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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 heliotrope 'Marine'
Synonyms Heliotropium 'Marine'
Family Boraginaceae
Genus Heliotropium can be annuals, perennials, sub-shrubs or shrubs, with simple leaves and large clusters of small, scented flowers in summer
Details 'Marine' is a compact cultivar, usually grown as annual bedding, growing to about 45cm tall, with scented, deep violet-blue flowers
Foliage Evergreen
Habit Bushy
Fragrance Flower
Toxicity All parts of the plant are toxic by ingestion
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1C
Full Sun
Partial Shade
Aspect West-facing or East-facing or South-facing
Exposure Sheltered
Loam
Sand
MoistureMoist but well-drained
SoilLoam, Sand
pHAcid, Alkaline, Neutral
Ultimate height 0.1-0.5 metres
Ultimate spread 0.1-0.5 metres
Time to ultimate height 2-5 years
Cultivation Under glass may be grown in a loamless or loam-based compost (JI No3) in full light but with some protection from hot sun. Outdoors grow in any moist but well-drained soil in full sun. Water moderately in the growing season and apply a balanced fertiliser once a month. In the winter keep the rootball just moist
Propagation Propagate cultivars by taking softwood cuttings or semi-ripe cuttings in summer
Suggested planting locations and garden types Flower borders and beds City & Courtyard Gardens Cottage & Informal Garden Coastal
Pruning Tip-prune shoots on young plants in early spring to promote bushy growth. Older leggy plants can gave their stems shortened by half in spring
Pests Glasshouse whitefly may be a problem if grown under glass
Diseases Generally problem free
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