Early Sunrise Yellow Double

Coreopsis grandiflora

Coreosside

Also known as

Coreopsis

Scientific classification

Class

Dicotyledons

Division

Angiospermae

Family

Asteraceae or Compositae

Order

Asterales

Genus

Coreopsis

Species

grandiflora

Key information

Description

Ornamental herbaceous perennial with a bushy habitus, prized for its showy, brightly-coloured flower heads at the top of the erect stems, which add an accent of colour and liveliness to outdoor spaces such as balconies and terraces as well as in flowerbeds, even in arrangements with other flowering species. Rustic and easy to grow, it tolerates the winter cold.

Variety description

Perennial plant with a very long and showy flowering period in late spring to late summer.

Origin and history

Curiosities and special features

The flowers are also suitable as cut flowers, to create colourful bouquets.

Also of high ornamental value is the species Coreopsis lanceolata belonging to the same botanical genus.

Origin and distribution

Native species of the range extending from eastern Canada to the United States. The botanical genus has undergone intensive genetic improvement, which has led to numerous interspecific hybrids distinguished by their height, the colour shade of their flowers and in some varieties also by their greater resistance to heat and cold.

Main features

Flower size

The flower is small, giving a pleasant final effect of lightness and elegance in a lush bloom.

Leaf

lanceolate, pinnate

Flowering period

Flowering lasts from mid-spring to late summer and lasts between 90 and 120 days.

Leaf colour

The leaf is solid-coloured, emphasising the bright hues of the flowers.

Plant height

The plant's height varies from 0.25 to 0.3 m, making it also suitable as a first or second-stage plant in compositions mixed with other ornamental grasses, creating highly decorative overall effects.

Lifespan

It is a perennial plant that can remain in the flowerbed for several years.

Where to plant

Very versatile, suitable for adding a bright and lively note to flowerbeds , planters, rock gardens Also perfect in flowerbeds with other species.

Stem

The stem is herbaceous; the variety has no thorns.

Flower

The flower is semi-double in shape, small in size, with a gamopetalous corolla and single-coloured petals. It flowers from mid-spring to late summer, with a flowering period of between 90 and 120 days. It is not particularly attractive to pollinating insects.

Growth

Variety with medium to vigorous growth.

Plant habit

The bushy habit makes it possible to create homogeneous and formally proportioned compositions.

Branching

Variety with medium branching, defined by a proportionate ratio of foliage to flowers.

Growing conditions

PH

It requires a slightly acidic soil or substrate pH between 6.0 and 6.5.

Soil preparation

Before transplanting, dig 20/30 cm deep by removing any weeds and bulky stones, continue by burying organic or chemical slow-release fertiliser and breaking up coarser clods with the help of a hoe. Finally, apply professional quality substrate on the surface to an average height of 5/10 cm and carefully level.

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Sun exposure

It offers the best Growth and flowering results when exposed in Half Shade, Full Sun.

Ideal climate and temperature

The ideal temperature is between 10 and 20 °C during vegetative growth. The vital temperature is between -5 and 30 °C

Use

Appreciated for its lush flowering with bright, vivid colours in

Outdoor ornamental

Hardiness

Highly hardy variety; adapts to different soil types, also ideal for beds in cold winter climates, even in temporarily frozen soil conditions.

Soil

It prefers a medium-textured, well-draining soil; a substrate for spring plants based on peat and perlite is recommended for use in planters or tubs.

Difficulty

Cultivation of this variety of Coreopsis grandiflora is extremely easy, making it even more valuable for use in your outdoor green spaces.

Growing tips

Some useful cultivation tips to achieve suitable vegetative growth followed by excellent flowering:

Expose the plant to maximum light Always maintain an abundant fertilisation to avoid yellowing of the vegetation.

Combinations with other plants

Suitable for creating harmonious compositions with other ornamental species such as Astilbe, Canna, Echinacea, Gaillardia, Gaura, Phlox paniculata. It is advisable to apply the correct planting density by arranging the plants in relation to their height and developed habit, as well as according to the desired colour effect in order to guarantee a suitable growth of each specimen and to obtain a proportionate whole.

Care and plant health

Planting

In flowerbeds, an average density of 10 plants per square metre is recommended in order to allow each individual specimen to grow properly and achieve a uniform and proportionate result.

Propagation

Propagation can take place via such an apical.

Watering

Use rainwater, alternatively canal water, hand watering or irrigation system. Take extra care when transplanting as the plant in the new planting site may be more susceptible to stress, so avoid dry spells and maintain constant humidity. Afterwards, keep the soil or substrate moist but free from stagnation which can cause root rot and dieback, while preventing water shortage stress to avoid leaf yellowing and bud wilt. Increase the frequency of irrigation during the warmer period and reduce watering in winter.

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Fertilising

During pre-transplant soil preparation, carry out basic fertilisation by burying organic or slow-release chemical fertiliser. After proper establishment in the new planting site, during the spring-summer period, in order to avoid yellowing of the vegetation, regularly apply a balanced liquid fertiliser for flowering plants to the soil or substrate, to be diluted in the irrigation water according to the instructions on the relevant information label.

Read more on the Joyflo blog

Edibility and toxicity

Pet safety

Ingestion toxicity for pets not known, consider case-specific.

Edibility for humans

Non-edible.

Toxicity for humans

Ingestion toxicity not known, avoid ingestion.

Expert advice

Tip

It is advisable to avoid water stress and especially deficiencies in fertilisation.

Profile curated by Walter Zoccarato.