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AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
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Other common names giant inula
Family Asteraceae
Genus Inula may be annuals, herbaceous perennials or sub-shrubs, moslty with large basal leaves and daisy-like yellow flower-heads, often with narrow ray-florets
Details I. magnifica is an upright perennial to 2m tall, with branching purplish stems bearing hairy ovate leaves to 25cm long, and several deep yellow flower heads to 15cm wide in early summer
Plant range Caucasus
Foliage Deciduous
Habit Bushy
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H6
Full Sun
Aspect West-facing or South-facing
Exposure Sheltered
Loam
MoistureMoist but well-drained, Poorly-drained
SoilLoam
pHAcid, Alkaline, Neutral
Ultimate height 1.5-2.5 metres
Ultimate spread 0.5-1 metres
Time to ultimate height 2-5 years
Cultivation Grow in a deep, fertile, moist but well-drained soil in full sun. Will also tolerate boggy conditions
Propagation Propagate by seed in spring, or as soon as ripe in autumn, and sow into containers in a cold frame. Propagate by division in spring or autumn
Suggested planting locations and garden types Flower borders and beds Wildlife Gardens Wildflower meadow Cottage & Informal Garden
Pruning Cut back old stems and foliage as the plant dies back for the winter
Pests Generally trouble free
Diseases Powdery mildews may be a problem in conditions that are too dry
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