White Fir (Concolor Fir)
A Stately Blue-Green Fir That Takes the Heat
White Fir (Abies concolor), also called Concolor Fir, is the most adaptable fir for Minnesota landscapes - more tolerant of heat, drought, and city conditions than balsam. It forms a handsome, broad pyramid 40-60 feet tall, with soft, long blue-green needles that give it a look similar to Colorado spruce but far softer to the touch. An excellent, long-lived specimen or screen.
White Fir Plant Details
| Attribute | Detail |
|---|---|
| Scientific Name | Abies concolor |
| Common Names | White Fir, Concolor Fir |
| Mature Height | 40-60 feet |
| Mature Width | 15-25 feet |
| Growth Rate | Moderate - 12-18 inches per year |
| Sun | Full sun (6+ hours) |
| Water | Moderate; more drought-tolerant than other firs once established. |
| USDA Zones | 3-7 (Twin Cities is zone 4b-5a) |
| Soil | Adaptable; tolerates Minnesota clay-loam. |
| Foliage | Evergreen - soft, long blue-green to silvery needles |
| Winter Hardiness | Reliable to -40F. |
| Deer Resistance | Good - deer generally avoid firs, browsing them far less than arborvitae or yew. |
| Native Status | Not native; a western North American species well adapted to the Midwest |
White Fir Uses in Minnesota Landscapes
Stately Blue-Green Specimen and Shade Tree
White Fir grows into a large, stately pyramid of soft blue-green to silvery needles - a refined specimen that becomes a true shade tree with age. As a 40-60 foot tree it anchors a larger Twin Cities yard in Wayzata or Eden Prairie, bringing soft color and a clean, classic conifer form to the landscape.
Tough Screen and Windbreak
Dense and adaptable, it makes an excellent tall screen or windbreak on larger or exposed metro properties. Space the trees 12-15 feet apart in a row for privacy and wind protection, with soft blue-green color that outclasses a plain spruce screen.
The Most Adaptable, Deer-Resistant Fir
White fir is the toughest of the firs - it takes heat, drought, clay, and tougher urban conditions far better than its cousins once established, while still handling -40F Minnesota winters. Its needles are soft to the touch, and because deer browse firs far less than arborvitae or yew, it stays handsome even in high-pressure suburbs like Minnetonka and Eden Prairie.
Best Time to Plant White Fir in Minnesota
As an evergreen, White Fir establishes best when planted in late summer to early fall - late August through mid September is the ideal Twin Cities window, giving roots time to settle before the ground freezes and reducing winter desiccation. Spring (late April through May, after the ground thaws) is the strong second choice. Avoid midsummer planting, and never plant after mid-October or before the ground thaws.
How to Plant White Fir
- Dig the hole two to three times as wide as the root ball but no deeper - in heavy clay, go wider still and set the top of the root ball slightly above grade.
- Check for clay hardpan: if water pools in the bottom of the hole, break through the compacted layer or mound-plant. White fir wants well-drained soil and dislikes wet feet.
- Backfill with the native soil mixed with 20-30% compost; avoid creating a pure-compost pocket that traps water around the roots.
- Give a specimen plenty of room for its mature spread - 15-20 feet from buildings - or space windbreak trees 12-15 feet apart in a row.
- Build a 3-4 inch watering basin around the root zone, then flatten it before winter to prevent ice damage.
- Mulch with 2-3 inches of shredded bark or wood chips, kept a couple of inches back from the trunk. Do not use gravel mulch - it offers no winter insulation in Minnesota.
Watering White Fir in Minnesota
First Year Watering Schedule
- Weeks 1-2: water deeply every 1-2 days, soaking the root ball slowly.
- Month 1-2: water every 3-4 days.
- Month 3 onward: water every 5-7 days through the growing season, easing off when rainfall is adequate.
- Stop watering 2-3 weeks before the ground freezes (late October in the metro). A single deep soak in early December helps if fall was dry, since evergreens lose moisture all winter.
After Year One
- Established trees are the most drought-tolerant of the firs and need supplemental water only during extended dry spells.
- Water deeply and infrequently, soaking to 6-8 inches, and let natural rainfall do most of the work.
Will White Fir survive a Minnesota winter?
Easily. It is hardy to roughly -40F (USDA zone 3), well beyond the Twin Cities metro range of zone 4b-5a, and it is one of the most adaptable, cold-hardy conifers you can plant.
How big does it get?
It matures to about 40-60 feet tall and 15-25 feet wide - a full specimen and shade tree, so give it plenty of room rather than crowding it near the house or other large trees.
How does White Fir compare to other firs and spruces?
White fir is the toughest, most heat- and drought-tolerant fir, and unlike a prickly spruce its needles are long and soft. The named selections (Candicans, Blue Select) push the blue color further, but the straight species is the most adaptable and the most affordable way to plant one.
Is White Fir deer-resistant?
Yes - more so than many conifers. Deer generally avoid firs, browsing them far less than arborvitae or yew, which makes it a reliable choice in high-pressure western suburbs like Minnetonka, Wayzata, and Eden Prairie.
You May Also Like
- Candicans White Fir - a selection of white fir bred for intense silver-blue color.
- Blue Select White Fir - a large, richly blue white fir for specimens and screens.
- Blue Cloak White Fir - a narrow, weeping silver-blue white fir for a graceful cascading form.
- Conica Dwarf White Fir - the same soft blue-green needles in a compact dwarf cone for small spaces.
How Many White Fir Do I Need?
For a privacy screen or windbreak row, space White Fir 12–15 feet on center:
| Screen Length | Plants Needed (12–15 ft spacing) |
|---|---|
| 25 feet | 2–3 trees |
| 50 feet | 4–5 trees |
| 75 feet | 5–7 trees |
| 100 feet | 7–9 trees |
For a single specimen, allow the full 15–25 foot mature spread — plant at least 15–20 feet from the house and other large trees so the pyramid develops evenly to the ground.
White Fir Season-by-Season in Minnesota
- Spring: Soft, silvery new needles flush at the branch tips in May — the brightest the tree looks all year, with a citrusy scent when brushed.
- Summer: The long blue-green needles stay cool-toned through heat and dry spells that stress balsam fir; the pyramid adds 12–18 inches.
- Fall: Color holds steady silver-blue against blazing maples and oaks; upright barrel-shaped cones may stand on the top branches of mature trees.
- Winter: A full, soft-needled pyramid that takes -40°F without flinching — frost and snow on the silvery needles make it the showpiece of the dormant yard.
At a Glance
✔ Deer-Resistant ✔ Drought-Tolerant ✔ Evergreen ✔ Four-Season Interest
Plant It With
- Candicans White Fir — the most intensely silver-blue selection, stunning beside the softer species color.
- Blue Select White Fir — a richly blue large fir to mix into a screen row for color variation.
- Blue Cloak White Fir — a narrow weeping silver-blue form for a sculptural accent nearby.
- Conica Dwarf White Fir — the same soft needles in a compact cone for the front of the bed.
Is White Fir Right for Your Yard?
Choose it if you have a sunny, well-drained spot with room for a 40–60 foot tree — it's the toughest fir for Twin Cities conditions, handling heat, drought, clay, and deer pressure better than balsam while keeping soft, friendly needles. It's not a fit for small lots or soggy ground: this is a full-size tree that resents wet feet, so skip it where space is tight or water stands after rain.