Cornus sericea 'Isanti'

RHS Plant Profile

red osier dogwood 'Isanti'

RHS / Joanna Kossak

Synonyms

Cornus stolonifera 'Isanti'

Shrubs

A multi-stemmed, fast-growing, suckering deciduous shrub which is more rounded and dense than other varieties with dark green, ovate foliage turning to red in the autumn. Bright red stems are at their brightest in the winter months. White flowers appear in the spring and summer, followed by white fruit

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

2.5-4 metres

Size

Time to Maturity: 5–10 years
Max Spread: 2.5-4 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: East–facing or North–facing or South–facing or West–facing
Exposure: Exposed or 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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Cornaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Suckering
Genus: Cornus can be deciduous shrubs or trees, or creeping, woody-based perennials, some with brightly coloured young stems. Tiny flowers are borne in dense clusters, sometimes with showy bracts. Many have fine autumn colour
Name Status: Accepted

How to Grow

Cultivation

Will grow in most soil conditions in sun or partial shade. For more information see flowering dogwood cultivation

Propagation

Propagate by hardwood cuttings, semi-ripe cuttings, or layering

Suggested planting locations and garden types

Architectural
Cottage and informal garden
Low Maintenance
Banks and slopes
Flower borders and beds

Pruning

Pruning group 7. Remove suckers if required to prevent spread

Pests

Generally pest-free but may be susceptible to horse chestnut scale

Diseases

May be susceptible to cornus anthracnose and honey fungus