Can I grow this in full sun?

It prefers partial shade, especially in warmer climates where afternoon sun can scorch the needles.

How often should I water it?

Keep the soil consistently moist, especially during the first few years after planting.

Plant guide

Eastern hemlock.

Tsuga canadensis

Pronounced SOO-guh kan-uh-DEN-sis

Also known as Black Hemlock, Canada Hemlock, Canadian Hemlock, Common Hemlock, Eastern Hemlock, Eastern Hemlock-Spruce, Hemlock, Hemlock Spruce

Tsuga canadensis — Photo by James Weaver (CC BY) via gbif

The Eastern hemlock is a graceful, long-lived conifer that thrives in cool, moist environments. It features a soft, feathery appearance that makes it a beautiful addition to larger landscapes. You will love how its delicate needles add texture to your garden.

Another photo of Eastern hemlock — Photo by Lara Gibson (CC BY) via iNaturalist

At a glance

Care level: Moderate
Plant type: Coniferous evergreen tree
Light: Partial shade to full shade
Indoor light: Bright indirect
Water: Every 7 to 14 days
Mature size: 60 to 80 feet
Growth rate: Slow
Hardiness: USDA 3 to 7
Bloom time: Mid spring

Care

Keep the soil consistently moist and protect the tree from harsh, drying winds. Watch for signs of stress like needle drop or yellowing, which often indicate improper moisture levels. It prefers cooler climates and struggles in intense summer heat.

Watering: Keep the soil evenly moist but never waterlogged.
Feeding: Apply a slow-release, acid-loving fertilizer in early spring.
Pruning: Prune in late winter or early spring to remove dead or damaged branches.
Repotting: Repot only if necessary, as these trees prefer to remain undisturbed.
Soil: Moist, well-drained, acidic soil
Soil pH: Acidic
Temperature: -35 to 30°C
Humidity: 50 to 90%
Drought tolerance: Low
Lifespan: Perennial, can live for several hundred years
Deer and rabbits: Low

Signs it needs repotting

Roots circling the bottom of the pot
Water draining through too quickly
Stunted growth despite proper care

Safety

People: The plant is not considered toxic, but the needles can be a mechanical irritant if ingested.
Children: The small cones are a potential choking hazard for small children.
Contact allergens: The needles are slightly sharp and may cause minor skin irritation upon handling.
Airborne allergens: Pollen can be a mild trigger for those with sensitive respiratory systems during the spring.
Edibility: The needles are sometimes used for tea, but ensure correct identification as some yew species are highly toxic.

How to identify it

Short, flat, dark green needles
Two white bands on needle undersides
Small, woody, pendulous cones
Drooping, graceful leading shoot
Rough, scaly, reddish brown bark

Height: 12 to 21m
Spread: 6 to 10m
Leaves: dark green, evergreen
Flowers: yellow, green, 0.5 to 1cm
Fruit: brown, Autumn

Problems to watch for

By symptom

Plant problems by symptom

Check your eastern hemlock from a photo

Pocket Botanist looks at a photo of your plant and tells you what's wrong and what to try first.

Growing it

Propagation: seed, cuttings
When to plant: spring, autumn
Overwintering: Ensure the root zone is well mulched to retain moisture and protect against deep freezes.
In containers: It is not ideal for long term container growth due to its large size, but young specimens can be kept in large pots for a few years.

Cuttings

Take semi hardwood cuttings in late summer.
Dip the base in rooting hormone.
Place in a well draining medium and keep humid until rooted.

Group with other acid loving, shade tolerant shrubs to create a cohesive woodland aesthetic.

Grows well with

Mountain Laurel · They share similar requirements for acidic soil and partial shade.
Great Rhododendron · These plants naturally grow together in cool, moist woodland settings.

Similar species

Carolina Hemlock · It is a smaller, more drought tolerant relative found in the southern Appalachians.

Science

Family: Pinaceae
Genus: Tsuga
Order: Pinales
Class: Pinopsida
Native range: Eastern North America
Conservation: The species is currently threatened by the hemlock woolly adelgid, an invasive insect causing widespread decline.

It thrives in cool, moist, acidic soils and often dominates north facing slopes and ravines.

Value to wildlife: nesting habitat, winter cover, seeds for birds
Pollinators: bees, butterflies
Uses: ornamental specimen, privacy hedge, wildlife habitat, bonsai

Through the year

JFMAMJJASOND

Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 3/9
Light: 3/9
Temperature: 3/9
Moisture: 6/9
Nutrients: 4/9

Taxonomy resolved against GBIF.

Questions people ask

Can I grow this in full sun?: It prefers partial shade, especially in warmer climates where afternoon sun can scorch the needles.
How often should I water it?: Keep the soil consistently moist, especially during the first few years after planting.

Where the name comes from

The genus name Tsuga is the Japanese name for hemlock, while the specific epithet canadensis refers to its native range in Canada.

Good to know

Hemlocks are incredibly shade tolerant and can grow in the deep forest understory for decades.
They are among the longest lived trees in the eastern United States.
The wood is relatively soft and was historically used for construction and paper pulp.

Also in

Plants for shade

Keep your eastern hemlock growing

This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.

Get the app

This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.