Pseudotsuga menziesii ‘Fastigiata’ ‘Fastigiata’ Douglas-Fir Fact Sheet ST-527 1

Fact Sheet ST-527
October 1994
Pseudotsuga menziesii ‘Fastigiata’
‘Fastigiata’ Douglas-Fir1
Edward F. Gilman and Dennis G. Watson2
INTRODUCTION
This cultivar of Douglas-Fir probably grows about
40 feet tall but spreads only about 10 or 15 feet in a
dense, narrow pyramid in the landscape (Fig. 1). This
cultivar is denser than the species and is probably
better suited for a screen planting. A row of these
spaced 10 feet apart would make a striking border to
block an undesirable view or to define a space on a
large landscape. Douglas-Fir is most commonly used
as a screen or occasionally a specimen in the
landscape. Not suited for a small residential
landscape, it is often a fixture in a commercial setting.
GENERAL INFORMATION
Scientific name: Pseudotsuga menziesii ‘Fastigiata’
Pronunciation: soo-doe-SOO-guh men-ZEE-zee-eye
Common name(s): ‘Fastigiata’ Douglas-Fir
Family: Pinaceae
USDA hardiness zones: 5 through 6 (Fig. 2)
Origin: native to North America
Uses: screen; specimen; no proven urban tolerance
Availability: grown in small quantities by a small
number of nurseries
DESCRIPTION
Height: 35 to 45 feet
Spread: 10 to 15 feet
Crown uniformity: symmetrical canopy with a
regular (or smooth) outline, and individuals have more
or less identical crown forms
Crown shape: columnar; upright
Crown density: dense
Figure 1. Young ‘Fastigiata’ Douglas-Fir.
Growth rate: medium
Texture: fine
1.
This document is adapted from Fact Sheet ST-527, a series of the Environmental Horticulture Department, Florida Cooperative Extension Service,
Institute of Food and Agricultural Sciences, University of Florida. Publication date: October 1994.
2.
Edward F. Gilman, associate professor, Environmental Horticulture Department; Dennis G. Watson, associate professor, Agricultural Engineering
Department, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville FL 32611.
Pseudotsuga menziesii ‘Fastigiata’ -- ‘Fastigiata’ Douglas-Fir
Page 2
Figure 2. Shaded area represents potential planting range.
Foliage
Leaf
Leaf
Leaf
Leaf
Leaf
Leaf
arrangement: alternate; spiral (Fig. 3)
type: simple
margin: entire
shape: needle-like (filiform)
venation: none, or difficult to see; parallel
type and persistence: evergreen; needle leaf
evergreen
Leaf blade length: less than 2 inches
Leaf color: green
Fall color: no fall color change
Fall characteristic: not showy
Flower
Flower color: red
Flower characteristics: inconspicuous and not
Fruit characteristics: does not attract wildlife; no
significant litter problem; showy
Trunk and Branches
Trunk/bark/branches: droop as the tree grows, and
will require pruning for vehicular or pedestrian
clearance beneath the canopy; not particularly showy;
should be grown with a single leader; no thorns
Pruning requirement: needs little pruning to develop
a strong structure
Breakage: susceptible to breakage either at the crotch
due to poor collar formation, or the wood itself is
weak and tends to break
Current year twig color: green
Current year twig thickness: medium; thin
Wood specific gravity: 0.48
showy
Culture
Fruit
Light requirement: tree grows in full sun
Soil tolerances: clay; loam; sand; acidic;
Fruit
Fruit
Fruit
Fruit
shape: oval
length: 1 to 3 inches
covering: dry or hard
color: brown
well-drained
Drought tolerance: moderate
Aerosol salt tolerance: low
Pseudotsuga menziesii ‘Fastigiata’ -- ‘Fastigiata’ Douglas-Fir
Page 3
extended periods. Protect from direc wind for best
appearance. Some occasional watering in summer dry
spells will help the tree stay vigorous, especially in the
southern end of its range.
Other cultivars include: ‘Anguina’ - long,
snake-like branches; ‘Brevifolia’ - short leaves;
‘Compacta’ - compact, conical growth; ‘Fretsii’ dense bush, short broad leaves; ‘Glauca’ - bluish
foliage; ‘Nana’ - dwarf; ‘Pendula’ - long, drooping
branchlets; ‘Revoluta’ - curled leaves; ‘Stairii’ variegated leaves.
Pests
Aphids infestations on small trees may be
dislodged with a strong stream of water from the
garden hose.
Scale and bark beetles may infest Douglas-Fir,
especially those under stress.
Diseases
Root rot can be a serious problem on clay and
other wet soils.
Needles infected by leaf cast fungi in spring turn
brown and fall off.
Figure 3. Foliage of ‘Fastigiata’ Douglas-Fir.
Other
Roots: surface roots are usually not a problem
Winter interest: tree has winter interest due to
unusual form, nice persistent fruits, showy winter
trunk, or winter flowers
Outstanding tree: not particularly outstanding
Invasive potential: little, if any, potential at this time
Verticillium wilt susceptibility: not known to be
susceptible
Pest resistance: long-term health usually not
affected by pests
USE AND MANAGEMENT
The tree prefers a sunny location with a moist soil
and is not considered a good tree for the south. It
grows but struggles in USDA hardiness zone 7.
Douglas-Fir transplants best when balled and
burlapped and has a moderate growth rate. It tolerates
pruning and shearing but will not tolerate dry soil for
Several fungi cause canker diseases leading to
branch dieback. Maintain tree health and prune out
infected branches.