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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 cockscomb 'Century Rose'
Family Amaranthaceae
Genus Celosia can be annuals, perennials or shrubs, with simple or lobed, alternate leaves and tiny, brightly coloured flowers in large, plume-like inflorescences. Many garden selections are closely related to C. argentea
Details 'Century Rose' is a bushy plant with plume-like inflorescences to 60cm on pale pink stems. Foliage is bright green andpink-flushed. Long lasting colour
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
H2
Full Sun
Aspect South-facing or West-facing
Exposure Sheltered
Chalk
Loam
Sand
MoistureMoist but well-drained, Well-drained
SoilChalk, Loam, Sand
pHAcid, Alkaline, Neutral
Ultimate height 0.5-1 metres
Ultimate spread 0.1-0.5 metres
Time to ultimate height 1 year
Cultivation Annual that can be grown outside once frosts have passed. Grow in loam-based potting compost (JI No 1) in full light with good ventilation. Moist but well-drained fertile soil in full sun in a sheltered position. Apply a balanced liquid fertiliser every 2 weeks
Propagation Propagate by seed
Suggested planting locations and garden types Flower borders and beds Cut Flowers Patio & Container Plants Cottage & Informal Garden
Pruning No pruning necessary
Pests Glasshouse red spider mite, glasshouse whitefly and aphids may be a problem under glass
Diseases Foot and root rot and fungal leaf spot diseases may occur
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