Purpledisk sunflower (Helianthus atrorubens)

Purpledisk sunflower

Other names for purpledisk sunflower (Helianthus atrorubens) include Appalachian sunflower, wild sunflower, and dark-eyed sunflower. It’s a species that’s indigenous to the southeastern part of the United States. It is in fact a member of the sunflower family. However, unlike other species in this family, it prefers to grow by itself instead of with others.

Scientific classification

Species

Purpledisk sunflower (Helianthus atrorubens)

Asters bellflowers fanflowers and allies

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Perennial

Lifespan

Herb

Plant Type

Summer, Fall

Bloom Time

91 cm to 1.2 m

Plant Height

Deciduous

Leaf type

5 - 35 ℃

Ideal Temperature

Summer, Fall

Growth Season

Rapid

Growth Rate

Images of Purpledisk sunflower

Distribution of Purpledisk sunflower

Distribution Map

Purpledisk sunflower is native to North America, specifically found in regions with temperate climates. Over time, purpledisk sunflower has been introduced to parts of the Eastern Hemisphere, notably in Temperate Asia and Central Europe. This species is not only naturalized in these regions but is also cultivated for its ornamental value.

Native

Cultivated

Invasive

Introduced

No species reported

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Hemisphere Trend Curve

Northern

Sorthern

Cultivars

There are several recognized cultivars of Purpledisk sunflower, including the following common varieties :

Sunflowers 'Loddon Gold'Sunflowers 'Happy Days'Purpledisk sunflower 'Monarch'

Quickly Identify Purpledisk sunflower

Robust perennial reaching 3-5 feet (90-150 cm) with opposite leaves and white fuzzy hairs.

Large yellow flowers with brown disks bloom from mid-summer to late autumn.

Daisy-like flowers have yellow rays and purple-brown disks, blooming July to October.

Fruit is dry, one-seeded achene with rough texture, 0.16 inches (4 mm) long.

Stem starts hairy, transitions to smooth, reaching 2-4 feet (60-120 cm) tall.

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Care Guide for Purpledisk sunflower

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Water: Native to North American prairies, purpledisk sunflower flourishes in moderate moisture and well-draining soil. It requires weekly watering for optimal health and benefits from outdoor cultivation, aligning with seasonal rainfall to ensure adequate hydration during critical growth stages.

Fertilize: Purpledisk sunflower thrives with balanced nutrition fertilizers during spring and summer, and high phosphorus formulas pre-flowering. Apply every 4-6 weeks, ensuring proper dosage to prevent root burn. Adjust feeding in fall/winter, and water soil before and after application to enhance nutrient distribution.

Pruning: Purpledisk sunflower has striking purple-red centers and golden petals. Prune in early to late spring for healthy growth and blooms. Remove dead stems and trim healthy ones by one-third to enhance air circulation. Use sharp, sterilized tools to prevent disease spread.

Propagation: Purpledisk sunflower is propagated by sowing seeds in well-draining soil, maintaining consistent moisture. Plant seeds shallowly for light exposure necessary for germination. For best growth, use fertile substrate and ample sunlight. Care during early stages is essential for developing strong, healthy plants.

Repotting: The plant purpledisk sunflower requires excellent drainage in pots to thrive, ensuring that excess water does not accumulate and negatively affect its growth and health.

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