OK
In progress indicator

Prunus domestica 'Imperial Gage' (Plum 'Imperial Gage')

Beginner
skill rating
1 hour care
per year
4m
Max height
4m
Max spread
5-10 years
To maturity

Plant details

Botanical name

Prunus domestica 'Imperial Gage'

Other names

Plum 'Imperial Gage', Prunus domestica 'Denniston's Superb', Greengage 'Imperial Gage'

Genus

Prunus Prunus

Variety or Cultivar

'Imperial Gage' _ 'Imperial Gage' is an upright, rounded, deciduous fruit tree with ovate to elliptic, toothed, mid-green leaves and white flowers in spring followed by reliable crops of oval to round, yellow-green fruit with yellow flesh, ready for harvest in late summer.


Prunus domestica 'Imperial Gage' is: Deciduous

Habit

Rounded, Upright

Awards

RHS AGM (Award of Garden Merit)

Flower

White in Spring

Foliage

Green in Spring; Green in Summer

How to care

Watch out for

Specific pests

Aphids , Brown scale , Bullfinches , Caterpillars , Fruit tree red spider mite , Leaf mining moths , Plum leaf-curling aphid Aphids , Brown scale , Bullfinches , Caterpillars , Fruit tree red spider mite , Leaf mining moths , Plum leaf-curling aphid

Silver leaf Silver leaf

General care

Pruning

Thin fruit as needed. Regular pruning required according to tree form. Prune in summer in areas where silver leaf disease is prevalent.

Propagation

A self-fertile variety, it does not need to be planted with another plum to produce reliable crops.

Propagation methods

Softwood cuttings, Budding, Grafting


Sign up for your FREE ACCOUNT today or login to receive detailed monthly care instructions

Where to grow

Prunus domestica 'Imperial Gage' (Plum 'Imperial Gage') will reach a height of 4m and a spread of 4m after 5-10 years.

Suggested uses

Cottage/Informal, Flavouring food and drinks, Specimen tree, Wallside and trellises

Cultivation

Grown in moist but well-drained, neutral soil in full sun. Irrigate in dry periods. Rootstock determines final height. Self-fertile - no pollinator required.

Soil type

Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Neutral

Light

Full Sun

Aspect

South, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Prunus domestica 'Imperial Gage'

Other names

Plum 'Imperial Gage', Prunus domestica 'Denniston's Superb', Greengage 'Imperial Gage'

Genus

Prunus Prunus

Variety or Cultivar

'Imperial Gage' _ 'Imperial Gage' is an upright, rounded, deciduous fruit tree with ovate to elliptic, toothed, mid-green leaves and white flowers in spring followed by reliable crops of oval to round, yellow-green fruit with yellow flesh, ready for harvest in late summer.

Foliage

Deciduous

Habit

Rounded, Upright

Awards

RHS AGM (Award of Garden Merit)


Colour

Flower

White in Spring

Foliage

Green in Spring; Green in Summer


How to care

Watch out for

Specific pests

Aphids , Brown scale , Bullfinches , Caterpillars , Fruit tree red spider mite , Leaf mining moths , Plum leaf-curling aphid

Specific diseases

Silver leaf

General care

Pruning

Thin fruit as needed. Regular pruning required according to tree form. Prune in summer in areas where silver leaf disease is prevalent.

Propagation

A self-fertile variety, it does not need to be planted with another plum to produce reliable crops.

Propagation methods

Softwood cuttings, Budding, Grafting


Monthly care advice


Where to grow

Prunus domestica 'Imperial Gage' (Plum 'Imperial Gage') will reach a height of 4m and a spread of 4m after 5-10 years.

Suggested uses

Cottage/Informal, Flavouring food and drinks, Specimen tree, Wallside and trellises

Cultivation

Grown in moist but well-drained, neutral soil in full sun. Irrigate in dry periods. Rootstock determines final height. Self-fertile - no pollinator required.

Soil type

Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Neutral

Light

Full Sun

Aspect

South, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 8, Zone 7, Zone 6

Defra's Risk register #1

Plant name

Prunus domestica 'Imperial Gage' (Plum 'Imperial Gage')

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Prunus domestica 'Imperial Gage' (Plum 'Imperial Gage')

Common pest name

Chlorotic leafroll of apricot; Chlorotic leafroll of nectarine; Chlorotic leafroll of peach; Decline of Japanese plum; Decline of peach; Dieback of apricot; European stone fruit yellows; European yellows of peach; Italian rosette of peach; Leptonecrosis of plum; MoliĀŠres disease of cherry; Vein clearing of peach; Vein enlargement of peach

Scientific pest name

Candidatus Phytoplasma prunorum

Type

Phytoplasma

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

5

General biosecurity comments

EU regulation appears satisfactory for UK; willing to participate in future review of EU listing.

Defra's Risk register #3

Plant name

Prunus domestica 'Imperial Gage' (Plum 'Imperial Gage')

Common pest name

Peach red-necked longhorn; Plum and peach longhorn; red-necked longhorn

Scientific pest name

Aromia bungii

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

4

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

A pest mainly of Prunus previously intercepted in the UK on wooden packaging imported from China. There have been longstanding outbreaks of the pest in Italy; a source of significant trade in plants for instant landscapes; and also findings in Germany. The UK will press for early EU regulation and consider UK national measures if risk increases.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/

In order to add a note on this plant, please add this plant to your plant lists.

In progress indicator
Full size image
In progress indicator
Caption

Caption

Cancel and close this form
In progress indicator
This plant likes... Garden match
Soil types: Loamy, Sandy Tell us...
Soil drainage: Moist but well-drained, Well-drained Tell us...
Soil pH: Neutral Tell us...
Light: Full Sun Tell us...
Aspect: South, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

GARDENS WITH THIS PLANT

My Garden
My Garden
Shelagh McIntosh
My Garden
My Garden
Karen Clayton

Report content or feedback to Shoot

To add ? to your lists,
login to your account or subscribe.

Find out more about plant lists here

or Login


To check if this plant is suitable for your garden first login to your account or subscribe.

or Login

In progress indicator
Note

Note

You are adding a note to: ?

Cancel