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Plant Materials for Landscaping

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Plant Materials for Landscaping Plant Materials for Landscaping A list of plants for Oregon, classified by Height Manner of growth Botanical names Common names Flowering habits Geographical zones By Donald J. Martel Federal Cooperative Extension Service Oregon State College, Corvallis Extension Bulletin 758January 1957 Considerable overlapping of "growth areas" and plant zones as included in thispublication should be expected. Zones 2 and 3 do not have clearly estab- lished limits. In general Zone 1Willamette Valley, Coaststrip, and lower elevations of southern Oregon. Con- sidered as a single zone for plant materials included here. Zone 2lower elevations of areas adjacent to Co- lumbia River. Zone 3all higher elevations of eastern Oregon from 2,000 to 5,000 feet. This list was compiled by Donald J. Martel, head, Department of Landscape Architecture, Oregon State College, Corvallis. Contents PUBLICATION has but one objectiveto aid the home THISowner in selecting plant materials for his property, With this Page in mind, 400 of the 1,000 or more plants grown in the State of Low Plants-6 to 12 inches high 4 Oregon have been selected and arranged in tabulation to present this material in a brief, useful form. Small Plants-11 to 3 feet high 7 Medium Plants-4 to 5 feet high 14 LISTED in tabulation are arranged in several height Large Shrubs-6 to 8 feet high 21 PLANTSgroups representing average height attained within a reason- able time under average cultural conditions. Under optimum cul- Tall Shrubs and Shrubby Trees-8 to 20 tural conditions, or after many years, some plants will exceed the feet high 27 height of the group in which they are listed. Development of a plant over a period of 3 to 10 years is of interest to the home Trees : owner. The ultimate size of a few of these plants, attained after a 10 to 20 feet high lifetime, is not of interest to most. Columns indicating "Exposure" 32 and "Zone" are included to establish general sun or shade re- 20 to 30 feet high 34 quirements of plants and indicate areas where they most likely will 30 to 50 feet high 37 thrive. 50 to 75 feet high 39 75 to 100 feet high 41 Here's How It Works over 100 feet high 42 How large a plant do you need? Vines 43 Where is it to be locatedin sun or shade Rhododendron Culture 46 In which zone is it to be planted? Make a selection from those plants with the necessary Heath and Heather Culture 46 qualifications. Low plants.---6 to 12 inches high Zone* Exposuret Remarks Botanical name Common name Manner of growth 1 2 3 Flowers sunp.s.Sh Ajuga reptans Carpet Bugle Spreading ; x Blue, x x x Herbaceous plant with persistent stoloniferous April-May leaves;effective throughout year as ground cover.Varieties have white flowers, bronze or variegated leaves. Grows in full sun or shade but does best in partial shade. Plant at least 12 inches apart. Alyssum saxatile Goldentuft Alyssum Spreading Yellow, x Herbaceous plant for edging, walls, April-May or rocks, with a 2-3 foot spread. Cutbackaboutone-halfafter blooming. Arctostaphylos Kinnikinnick Trailing x xx Pink, x x Wide-spreading evergreen ground (Bearberry) April cover. Plant 18 to 27 inches apart uva-ursi for quick cover. Full sun on dry banks orinpartialshade. Will hang over walls. Sandy or gravelly soilisbest. Bright red berries. Bergenia cordifolia Heartleaf Bergenia Clump x Rose pink, x x Herbaceous plant with persistent (Saxifraga cordifolia) April leaves 4-6 inches across. Divide and reset if clumps become too thick. Flower stalks to 20 inches. Calluna vulgaris var. County Wicklow SPreading x Shell pink, x Double-flowered form. Useful as a County Wicklow Scotch Heather Aug.-Sept. groundcover.See"Heath and Heather Culture." Calluna vulgaris var. Goldleaf Scotch Dense mound x Pink, x Golden leaves in summer ;red in Goldleaf (aurea) Heather July-Sept. winter. See "Heath and Heather Culture." Calluna vulgaris var. J. H. Hamilton Dense mound x Pink, x Double flowers.See "Heath and J. H. Hamilton Scotch Heather July-Sept. Heather Culture." Convallaria Lily-of-the-valley Spreading ;stol x x x White x x Vigorous ground cover for shady rnmalis oniferous May June places. Flowers decorative. Cotoneaster clammeri Bearberry Coton- Trailing x White, x x Slow-growing ground cover ;ulti- easter May-June mate spread of 6-8 feet. Useful on small banks, among rocks, or on masonry walls and terraces. For quick cover, plant 18 inches apart. Red berries. Daphne cneorum Rose Daphne Spreading x xx Rosy pink, x x Pink flowers are this plant's chief April-May attraction. Will do well on well- drained slope or among rocks with- out fertilizer. Erica carnea var. King George Spring Spreading x x Deep rose pink, x Early bloom and compact spread- King George Heath Feb.