugal laurel

Prunus lusitanica

Barren strawberry

Waldsteinia ternata

David viburnum

Viburnum davidii