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Botanical name: Helianthus x laetiflorus
Other names: Perennial sunflower, Showy sunflower, Prairie sunflower, Rough-leaved sunflower, Stiff sunflower, Helianthus rigidus, Helianthus scaberrimus, Helianthus pauciflorus
Species: H. x laetiflorus - H. x laetiflorus is a tall, spreading, bushy, rhizomatous perennial with rough, upright stems bearing narrowly-ovate, toothed, dark green leaves and bright yellow flower heads from late summer to mid-autumn.
Helianthus x laetiflorus is: Deciduous
Flower: Bright-yellow in Summer; Bright-yellow in Autumn
Foliage: Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn
Habit: Bushy, Erect flower stem, Spreading, Tall
Pruning: Divide every 2-4 years to maintain vigour. Cut back after flowering.. REGISTER to read more...
Propagation methods: Division. REGISTER to read more...
Helianthus x laetiflorus (Perennial sunflower) will reach a height of 2m and a spread of 1.2m after 1-2 years.
Suggested uses: Add to salads, Architectural, Beds and borders, Containers, Cottage/Informal, Flower Arranging, Wildflower
Cultivation: Grow in moist or moist but well-drained, neutral to alkaline soil in full sun. Suited for use near water. Needs long, hot summers to flower well. May need support. Mulch annually with garden compost or well-rotted manure. Site carefully as may be invasive
Soil type: Chalky, Clay, Loamy
Soil drainage: Moist but well-drained
Soil pH: Alkaline, Neutral
Light: Full Sun
Aspect: South, East, West
Hardiness: Hardy (H4)
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