Pyrus communis Invincible ('Delwinor') (D/C)

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pear [Invincible]

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Synonyms

Pyrus communis 'Delwinor'

Plants for pollinators
Fruit Edible Trees
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A medium-sized, very hardy tree which can flower twice in spring so will normally crop well even if frost damages early blossom. Fruit are broadly conical, with russet skin, and sweet, soft, juicy flesh. Pick from early autumn and store to late winter, using early fruit for cooking, later ones for desert. Partially self-fertile, pollination group 2

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
10–20 years
Max Spread
2.5-4 metres
Max Height
4-8 metres

Growing Conditions

Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline 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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Rosaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Spreading branched
Genus
Pyrus are deciduous trees or shrubs with oval leaves and scented white flowers in spring, followed by green or brown fruits, edible in some species
Name Status
Trade
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

Dessert pears are sweet and juicy and are best eaten picked fresh and raw

How to Grow

Cultivation

Needs a deep, fertile, moist but well-drained, fairly neutral soil in a sheltered, sunny position. Will not thrive on very acid soils, shallow chalk soils or with shade for more than half the day. See Pears or pear cultivation for further advice

Propagation

Propagate by chip budding in late summer, or grafting in mid-winter, onto a clonal rootstock for pears. Fruit grown from pips is unlikely to resemble the parent

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Edible fruit
  • Wall side borders

Pruning

Prune according to chosen training method. See pruning new pear trees, summer pear pruning, winter pear pruning, renovating pear trees and pruning established fans

Pests

May be susceptible to aphids, caterpillars, codling moth, pear blister mite, pear midge and pear and cherry slugworm

Diseases

May be susceptible to blossom wilt, brown rot, fireblight, pear scab, European pear rust and honey fungus (rarely)