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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
magnolia [Black Tulip]
Magnolia 'Black Tulip'
Magnolia can be deciduous or evergreen trees or shrubs, with large, showy, often fragrant flowers, often opening before the leaves, and sometimes followed by colourful cone-like fruit
Black Tulip is a vigorous, upright, open-branched, deciduous tree with oval leaves up to 15cm long. Before the leaves open, from early to mid-spring, it produces abundant, cup-shaped, rich red-purple flowers, 15cm or more across, with rounded petals
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or West-facing
MoistureMoist but well-drained
SoilLoam, Clay, Sand
Time to ultimate height
Grow in moist but well-drained neutral to acid soil in full sun or part shade with shelter from cold winds. Late frosts may damage flower buds and/or flowers. See magnolia cultivation
Propagate by softwood cuttings from late spring to early summer or semi-ripe cuttings from late summer to autumn
Suggested planting locations and garden types
Low Maintenance Wall-side Borders
Architectural City & Courtyard Gardens Cottage & Informal Garden
Pruning Magnolia pruning should be carried out in midsummer when in full leaf
Pests Susceptible to scale insects
Susceptible to coral spot, honey fungus and phytophthora root rot
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
magnolia [Black Tulip]
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