Helianthus annuus 'Green Heart' — Bushy, Clump forming

Overview

Helianthus annuus 'Green Heart' is a bushy, clump forming annual biennial in the genus Helianthus, part of the Asteraceae family, with deciduous foliage. Helianthus annuus 'Green Heart' grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H2. Suggested uses include city and courtyard gardens, wildlife gardens, cottage and informal garden and patio and container plants.

About

Helianthus annuus 'Green Heart' is a bushy, clump-forming annual or biennial cultivar of the Helianthus genus, known for upright plants with broad, simple leaves and large daisy-like flower heads. This deciduous cultivar thrives in full sun with a south- or west-facing, sheltered aspect and prefers moist but well-drained soil types including chalk, loam, and sand across a range of pH levels. Suitable for city and courtyard gardens, wildlife areas, cottage and informal gardens, as well as patios and containers, it is hardy to UK zone H2 and is best propagated by seed or division.

Growing conditions

Best soil and position for Helianthus

Sunlight: Full sun
Soil type: Chalk, Loam, Sand
Soil pH: Acid, Alkaline, Neutral
Soil moisture: Moist but well-drained
Aspect: South-facing, West-facing
Exposure: Sheltered
UK hardiness: H2

Plant details

Helianthus annuus 'Green Heart' size, habit and characteristics

Plant type: Annual Biennial
Habit: Bushy, Clump forming
Foliage: Deciduous
Suggested uses: City and courtyard gardens, Wildlife gardens, Cottage and informal garden, Patio and container plants

Care notes

Pruning and caring for Helianthus annuus 'Green Heart'

Propagation: Propagate by seed or division. Divide established clumps every 2-4 years to both increase plants and retain vigour. See sowing seeds indoors for further advice
Pest resistance: May be susceptible to slugs and snails
Disease resistance: May be susceptible to powdery mildews and sclerotinia diseases

Frequently asked questions

Where is the best place to plant Helianthus annuus 'Green Heart'?

Helianthus annuus 'Green Heart' prefers full sun. It suits sheltered positions.

What soil does Helianthus annuus 'Green Heart' need?

Helianthus annuus 'Green Heart' is adaptable and grows happily in most soil types, including chalk, loam and sand. It is happy in soil of any pH. Aim for soil that stays moist but well-drained.

Is Helianthus annuus 'Green Heart' hardy in the UK?

Helianthus annuus 'Green Heart' has an RHS hardiness rating of H2, meaning it is tender, tolerating 1–5°C, and needs frost-free protection over winter.

How do I propagate Helianthus annuus 'Green Heart'?

Propagate by seed or division. Divide established clumps every 2-4 years to both increase plants and retain vigour. See sowing seeds indoors for further advice.

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