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Perennials Amy Jo Detweiler. Perennial plants that live for 2+ years once mature they flower annually.

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Presentation on theme: "Perennials Amy Jo Detweiler. Perennial plants that live for 2+ years once mature they flower annually."— Presentation transcript:

1 Perennials Amy Jo Detweiler

2 Perennial plants that live for 2+ years once mature they flower annually

3 Herbaceous non-woody plants that die back and go dormant in winter

4 Perennial lifespan depends on type of plant, soil, climate, care, etc.

5 Perennial types: ground covers biennials border plants rock/alpine plants

6 Perennial types: herbs bulbs ornamental grasses water plants ferns

7 Planning & Design research visit nurseries, gardens neighbors consider time

8 Planning & Design yourself/professional consider site environment

9 Stats for The Dalles USDA Hardiness Zone 6-7 microclimates/frost dates annual precipitation ~ 14” soils – sandy loam/silty loam climate summary at

10 Design principles balance contrast repetition harmony unity dominance


12 Design Elements color texture flower fragrance

13 Design Elements bloom time seasonal interest function mature size


15 Formal Design symmetrical shaped beds straight lines

16 Informal Design asymmetrical shaped beds free-flowing beds

17 Low Maintenance non-invasive resistant sturdy stems adaptable short/long life span

18 Do a design sketch out use a garden hose consider hydrozones


20 Site considerations soil sun/shade wind bed/border existing features viewpoint

21 Plant material nurseries, greenhouse seeds neighbors mail order

22 Soil provides nutrients improves aeration address drainage concerns

23 Soil add organic matter 1/2-1/3 improve water holding capacity

24 Prepare the hole twice as wide as container, same depth amend with soil

25 Containers check out roots avoid planting dry root balls

26 Following planting water new plants in well irrigation type root stimulant optional mychorrhizae

27 Mychorrizae

28 Watering plants water deeply less often avoid water on foliage once established, as needed

29 Drip line


31 Irrigation Test dig down 6-8” ball up soil

32 Using Mulch reduce weeds/weed cloth prevents desiccation prevents erosion

33 Using Mulch covers bare ground 2-5” deep types




37 Maintenance fertilization weeding cutting back transplanting dividing

38 Maintenance winter watering ? pest management reapply mulch as needed

39 Fertilizing avoid direct contact with the roots wait for establishment increase the amount of nutrients available to the plant

40 Fertilizing spring feeding avoid late summer, early fall feedings slow-release, phosphate

41 Weeding weed cloth mulch within a bed

42 Cutting back encourage repeat bloom promote new growth control size

43 Transplanting in spring or fall redesigning mislocation

44 Why divide? decline in vigor becomes invasive for propagation

45 How to divide every 3-5 years early spring, late summer dig around drip line avoid root damage

46 Propagation seeds stem cuttings root cuttings grafting(advanced)

47 Seeding light soil moisten soil sprinkle seeds cover with thin layer of soil repot when larger

48 Stem cuttings in morning cut 3-5” remove bottom leaves dip in hormone place 1/2-1/3 in soil clear plastic

49 Root cuttings 1/4’+ wide roots, 3-4” long when plant is dormant plant upright when growth is seen transplant

50 Other uses cut flowers dried flowers

51 Website

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