Asimina triloba 'Sunflowers' (F)

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A slow growing large shrub/small tree that is deciduous, with leaves turning yellow in autumn. Maroon, cup shaped flowers up to 5cm across are produced in late spring, followed by edible oval fruits. It is self-fertile, producing fruit in early autumn that has sweet flesh and few seeds

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

4-8 metres

Size

Time to Maturity
20–50 years
Max Spread
4-8 metres
Max Height
4-8 metres

Growing Conditions

Clay Loam Sand
Moisture
Moist but well–drained
pH
Neutral or Acid or Alkaline

Position

Full sun Partial shade
Aspect
South–facing or East–facing or West–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Annonaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Asimina are deciduous or evergreen shrubs or small trees, with broad or narrow, oval leaves. The purplish flowers are followed by sweet, pulpy, greenish or yellow fruits
Name Status
Unresolved
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea

This genus produces fruit, but not necessarily edible fruit

How to Grow

Cultivation

Will grow well in partial shade, particularly when young, but requires a sunny position and long, hot summers to fruit well. Can be grown in a container. Requires moist but well-drained soil

Propagation

Propagate by layering in spring or autumn

Suggested planting locations and garden types

  • City and courtyard gardens
  • Edible fruit
  • Wall side borders
  • Flower borders and beds

Pruning

Pruning group 1. Slow growing, usually no need for pruning

Pests

Generally pest-free

Diseases

Generally disease-free