White flowers of Cornus 'Venus'

How to grow cornus

In this detailed Grow Guide, we have all you need to know about growing cornus, or dogwoods.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Plant
Plant

Do Plant in January

Do Plant in February

Do Plant in March

Do Plant in April

Do not Plant in May

Do not Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do Plant in October

Do Plant in November

Do Plant in December

Flowers
Flowers

Plant does flower in January

Plant does flower in February

Plant does not flower in March

Plant does flower in April

Plant does flower in May

Plant does flower in June

Plant does not flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Prune
Prune

Do not Prune in January

Do not Prune in February

Do Prune in March

Do not Prune in April

Do not Prune in May

Do not Prune in June

Do not Prune in July

Do not Prune in August

Do not Prune in September

Do not Prune in October

Do not Prune in November

Do not Prune in December

The genus Cornus includes a wonderful array of trees and shrubs. Some have winter flowers, others offer stunning bracts in late spring, colourful winter stems, striking autumn foliage or berries.

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The trees in the group are perfect specimens for a small garden. In almost every month of the year there is interest from one cornus or another.

Cornus have the common name of dogwood. It’s thought that this name has derived from the old English word ‘dagwood’. It’s possible that the hardwood of these trees was used to make ‘dags’ – arrows. It is also thought that the bark was used to wash dogs – take your pick!

Discover our full advice on growing cornus in our handy grow guide.

The genus Cornus includes a wonderful array of trees and shrubs.

Pink-tipped yellow stems of Cornus sanguinea in a winter border
Pink-tipped yellow stems of Cornus sanguinea in a winter border

Where to plant cornus

With such a wide range in the genus, the requirements for each can be slightly different. As a general rule, those grown for their winter stems enjoy a damp soil. They’re ideal for growing at the edge of a pond. Full sun is preferred as this leads to brighter winter stems.

Cornus mas, grown for its winter flowers, prefers a neutral to acid soil in a position of full sun. A sheltered spot is preferable. Another cornus that enjoys an acid soil is the low-growing Cornus canadensis (creeping dogwood).

The tree forms, that include Cornus kousa and Cornus controversa, can cope with a clay soil but some aren’t successful on a shallow chalky soil.

Planting a cornus
Planting a cornus

How to plant dogwood

Improve the soil before planting. Dig in some well-rotted organic matter. When planting trees use a tree stake in order to offer support in the early years. Wrap the bottom of the trunk with a tree guard to protect the trunk from rabbits. Water plants well.

Planting a row of hardwood cornus cuttings
Planting a row of hardwood cornus cuttings

Propagation of cornus

Cornus sanguinea, Cornus stolonifera, Cornus alba and Cornus sibirica strike well from hardwood cuttings taken in winter. Wait until all the leaves have fallen and then with a sharp and clean pair of secateurs remove a stem of pencil thickness. Cut the stem into lengths 15cm long. Make sure you know which is the bottom of each cutting. An easy way to avoid mistakes is to cut just above a bud at the top of the cutting at an angle.

Insert the cuttings into some worked garden soil so that half of the cutting is above the ground. Firm in and forget about them. Hopefully in spring cuttings will have taken and you can pot them on.

Cornus 'Midwinter Fire'
Cornus ‘Midwinter Fire’

Dogwood: problem solving

Cornus are generally trouble free. If cornus grown for their winter stems are offering a disappointing colour it’s likely due to one of two reasons.

Cornus need plenty of winter sun in order to encourage bright stems. Crowd your plants with too many sun-blocking evergreens and the colour can be poor. It’s also vital to cut back stems hard in March in order to encourage fresh new growth. It’s the new stems that offer the best colour.

Cutting back cornus
Cutting back cornus

How to look after cornus

Tree forms don’t require any pruning apart from the removal of lower branches to create a clear trunk.

Cornus sanguinea, Cornus alba, Cornus stolonifera and Cornus sibirica must be cut hard back in March to encourage colourful stems.

Cornus for autumn colour

Combine the bright stems of Cornus with darker foliage as a backdrop for a striking display as here with a Carex

Cornus and carex
Cornus controversa 'Variegata'
Cornus controversa ‘Variegata’

Cornus varieties to try

  • Cornus kousa ‘Eddie’s White Wonder’ – an impressive upright deciduous small multi-stemmed tree or shrub. Giant white bracts in spring followed by autumn colour. Avoid planting on shallow chalk. Reaches 6m
  • Cornus kousa ‘China Girl’ – white bracts in June followed by strawberry like fruits after a hot summer. A small hardy tree or shrub reaching 6m
  • Cornus mas – a valuable winter-flowering hardy shrub. Offers tiny scented yellow flowers on bare stems in January and February. Height 3m
  • Cornus sanguinea ‘Midwinter Fire’ – a hardy shrub grown primarily for it bright orange/red winter stems. Small white flowers in May. Ideal for a damp soil. Reaches a height of 1m
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