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Salvia forsskaolii (Indigo woodland sage)

Beginner
skill rating
1 hour care
per year
0.9m
Max height
0.5m
Max spread
1-2 years
To maturity

Plant details

Botanical name

Salvia forsskaolii

Other names

Indigo woodland sage, Saliva forskahlei, Salvia forsskaaohlei, Salvia tachiei, Forsskal's sage

Genus

Salvia Salvia

Species

S. forsskaolii - S. forsskaolii is a bushy, clump-forming perennial with ovate or deeply lobed, toothed, bristly, mid-green leaves and, from early summer to early autumn, long spikes of violet flowers with white tubes.


Salvia forsskaolii is: Deciduous

Fragrance

Foliage is scented

Habit

Clump-forming

Flower

Violet in Summer; Violet in Autumn

Foliage

Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn

How to care

Watch out for

Specific pests

Slugs , Snails Slugs , Snails

Diseases

Generally disease free.

General care

Pruning

Remove faded flowers spikes. Pruning group 9 in spring.

Propagation methods

Division, Seed, Semi-ripe cuttings, Softwood cuttings


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Where to grow

Salvia forsskaolii (Indigo woodland sage) will reach a height of 0.9m and a spread of 0.5m after 1-2 years.

Suggested uses

Beds and borders, City, Coastal, Containers, Cottage/Informal, Wallside and trellises

Cultivation

Grow in light, moderately fertile, moist but well-drained or well-drained soil in partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade

Aspect

North, East, 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

Salvia forsskaolii

Other names

Indigo woodland sage, Saliva forskahlei, Salvia forsskaaohlei, Salvia tachiei, Forsskal's sage

Genus

Salvia Salvia

Species

S. forsskaolii - S. forsskaolii is a bushy, clump-forming perennial with ovate or deeply lobed, toothed, bristly, mid-green leaves and, from early summer to early autumn, long spikes of violet flowers with white tubes.

Foliage

Deciduous

Fragrance

Foliage is scented

Habit

Clump-forming


Colour

Flower

Violet in Summer; Violet in Autumn

Foliage

Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn


How to care

Watch out for

Specific pests

Slugs , Snails

Diseases

Generally disease free.

General care

Pruning

Remove faded flowers spikes. Pruning group 9 in spring.

Propagation methods

Division, Seed, Semi-ripe cuttings, Softwood cuttings


Monthly care advice


Where to grow

Salvia forsskaolii (Indigo woodland sage) will reach a height of 0.9m and a spread of 0.5m after 1-2 years.

Suggested uses

Beds and borders, City, Coastal, Containers, Cottage/Informal, Wallside and trellises

Cultivation

Grow in light, moderately fertile, moist but well-drained or well-drained soil in partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade

Aspect

North, East, West

Exposure

Sheltered

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

Hardy (H4)

USDA zones

Zone 10, Zone 9, Zone 8, Zone 7, Zone 6

Defra's Risk register #1

Plant name

Salvia forsskaolii (Indigo woodland sage)

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa subsp. multiplex

Type

Bacterium

Current status in UK

Absent

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

3

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

4

General biosecurity comments

A bacterial disease with a wide host range detected in Corsica. Although EU regulated; there remains some concern about the risk of introduction. This subspecies is known to be able to thrive in cooler climates. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

Defra's Risk register #2

Plant name

Salvia forsskaolii (Indigo woodland sage)

Common pest name

Green semi-looper

Scientific pest name

Chrysodeixis eriosoma

Type

Insect

Current status in UK

Absent

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

3

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

3

General biosecurity comments

Polyphagous moth pest which is morphologically identical to a pest already established in the UK in protected environments and being controlled by IPM. Not expected to cause greater impacts than other species of Chrysodeixis in the UK.

Defra's Risk register #3

Plant name

Salvia forsskaolii (Indigo woodland sage)

Common pest name

tomato thrips

Scientific pest name

Ceratothripoides brunneus

Type

Insect

Current status in UK

Absent

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

3

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

3

General biosecurity comments

Thrips present in Africa; the Caribbean and parts of Asia; frequently intercepted in the UK. Can cause significant damage to tomatoes and other crops in countries where it is present. Europe wide PRA will consider its potential to establish and cause damage.

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/

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This plant likes... Garden match
Soil types: Chalky, Clay, Loamy, Sandy (will tolerate most soil types) Tell us...
Soil drainage: Moist but well-drained, Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade Tell us...
Aspect: North, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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