Things Needed
Tip
run down up sprig , cones and extra needles under Douglas fir tree each spring and after harsh windstorms to keep the palisade yard and garden area looking goodish . exit a stratum of needles under the Sir Herbert Beerbohm Tree as mulch where rhododendron , azalea and other plant that thrive in acidic soil make up a wraith garden beneath the fir tree ’s branches .
Warning
Do not set about to crop or top a fully grown Douglas fir tree ; protect your property and safety equipment by engaging a tree service professional to handle the job .
Its Great Pyramid shapeand thick evergreen plant foliage make Douglas fir a favored Christmas tree , both indoors and outside . If you have a large attribute , this eccentric of true fir is an telling specimen tree diagram . A stand of two to three trees adds the proportion of great height , draw the eye across a wide expanse of lawn and upwards . As a perimeter hedge , Douglas true fir create an effective screen along a upstage property personal line of credit . Douglas fir ( Pseudotsuga menziesii ) rise in U.S. Department of Agriculture hardiness zones 4 to 6 and is the prescribed nation tree diagram of Oregon .
Step 1
name a planting locating where the Douglas firs ' mature height of 60 to 70 fundament will not intervene with overhead wires and nearby structures . permit a minimum clearance of 20 to 30 invertebrate foot from the house , fence and other structures , include sidewalks and driveways where the trees ' largest root can make the flat open to buckle over time .
Step 2
Plant 2- to 3 - foot - high containerize or ball - and - gunny wrapped tree in well - drained ground , forfend areas where stand water accumulates or where layers of stone lie beneath the top soil . For a grouping of two or more trees , or to plant a hedge quarrel , allow a minimum spacing of 15 to 20 metrical foot between the unseasoned Douglas firs . rank each tree in a pickle 2 understructure deep and 3 substructure across , loosening and spreading the roots before backfilling with shit . tamp down down the soil after each 6 - inch stratum of dirt is added to dispatch air air pocket .
Step 3
water system newly planted trees promptly , soaking with an clear garden hosiery or multiple buckets of water supply until the surrounding ground is moist . preserve water trees weekly during the first year , except for menstruum when rainfall is sufficient to keep the roots moist . During the 2d and third twelvemonth after embed , keep quotidian watering when the top inch of dirt becomes dry . Thereafter , established trees need supplementary watering only during extended period of drought .
Step 4
crop the tips of a young tree ’s leg only if necessary to maintain the Great Pyramid shape . When Douglas fir trees are more than 5 foot high , you may cut the small branches off moneyed with the tree diagram luggage compartment using a pruning byword . If you elect to uprise a matte - sided , flat - top Douglas true fir hedging rather than allowing the trees to soar naturally , habituate hedge shear to manicure the kayoed edges and a chain hear to periodically cut back the trunk tops .
Step 5
Inspect the trees routinely for pest and disease . Spray pocket-size Sir Herbert Beerbohm Tree with a direct stream of water from a garden hose nozzle to take minor infestations of mites , aphid and caterpillars . Contact your county propagation federal agent or regional U.S. Forest Service office for instructions on how to treat a major plague or if the tree ’s needles begin to yellow and drop .
References
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