Dogwoods are small trees, so a container is possible, but it is not their natural home. Flowering dogwood is a shallow-rooted understory tree that likes cool, moist, acid soil, and a pot heats up, dries out and freezes faster than the ground. Grown carefully, a dogwood can do well in a large container on a patio for several years. The two things that decide success are steady water and winter root protection.

Table of Contents

The short answer: choose a compact dogwood, use a large pot with drainage holes and an acidic, well-drained potting mix, and give it morning sun with afternoon shade. Check the mix daily in warm weather and water when the top inch or two is dry, as The Morton Arboretum advises for containers. In winter, protect the roots: Iowa State recommends burying the pot in the ground before the soil freezes or storing it somewhere that stays between 20 and 45°F. Plan to plant the tree in the ground eventually.

Which dogwood to choose

Dogwood	Size in the ground	Notes for containers
Flowering dogwood (Cornus florida)	15 to 20 feet in sun, up to 40 feet in shade (Clemson)	Prefers afternoon shade; shallow roots dry out fast; zones 5 to 9
Kousa dogwood (C. kousa)	15 to 30 feet (Clemson); 20 to 30 feet (Morton)	Slow growing; more sun tolerant; zones 4 to 8 (Morton)
Cornelian cherry (C. mas)	20 to 25 feet tall (Clemson)	Clemson lists it as usable in containers; generally pest-free
Weeping kousa ‘Lustgarden Weeping’	About 8 feet tall, 15 feet wide (NC State)	A smaller kousa form

Both Morton and NC State describe kousa dogwood as slow growing, which helps in a pot. Clemson notes kousa is more tolerant of afternoon sun than flowering dogwood and more resistant to several diseases. For full-size expectations, see how big flowering dogwoods get.

Pot and potting mix

Go big, and make sure it drains. A larger volume of mix holds more water and buffers temperature swings. Drainage holes are essential, because Clemson says dogwoods do not tolerate extremely wet soils and are prone to root rot in poorly drained conditions.
Use an acidic, organic mix. Clemson says dogwoods prefer moist, well-drained, acidic soil (pH 5.5 to 6.0) high in organic matter. Clemson suggests compost or ground composted pine bark as organic matter for dogwood plantings, and the same materials work in a potting mix.
Plant at the same depth the tree grew in its nursery pot.

Light

Clemson says flowering dogwood prefers partial shade, especially in the hot afternoon, and that trees in sun produce more flowers but need more water. A container in full afternoon sun heats up quickly, so a spot with morning sun and afternoon shade is a good compromise. Kousa can take more sun.

Watering: the biggest job

The Morton Arboretum says container plants dry out and wilt easily because there is little soil to hold water, and that pots in full sun need water more often than pots in shade. It recommends checking containers daily and watering when the top inch or two of mix is dry.

Clemson stresses that flowering dogwood is shallow-rooted and among the first trees to suffer in drought, so do not let a potted dogwood dry out completely. Water thoroughly each time, until water runs from the drainage holes.

A layer of mulch on top of the mix helps hold moisture; Clemson recommends pine straw, compost or ground bark for dogwoods, kept off the trunk.

Feeding

Potted trees use up the nutrients in their mix. Clemson suggests feeding dogwoods lightly in spring after frost with a balanced, slow-release, acid-forming fertilizer such as an azalea product, and avoiding fertilizer for drought-stressed trees in summer. Follow the label for container rates. See do dogwoods need fertilizer for more.

Winter: protect the roots

This is where most potted trees are lost. Iowa State University Extension explains that the roots of most trees and shrubs are far less cold-hardy than their stems and trunks, so a container left above ground in winter can be damaged or killed. The University of Illinois Extension adds that the potting mix in a pot gets much colder than soil in the ground.

Your options:

Choose a tough type. Illinois Extension’s rule of thumb is to pick plants hardy to two zones colder than yours if they will overwinter outdoors in a pot. By that rule, kousa dogwood (hardy to zone 4) suits a pot left outside in zone 6, and flowering dogwood (zone 5) suits zone 7 or warmer.
Bury the pot. Iowa State says one of the most reliable methods is to dig a hole and set the pot in the ground after the plant goes dormant but before the soil freezes. Illinois adds that clustered pots can be mulched heavily with straw, leaves or wood mulch.
Move it to a cold shelter. Both sources say an unheated garage or shed can work if it stays between 20 and 45°F.
Keep it watered. Illinois notes roots keep taking up water in winter, and moist mix freezes more slowly than dry mix. Check pots through the winter.

Planting out

A dogwood will eventually outgrow any pot. Clemson recommends fall as the best time to plant dogwoods, in moist, well-drained, acidic soil with a wide mulch ring at least 8 to 10 feet across on a mature tree. Plant in partial shade for flowering dogwood. If you would rather grow new trees, see how to propagate a dogwood.

Key takeaways

Pick a compact or slow-growing dogwood; kousa and Cornelian cherry are good container candidates.
Use a large, well-drained pot and an acidic, organic potting mix.
Give morning sun and afternoon shade, and check water daily in warm weather.
Protect roots in winter by burying the pot, storing it at 20 to 45°F or choosing a type hardy to two zones colder.
Plan to plant the tree in the ground, ideally in fall.

Sources

Dogwood (HGIC 1010), Clemson Cooperative Extension
Kousa Dogwood, The Morton Arboretum
Cornus kousa, North Carolina Extension Gardener Plant Toolbox
Watering Trees and Shrubs, The Morton Arboretum
Overwintering potted plants, University of Illinois Extension
How can I over-winter container grown trees and shrubs?, Iowa State University Extension

Top photo: Photo by David J. Stang, CC BY-SA 4.0, via Wikimedia Commons

How to Grow a Dogwood Tree in a Container