Front close-up view of a single Yellow Fully Double Coreopsis flower on white.
A couple of Yellow Fully Double Coreopsis flowers on a light white background.
Yellow Fully Double Coreopsis arranged in a glass with blooms on a white background.
Front close-up view of a single Yellow Fully Double Coreopsis flower on white.
Yellow Fully Double Coreopsis flowers arranged on white background.
Sixteen Yellow Fully Double Coreopsis blooms arranged in a square on a white background.
Side close-up view of a single Yellow Fully Double Coreopsis flower on white.
Yellow Fully Double Coreopsis flowers blooming in the trial gardens at Baker Creek.
Front close-up view of a single Yellow Fully Double Coreopsis flower on white.
A couple of Yellow Fully Double Coreopsis flowers on a light white background.
Yellow Fully Double Coreopsis arranged in a glass with blooms on a white background.
Front close-up view of a single Yellow Fully Double Coreopsis flower on white.
Yellow Fully Double Coreopsis flowers arranged on white background.
Sixteen Yellow Fully Double Coreopsis blooms arranged in a square on a white background.
Side close-up view of a single Yellow Fully Double Coreopsis flower on white.
Yellow Fully Double Coreopsis flowers blooming in the trial gardens at Baker Creek.

Coreopsis Seeds,
Yellow Fully Double

4.34 Reviews#WF114 · 200 seeds
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Description

(Coreopsis grandiflora). These cheerful little blooms look like tiny golden buttons stitched across the garden. Fully double and bright as sunshine, they appear early and continue to bloom with steady enthusiasm. The plants stay compact and easy to place, thriving in a wide range of conditions and drawing in bees from the very start of the season. It’s everything we love in a native-style planting—simple, dependable, and full of life. Due to a lower germination rate, we're including extra seeds in each packet to ensure a full planting.

Plant Details

Botanical Name
Coreopsis grandiflora
Life Cycle
Perennial in zones 4–9
Sun Requirement
8–12 hr.
Days to Germinate
10–21
Days to Maturity
60–90
Planting Depth
Surface sow
Plant Spacing
10 in.
Ideal Temperature
50–75°F
Frost Hardy
Yes

Growing Guide

When to Grow

Direct sow Yellow Fully Double coreopsis in early spring as soon as the soil can be worked, or sow in fall; these plants are frost hardy and perennial in zones 4-9. You can also start seeds indoors 6-8 weeks before the last frost date for an early start. Either way, press the seed onto the soil surface without covering it, as it needs light to germinate. Check your local area's frost dates to determine the best planting time in your region. Learn more about it by checking out our blog post, 'Our Experts Answer Questions, Share Resources.' This variety is an early bloomer and will flower from summer through early fall.

How to Sow and Plant

Sow Yellow Fully Double coreopsis seeds on the surface of the soil, as they need light to germinate. Indoors, use a seed-starting mix and press the seeds lightly onto the soil without covering them. Keep the soil moist and maintain a temperature of around 70 F. Germination typically takes 10-21 days. For outdoor planting, prepare a sunny, well-drained garden bed, scatter the seeds evenly, and lightly press them into the soil surface. Once seedlings are established, harden them off and space them 10 inches apart to allow for proper growth and airflow.

How to Grow

Yellow Fully Double coreopsis thrives in full sun, requiring at least 8-12 hours of direct sunlight daily. It prefers well-draining soil and can also tolerate poor soil conditions as long as water does not pool. Once established, this drought-tolerant variety requires minimal watering and grows well in hot, dry conditions. Deadhead spent flowers to encourage continuous blooming and cut back burned-out plants by one-third after the first bloom cycle for additional flowers later in the season. Fertilizer is generally unnecessary, as over-fertilizing may reduce blooming.

How to Save Seeds

  • Coreopsis are insect-pollinated and there may be some crossing between varieties in the garden. You can enjoy the mixing or use caging techniques and hand pollination to avoid crossing.
  • Saving seed from coreopsis is easy: simply allow the heads to brown and dry on plants and collect seeds. Store in a cool, dry, dark place over winter.

FAQ

Will Yellow Fully Double coreopsis self-seed in my garden?

Yes, this plant is a prolific self-seeder. Allow some flowers to go to seed, and you may see new plants emerge the following year.

How long will Yellow Fully Double coreopsis bloom during the season?

This variety will bloom continuously from mid-summer through early fall, especially if deadheaded regularly.

Can Yellow Fully Double coreopsis be grown in containers?

Yes, it is well-suited for container gardening. Make sure that the container has good drainage and place it in a sunny spot for best results.

Browse our full range of coreopsis seeds.

Customer reviews

4.3 / 5 4 Reviews

What gardeners are saying

  • Easy germination: Quick to germinate, with more seedlings than you can plant.

  • Loads of buds: Healthy plants that bloom heavily once established.

  • Growing tips: Doubles may not show until year two; some saw only singles.

More to grow!

See all Coreopsis Seeds