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Botanical species
Pinaceae
Subalpine Fir (Tsuga mertensiana)
Mountain Hemlock
Product code : GAIAND-0007
Subalpine fir is an evergreen botanical species, adapted to sun to partial shade and fresh to moist, acidic, humus-rich, well-drained soil. It reaches 20 to 40 m at maturity. Packet of approximately 10 seeds, Gaiand house brand.
- Quantity
- About 10 seeds
- Exposure
- Partial shade
- Life cycle
- Perennial tree
- Hardiness
- Zone 4 to 7
Discover the plant
Common nameSubalpine Fir
FamilyPinaceae
GenusTsuga
Speciesmertensiana
TypeBotanical species
Botanical nameMountain Hemlock
Reproducible seedsYes
Mountain Hemlock (Tsuga mertensiana) is a botanical species in the Pinaceae family. Native to western North America, it has a conical conifer shape with flexible branches and typically reaches 20 to 40 m in height, with a spread of about 6 to 10 m. Its foliage is evergreen.
Plant it in sun to partial shade in cool to moist, acidic, humus-rich, and well-drained soil. High humidity and good drainage promote consistent rooting. Its growth is slow. Final dimensions depend on climate, soil, and available space.
This species is suitable for large cool areas, woodland gardens, collections, and as a specimen tree. The dense canopy provides significant shelter in mountainous environments. When planting, plan for the space required for a large tree and protect young plants from drying winds and mechanical damage.
Sowing guide
It all startswith a seed.
Sowing depth
To be confirmed according to the batch
Spacing / density
Expect 6 to 10 m spread at maturity
Germination temperature
To be confirmed according to the batch protocol
Germination time
Variable; batch protocol to be confirmed
Sowing period
According to the batch dormancy protocol
Propagation
Sowing
Growing method
Sow in a fine, clean, well-drained medium. As Gaiand did not provide precise dormancy requirements, check the lot protocol before sowing. Maintain consistent moisture without waterlogging, place under bright light, and transplant carefully once vigorous seedlings emerge. Gradually acclimate young trees before permanent planting. Choose a site with sun to partial shade and cool to moist, acidic, humus-rich, well-drained soil. Allow space for a mature height of 20 to 40 m and a spread of 6 to 10 m. Water during the first few seasons, then adjust watering based on drainage and rainfall.
Soil and care
The right care,at the right time.
Soil pH
Acid to neutral depending on the species
Care level
Moderated during establishment
Watering
Maintain high humidity during establishment. Water deeply when the soil begins to dry, then space out waterings rather than lightly watering daily. Avoid standing water and adjust watering to rainfall, drainage, and temperature.
Soil type
Subalpine fir prefers cool to moist, acidic, humus-rich, well-drained soil. Maintain drainage, avoid compaction, and keep the root collar at ground level. A thin organic mulch helps stabilize moisture without touching the trunk directly.
Fertilization
Fertilize only if a soil analysis reveals a deficiency; avoid excess nitrogen.
Moisture
Raised
Container growing
A garden,within reach.
Recommended pot size
Deep pot suitable for a young tree; transplant before spiral rooting
Pot culture is best suited for young plants. Use a deep, well-draining container, then transplant before the roots begin to spiral.
Bloom and dimensions
Its place,in your garden.
Mature height
20 to 40 m
Width / spread
6 to 10 m
Flower color
Non-ornamental
Foliage color
Green
Foliage type
Persistent
Growth rate
Slow
Growth habit
Conical conifer with flexible branches
Bloom period
Inconspicuous flowering; species cultivated mainly for its habit and foliage.
Fruiting
Seed cones
Harvest
Collect ripe cones only from properly identified trees
Garden associations
In goodcompany.
Companion plants
Combine with trees and shrubs that have the same light, soil, and moisture requirements.
Frequently asked questions
Your questions,answered.
Where to plant Subalpine Hemlock?
Choose a site with full sun to partial shade, allowing 20 to 40 meters in height and 6 to 10 meters in spread. The recommended soil is: cool to moist, acidic, humus-rich, and well-drained.
How to sow Subalpine Fir?
Use a fine, well-draining substrate, kept moist but not saturated. The exact dormancy treatment must be confirmed according to the Gaiand batch before sowing. Carefully transplant vigorous seedlings and acclimate them before outdoor planting.
What is the growth rate of subalpine fir?
Growth is slow. The actual speed varies according to light, climate, fertility, humidity, and root space.
What are the uses for Subalpine Fir?
Subalpine fir is suitable for large, cool gardens, woodland gardens, collections, and as a specimen tree. Plan for its adult size and keep it away from structures.
Are subalpine fir seeds reproducible?
Yes. This is a botanical species and the seeds are indicated as reproducible, subject to cross-pollination with compatible taxa nearby.
Wildlife and pets
Life,around your plants.
Attracts birds
Yes
Supporting wildlife
The dense antlers provide important shelter in mountain environments.