-May ing habit of growth makes this a useful plant. Tolerates a nonacid soil. Occasionally seen in zones 2 and 3.See "Heath and Heather Culture." Erica carnea var. Springwood Spring Spreading x White, x Similar to King George in form. Springwood Heath Feb.-April See "Heath and Heather Culture." Erica darleyensis *Darley Heath Spreading x Lt. rose purple, x x Will grow to 2 feet with a 3-foot (E. mediterranea Nov.-April spread. See "Heath and Heather hybrida) Culture." Erica tetralix Crossleaf Heath Spreading x x Rosy, x x Gray foliage and summer bloom June-Oct. makethisHeathdesirable.See "Heath and Heather Culture." Festuca ovina Blue Fescue Tuft x x x x x Bluish-gray foliage. Clip off flower glauca stalks. Use as ground cover or edging plant. Helianthemum Sunrose Spreading x x x Yellow, x Grows to 12 inches with spread of nummularium May June 2 feet or more Varieties available ranging from yellow to white to red. Grows wellin nonacidsoil with relatively low moisture con- tent. ee zone map. f Sun, partial shade, shade. 6 to 12 inches Zone Exposure Botanical name Common name Manner of growth 1 2 3 Flowers Sun P.S. Sh Remarks Hypericum calycinum Aaronsbeard St. Spreading; x Bright yellow, xx x Vigorousandinvasiveground Johnswort stolonif erous July Sept cover. Do not plant adjacent to perennials or small shrubs. Iberis gibraltarica Gibraltar Spreading x Pink, x Grows to 15 inches in most soils, Candytuf t April-June if kept moist, with a spread of 2 feet or more. Iberis sempervirens Evergreen Spreading x x White, x Several horticultural varieties are Candytuft May good. Juniperus horizontalis Waukegan Creeping Trailing x x x x x Prostrateconifer 12-18 inches douglasi Juniper highspread 15-20feet.Ground cover for dry locations. Plant 4 or 5 feet apart, Nepeta mussini Persian Nepeta Spreading; stems x x x Violet, x Gray leaves are persistent. Grows erect May-Sept. in most soils. Good edging plant. Pachysandra Japanese Spreading ; x x White, x x Dense mat about 12 inches deep- terminalis Pachysandra stolonif erous May vigorous and invasive. Tends to yellow in full sun. Phlox subulata Moss Phlox Spreading x Purple, x A 6-inch mat useful in rock gar- April-May dens and walls. Needs good drain- age. Does well in niost soils. Vaccinium zut s-idaea Cowberry or Spreading ; x Pinkish, x x Ground cover for sunny or lightly Lingonberry stoloniferous May-June shaded location. Cranberry-like fruitedible. Does wellinlight, peaty, and moist soil. Vinca minor Common Periwinkle Trailing x x x Lilac blue, x x Vigorous, invasive ground cover- stoloni f erous April-Sept. isolate from small shrubs and per- ennials. Adaptable to various con- ditions of soil and exposure. Small plant 11/2 to 3 feet-high Abelia Sherwood's Abelia Round x Lt. pink, xx Evergreen shrub to 3feet, with Sherwood June small leaves and flowers. Not well known. Berberis Warty Barberry Round; dense Gold yellow, xx Sturdy, spiny, broadleaf evergreen verruculosa June with fine texture, dark green leaves. Useful as foundation plant or tin- _ clipped hedge. Rarely seen in zones 2 and 3not totally hardy there. Buxus sempervirens Truedwarf Common Round ;dense Inconspicuous xx Slow-growing broadleaf evergreen var. Truedwarf Box to 3 feet. Most frequently seen as (B.s. suffruticosa) clipped edging plant from 6-18 in- ches high. Calluna vulgaris H.E. Beale Scotch Spreading ; stems x Silver pink, x Broadleafevergreenheather. var. H.E. Beale Heather erect Aug.-Oct. Grows to about 2 feet. See "Heath and Heather Culture." ' Calluna vulgaris var. Searle Scotch Erect x x Rose-pink, x x Same as for H. E. Beale except Searle Heather Sept.-Oct. Searle will tolerate a little shade. See "Heath and Heather Culture." Centaurea cineraria Dustymiller Irregular mound x Purple, Summer x Perennial with persistent leaves to 3 feet tall. Valued for silvery-gray foliage. Chamaecyparis Birdsnest Lawson Round mound x x x x Slow-growingconifer.Formsa lawsoniana var. Falsecypress "nest" of foliage to 3 or 4 feet Birdsnest high and twice as broad. Useful as foundation plant. Cotoneaster Rock Cotoneaster Horizontally Pale pink, x x Deciduous, spreading shrub useful horizontalis spreading June as bank cover. Bright red berries. Can be espaliered. Cotoneaster Rockspray Coton- Horizontally x x White, xx Broadleafevergreenwithdark microphylla easter spreading May-June green leaves. Bright red berries in. fall. Cryptomeria Dwarf Japanese Dense ; round x xx Conifer to 3 feet. Green in sum- japonica var. Cryptomeria mer ;reddish in winter. Dwarf 11/2 to 3 feet Zone Exposure Remarks Botanical name Common name Manner of growth 1 2 3 Flowers Sun P.S. Sh Daboecia cantabrica White Bell Spreading; stems x White, x x Broadleafevergreen,heath like var. Alba Irishheath erect June Nov plant. Masses well if planted 2 feet apart. D. cantabrica var. Purple Bell Spreading ; stems x Purple, x x Same comment as for White Bell Atropurpurea Irishheath erect June-Nov.
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