Helianthus x laetiflorus (Perennial sunflower)
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Beginner skill rating |
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1.2m max. spread |
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2m max. height |
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1-2 years to maturity |
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1 hour care per year |
Botanical name: Helianthus x laetiflorus
Other names: Perennial sunflower, Showy sunflower, Prairie sunflower, Rough-leaved sunflower, Stiff sunflower, Helianthus rigidus, Helianthus scaberrimus, Helianthus pauciflorus
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Genus: Helianthus
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
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Watch out for
Specific pests: Slugs , Snails
Specific diseases: Powdery mildew , Sclerotinia diseases
General care
Pruning: Divide every 2-4 years to maintain vigour. Cut back after flowering.. REGISTER to read more...
Propagation methods: Division. REGISTER to read more...
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Helianthus x laetiflorus (Perennial sunflower) will reach a height of 2m and a spread of 1.2m after 1-2 years.
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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
| This plant likes... | Garden match | |
| Soil types: | Chalky, Clay, Loamy |  |
| Soil drainage: | Moist but well-drained | |
| Soil pH: | Alkaline, Neutral | |
| Light: | Full Sun | |
| Aspect: | South, East, West | |
| Exposure: | Sheltered | |
| Hardiness: | Hardy (H4) | |
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Helianthus - how to stop the droop!
Question from
Wanted to bring some sunshine into the house this weekend so decided to cut a few stems but the flowers drooped almost immediately :( Anybody got any tips for keeping the blooms fresh and alert aside from putting them in water? Thanks.
- Views: 245
- Replies: 1
- Posted: Mon. 15th October 2012 07:13
- Last reply: Mon. 15th October 2012 15:04
"I am impressed with Shoot. Thank you!"
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