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Rudbeckia hirta Autumn Colours

Rudbeckia hirta Autumn Colors
Black-eyed Susan, Gloriosa Daisy, Yellow Ox-eye Daisy

4,0/5
3 reviews
3 reviews
3 reviews
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Still in bloom mid-October despite the numerous rains.

tania, 14/10/2024

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More information

Like large daisies, 12 cm (4.7 in) wide and blooming in a symphony of autumn colours, these rudbeckia offer a palette of shades in red-bronze, copper-orange, yellow, and chocolate, on compact plants that are as beautiful in pots as they are in flowerbeds. Easy to grow as an annual, this short-lived perennial quickly forms a modest clump which self-seeds abundantly. Place in full sun in ordinary, moist to dry soil.
Flower size
12 cm
Height at maturity
50 cm
Spread at maturity
30 cm
Exposure
Sun
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Best planting time March to April
Recommended planting time March to May
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Flowering time July to October
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Description

From summer to autumn Rudbeckia 'Autumn Colours' offers very large flowers resembling daisies that are 12 cm wide, blooming around a brown center, in a symphony of autumn colours. They display a palette of red-bronze, coppery orange, yellow, and chocolate shades, carried on compact plants that are as beautiful in pots as in flowerbeds. Easy to grow, this short-lived perennial is cultivated as an annual and quickly forms a dense and floriferous plant that self-seeds profusely. It prefers full sun and can tolerate ordinary, rather fertile, and occasionally dry soil.

The annual rudbeckia 'Autumn Colours' belongs to the family of asteraceae. It is a cultivar derived from Rudbeckia hirta, also known as Hairy Rudbeckia, a short-lived perennial species native to the United States. In nature it grows in meadows, pastures, and cultivated fields where it is considered an adventive plant. 'Autumn Colours' is a very beautiful, compact, and highly colourful cultivar. It is an herbaceous plant that develops mostly unbranched erect stems covered with large, stiff hairs, slightly rough to the touch. Reaching 50 cm (19.7 in) in height when flowering, with a spread of 30 cm (11.8 in), the plant has an upright and bushy habit. The flowers bloom from July to October. Each head consists of a central disk in the shape of a flattened, rounded cone surrounded by a collar of ligulate flowers. The collar is divided into two concentric zones of different colors, in a range of very warm shades. The lower leaves are ovate and pointed (10 cm (3.9 in) long), with toothed edges, appearing in basal tufts. The cauline leaves are smaller and sessile (without petioles) with a rounded to cordate base.

Both an architectural plant and an accent plant, Hairy Rudbeckia quickly adds structure to your flower beds and thrives in pots thanks to its compact and rounded habit, offering generous and beautiful blooms until late in the season. Its strong presence, due to the contrast of colours, asks that it be associated with lighter flowering plants such as evening primroses (Oenothera versicolor 'Sunset Boulevard'), Felicia, nemophilas, or lobelias when grown in pots; or in the company of inulas, Ammi visnaga, or ornamental carrots in a country garden. Its variegated flowers will also be enhanced by the graphic look of tall miscanthus grasses (Miscanthus sinensis Yaku-jima, Miscanthus sinensis Silberspinne, Miscanthus transmorrisonensis).

All Rudbeckia plants are dye plants (especially R. hirta and R. laciniata) due to the presence of flavonols in their tissues. The flowers used alone give orange-yellow colors, while the entire plant provides yellow-green shades.

Note: Please be aware that our young plants sold as mini plugs are professional products intended for experienced gardeners: upon receipt, transplant and store them under cover (veranda, greenhouse, cold frame) at a temperature above 14°C for a few weeks before being planted outside once all risk of frost has passed.

 

Rudbeckia hirta Autumn Colours in pictures

Rudbeckia hirta Autumn Colours (Flowering) Flowering
Rudbeckia hirta Autumn Colours (Plant habit) Plant habit

Flowering

Flower colour multicoloured
Flowering time July to October
Inflorescence Flower head
Flower size 12 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 50 cm
Spread at maturity 30 cm
Growth rate fast

Botanical data

Genus

Rudbeckia

Species

hirta

Cultivar

Autumn Colors

Family

Asteraceae

Other common names

Black-eyed Susan, Gloriosa Daisy, Yellow Ox-eye Daisy

Origin

Cultivar or hybrid

Product reference821542

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Planting and care

Rudbeckia hirta and its varieties are easy-to-grow plants that are preferably planted in spring. They prefer well-drained and fertile soils to support strong flowering and require a sunny site. To prolong flowering, remove faded blooms as they appear so the plant does not exhaust itself in producing seeds. In autumn, once flowering is finished, remove the leafy stems. Divide the clump every three to four years and immediately replant the divisions in another part of the garden. Rudbeckia hirta is a fairly hardy plant, tolerant of temperatures down to approximately -15°C when planted in well-drained soil.

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Planting period

Best planting time March to April
Recommended planting time March to May

Intended location

Suitable for Meadow
Type of use Border, Container
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Beginner
Planting density 3 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, fertile, light, well-drained

Care

Pruning instructions Prune faded flowers regularly to prevent the plant from exhausting itself in producing seeds.
Pruning Pruning recommended once a year
Pruning time July to September
Disease resistance Very good
Overwinter Can be left in the ground
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