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Summary

Helianthus × doronicoides Lam. is an accepted natural hybrid of Helianthus giganteus and H. mollis.

Physical Characteristics

Helianthus_doronicoides is a PERENNIAL growing to 1.8 m (6ft) by 0.6 m (2ft in).
See above for USDA hardiness. It is hardy to UK zone 4. It is in flower from September to October, and the seeds ripen from October to November. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

Helianthus × doronicoides

Plant Habitats

Edible Uses

Tubers - cooked[2, 46, 61]. A similar taste to Jerusalem artichokes but less productive because the tubers are very thin[K].

References More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

None known

References More on Medicinal Uses

Other Uses

None known

Special Uses

References More on Other Uses

Cultivation details

Succeeds in most soils in a sunny position[1]. Requires a rich soil[1]. Dislikes shade[1]. Plants have a running root system and can be invasive in suitable conditions[233]. The young growth is extremely attractive to slugs, plants can be totally destroyed by them[K]. Members of this genus are rarely if ever troubled by browsing deer or rabbits[233]. Possibly a naturally occurring hybrid, H. giganteus x H. mollis[200]. Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

References Carbon Farming Information and Carbon Sequestration Information

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Plant Propagation

Seed - sow spring in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Division in spring or autumn. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring. Basal cuttings in spring. Harvest the shoots when they are about 10 - 15cm long with plenty of underground stem. Pot them up into individual pots and keep them in light shade in a cold frame or greenhouse until they are rooting well. Plant them out in the summer.

Other Names

If available other names are mentioned here

Helianthus ×doronicoides. Helianthus × doronicoides. Giant sunflower.

Native Range

NORTHERN AMERICA: United States Arkansas, Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Missouri, New Jersey, New York, Ohio, Oklahoma, Texas, Virginia.

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it's worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status : Not listed.

IUCN Red List

Related Plants

Latin Name	Common Name	Habit	Height	Hardiness	Growth	Soil	Shade	Moisture	Edible	Medicinal	Other
Helianthus doronicoides	Sunflower	Perennial	1.8	4-8		LMH	N	M	2	0	0

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

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Helianthus_doronicoides - Lam.