Large-flowered tickseed (Coreopsis grandiflora)

Also known as: Bigflower tickseed

Large-flowered tickseed (Coreopsis grandiflora) usually blooms from late spring through early fall. The name "Coreopsis grandiflora" translates to "large flower" in Latin, with "Coreopsis" hinting at its small, bug-like seeds. The common name reflects the distinct black seeds the plant produces.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Large-flowered tickseed

Lifespan

Perennial, Annual

Plant Type

Herb

Plant Height

20 cm to 1 m

Spread

45 cm to 60 cm

Leaf Color

Green

Flower Size

4 cm to 5 cm

Flower Color

Yellow Gold Orange

Images of Large-flowered tickseed

Quickly Identify Large-flowered tickseed

Large, bright yellow flowers with 6-12 ray florets and numerous disk florets.

Compact, oblong achenes in straw-yellow to soft brown tones, less than 1 inch long.

Distinct leaf variation: basal leaves linear, upper leaves deeply lobed, oppositely arranged.

Robust perennial forming dense clumps 1-3 feet (30-91 cm) in height and width.

Practice deadheading for a prolonged floral display of vibrant yellow blooms from late spring to late summer.

Scientific Classification of Large-flowered tickseed

Phylum

Vascular plants

Class

Dicotyledons

Order

Asters bellflowers fanflowers and allies

Family

Daisy

Genus

Calliopsis

Species

Large-flowered tickseed

Planting and Growing of Large-flowered tickseed

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

4-6 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Large-flowered tickseed?

When watering Coreopsis grandiflora, it's essential to ensure the soil is drenched to a depth of a few inches, allowing water to reach the root zone where it's most needed. Always use a watering can or a hose with a gentle spray setting to prevent disturbing the soil too much.

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More About Watering Techniques→

What Are the Sunlight Requirements for Large-flowered tickseed?

Sunlight Requirements: Full sun

Duration of light: 6-8 hours daily

Coreopsis grandiflora should ideally be in full sun conditions with 6-8 hours of direct sunlight each day. This optimal exposure leads to maximum flowering capability and overall lush, vigorous growth, sustaining the plant's vibrancy and bloom longevity.

What are the ideal lighting conditions for Coreopsis grandiflora? ›

How can you achieve the ideal lighting conditions for this plant? ›

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More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Large-flowered tickseed?

Ideal Temperature: 60 ~ 75℉

Coreopsis grandiflora thrives best in a temperature range of 60°F to 75°F. This range allows the plant to maintain its metabolic processes efficiently, promoting robust growth and vibrant blooms. Maintaining this temperature helps the plant avoid stress and supports its overall health.

What Soil is Best for Large-flowered tickseed?

Soil type: Sandy loam, Loam

Soil PH: 6 ~ 7.5

Coreopsis grandiflora thrives in well-draining soil as it prevents water logging, ensuring that the roots don't rot. This feature is essential to its health, as it allows for proper root aeration and nutrient uptake. Choosing moderately fertile soil for Coreopsis grandiflora boosts plant strength and enhances blooming. This nutrient richness supports the plant's growth and improves its overall resilience. The plant prefers soil with a neutral to slightly acidic pH, which helps in optimal nutrient absorption. Maintaining this range encourages vibrant blooms and lush foliage. More About Soil→

How to Fertilize Large-flowered tickseed?

Fertilizer type: Balanced

Coreopsis grandiflora benefits from a balanced fertilizer; therefore, apply liquid fertilizer at a half-strength concentration to avoid overwhelming the plant. A dose of a balanced 10-10-10 fertilizer diluted to half the recommended strength is ideal during the growing season. More About Fertilizing Techniques→

How to Prune Large-flowered tickseed?

Pruning Time: Spring, Summer

Use a pair of sharp scissors or pruning shears to remove spent flowers just above the nearest leaves. This is called 'deadheading' and is crucial for encouraging continuous blooming throughout the growing season. After the first growth spurt in spring, lightly shape the plant by cutting back any overly long or straggly stems to maintain a compact, bushy form. Trim evenly to ensure balanced growth. More About Pruning Techniques→

How to Propagate Large-flowered tickseed plant?

Propagate Time: Spring, Early summer

Sow the seeds in a seed tray filled with a well-draining potting mix. Lightly cover the seeds with soil and water gently. Place the tray in a warm, sunny spot and keep the soil moist but not waterlogged.

Select healthy, non-flowering stems and cut below a node. Remove lower leaves and dip the cut end in rooting hormone. Plant in a pot filled with a soilless mix and cover with a plastic bag to maintain humidity.

In early spring or autumn, dig up the mother plant carefully. Separate the clumps using a sharp knife or spade, ensuring each section has roots. Replant the divisions promptly to foster establishment.

More About Propagating Techniques→

How to Repot Large-flowered tickseed plant?

Repotting frequency: Every 2-3 years

Repotting Coreopsis grandiflora is ideally done when you notice it's becoming root-bound. Signs include roots growing out of the drainage holes, water taking longer to drain, or the plant showing signs of stress. Repot during its growing seasons, like spring or early autumn, when the plant is actively growing.

Choose a pot that's 1-2 inches larger in diameter than the current one and ensure it has adequate drainage holes. This allows the roots more space to grow and prevents water from accumulating at the bottom, reducing the risk of root rot.

Use a well-draining potting mix to ensure good aeration and water retention balance. A quality potting mix provides essential nutrients and reduces the likelihood of waterlogging, which can harm the roots.