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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 rosemary grevillea
Synonyms Grevillea rosmarinifolia 'Williamsi' Grevillea 'Williamsii'
Family Proteaceae
Genus Grevillea can be evergreen shrubs or trees, with alternate, simple or pinnately divided leaves and petal-less flowers consisting of a colourful calyx tube with protruding style, borne in racemes or panicles
Details G. rosmarinifolia is an evergreen shrub of loose, spreading, graceful habit, to 2m in mild districts, maybe only to 1m in British gardens. Leaves are rosemary-like, rigid, linear, dark green, to 5cm long and often have prickly tips. Flowers are typically deep rose-red, borne in dense terminal clusters from late winter through to late summer
Plant range SE Australia
Foliage Evergreen
Habit Bushy
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H4
Full Sun
Aspect West-facing or East-facing or South-facing
Exposure Sheltered
Loam
Sand
MoistureWell-drained
SoilLoam, Sand
pHAcid, Neutral
Ultimate height 1.5-2.5 metres
Ultimate spread 2.5-4 metres
Time to ultimate height 10-20 years
Cultivation Grow outdoors in acid to neutral well-drained soil. Grow under glass in lime-free compost with added grit in fill light. May need restrictive pruning under glass
Propagation Propagate by seed, semi-hardwood cuttings or graft
Suggested planting locations and garden types Flower borders and beds Wall-side Borders City & Courtyard Gardens Coastal Mediterranean Climate Plants
Pruning Pruning group 1 outdoors, but more rigorous pruning may be necessary indoors to restrict size
Pests Generally pest free
Diseases Generally disease free
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