Also known as American Tickseed · Big-Flowered Tickseed · Bigflower Coreopsis
Coreopsis grandiflora, the large-flowered tickseed, is a vibrant perennial boasting large, daisy-like yellow flowers, ideal for sunny borders and attracting pollinators.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Requires at least 6-8 hours of direct sunlight daily for best flowering.
Moderate to Low
50% intensity
Allow soil to dry slightly between waterings. Prefers well-drained soil.
Well-drained
50% intensity
Moderate
50% intensity
Prefers average room temperatures (18-24°C). Tolerates heat well.
Low
25% intensity
Fertilize sparingly in spring. Over-fertilizing can reduce blooms.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly during its active growth period, especially in dry spells. Allow the soil to dry slightly between waterings. Reduce watering in fall and winter when the plant is dormant.
Ensure good drainage to prevent root rot, as this plant prefers to be on the drier side.
Deadhead spent flowers regularly to encourage continuous blooming and prevent self-seeding. In late fall or early spring, cut back old foliage to about 10-15 cm from the ground.
This tidies the plant and promotes vigorous new growth for the upcoming season.
Easily propagated by seed sown in spring or fall. Can also be divided in early spring. Seeds can be started indoors 6-8 weeks before the last frost or sown directly outdoors after the danger of frost has passed.
Division is a good method to maintain desired traits.
Container-grown plants benefit from repotting every 2-3 years in early spring before new growth begins. Choose a pot with good drainage and fresh, well-draining potting mix.
This helps to refresh the soil and provide more space for root development.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Large-Flowered Tickseed (Coreopsis grandiflora)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Coreopsis |
| Species | Coreopsis grandiflora |
Similar in genus Coreopsis
Answers based on plant encyclopedia data
