Cucurbita moschata 'Avalon'

RHS Plant Profile
squash (butternut) 'Avalon'

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Annual Biennial

A winter squash, producing cylindrical fruits with a bulbous end furthest from the stalk. These are produced on trailing vines in excess of 1.8m (6ft) long. The smooth, pale orange, hard-skinned fruits, 12.5cm (5in) in diameter and 27.5cm (11in) in length, can be ready to harvest from late summer into autumn. They store well once ripe and have sweet, bright orange flesh with a nutty taste. They can reach around 2.3kg (approximately 5lbs) in weight.

Position

Full sun

Soil Types

Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
1 year
Max Spread
1.5-2.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun
Aspect
South–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)
H2

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Cucurbitaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Trailing
Potentially harmful
Humans/Pets: If crop is bitter, don't eat or feed to pets. Wear gloves and other protective equipment when handling
Genus
A small genus of climbing or trailing, annual herbaceous fruits. Several edible species are cultivated for food and other uses. Native to Central and South America. Solitary, star-shaped flowers are usually golden-yellow. Leaves are palmately lobed, covered with tiny, prickly hairs
Name Status
Unresolved

How to Grow

Cultivation

Grow in fertile, moisture retentive but well drained, acidic to neutral soil in full sun. Sow indoors March to May in good quality seed compost. Sow the seeds on their side 1cm deep and maintain a constant temperature of 18-21C. Feed regularly with a high potassium fertiliser when the first fruits start to swell. See cucurbit cultivation

Propagation

Propagate by seed. See sowing vegetable seeds

Suggested planting locations and garden types

  • Patio and container plants

Pruning

No pruning required

Pests

Generally pest-free

Diseases

May be susceptible to grey moulds and powdery mildews