EARTHSCAPES News

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March 2009 

P.O Box 5405
San Luis Obispo CA 93403
(805)545-9600
Bollinger Landscape

Designing a Perennial Garden

Spring has sprung and now is the perfect time to design a beautiful perennial garden for your landscape.  Before creating the garden consider the following design tips listed below:
 
Light:  There are five main light levels full sun, light shade, partial shade, full shade, and deep shade.  These levels are based on the intensity of light and the duration of time at that intensity.  Combinations of plants selected should include plants that have the same light requirements.  
 
Soil Triangle
 
Soil Type: Choose plants that can survive in the soil conditions found on your property.  Clay soils retain water longer and sandy soils drain quickly.  If soils are sandy consider amending the soil with organic matter to help increase soil fertility and water retention.  If you have heavy clay soils, consider amending with soil buster (gypsum) and organic matter. 
 
 
 
 
Water Requirements:
Create plant combinations with similar water requirements.  Drought tolerant plants such as Salvia will not grow well with higher water loving plants such as Camellia.  
 
Plant Size: Think of the mature plant size when choosing your perennial's, this determines how much room your plant combinations need.  Avoid plants with all the same size and place larger plants in the background and lower ones in the foreground.  Three or four different heights are ideal. Additionally, choose plants with similar growth rates so that one will not out grow the other.
 
colorFlower and Foliage Color: Utilize masses of related colors in both flower and foliage to create a pleasing and harmonious plant composition.  A combination of blue, violet and red produces a cool and restful feel whereas red, orange, and yellow combinations are more intense and vibrant.  Another option would be to use complementary colors such as purple and yellow or blue and orange.  These colors play off one another and cause the colors to appear saturated and especially bright.  A neutral color such as white can be used to help tone down a mass of one color.
 
Plant Form: Plants have six basic forms: Mounding or spreading, oval, pendulous, columnar, rounded, and vase shaped.  Use oval, columnar and vase-shaped plants to draw the eye upward, pendulous or rounded plants to provide continuity, and mounding or spreading plants to fill in the gaps in a bed or boarder.  A mixture of up to three forms is the most aesthetically pleasing.
 

Plant form


 
Texture: Flowers and foliage can have a fine, medium, or coarse texture.  Examples of fine textured plants include: ferns, ornamental grasses, Lavender, and Russian sage.  Coarse textured plants have larger leaves and include plants such as Canna, Bergenia, and Lamb's Ear.  Medium textured plants are between these sizes.  Combine different textures for great visual effect and contrast.  
 
Bloom Time:  Choose plants that bloom at different seasons to create a garden with year round interest.
 
Repetition: Shapes, textures, colors, and sizes should be repeated throughout the garden.  This gives continuity to the design, is aesthetically pleasing and unifies the entire landscape.
 
Some Plant Combinations You Can't Miss! 
 
California Native: Arctostaphylos 'Dr Hurd', Achillea 'Moonshine', Iris douglasiana, Festuca rubra 'Tomales Bay', Verbena lilacina 'De la Mina', and Muhlenbergia rigens
 
Arctostaphylos  Achillea  Iris  Festuca
 
 Arctostaphylos 'Dr Hurd'     Achillea      Iris douglasiana      Festuca 'Tomales Bay'
                                         'Moonshine' 

Verbena  Muhlenbergia

                                           Verbena lilicina               Muhlenbergia rigens
                                   'De la Mina' 

Mediterranean: Helictotrichon sempervirens, Cordyline australis 'Red Star', Penstemon 'Garnet', Lavandula 'Provence', Rosmarinus 'Boule', Phlomis fruticosa, Calandrinia grandiflora, Thymus 'Creeping', and Erigeron karvinskianus
 
Blue Oat Grass    Cordyline    Penstemon    Lavender
 
    Helictotrichon    Cordyline australis   Penstemon 'Garnet'      Lavandula 'Provence'
    sempervirens             'Red Star' 

Rosemary boule     Phlomis     Calandrinia  

                           Rosmarinus 'Boule'     Phlomis fruticosa   Calandrinia grandiflora

Thymus   Erigeron

                                   Thymus 'Creeping'    Erigeron karvinskianus
 
South African: Kniphofia 'Cobra', Dierama pulcherrimum, Leucaspermum 'Flame Spike', Leucadendron 'Safari Sunset', Dodonaea purpurea, Arctotis 'Magenta', Senecio mandraliscae, Gazania

Kniphofia Dierama  Leucadendron  Leucospermum

          Kniphofia 'Cobra'                  Dierama                Leucadendron     Leucaspermum
                                                 pulcherrimum           'Safari Sunset'     'Flame Spike'
 
Dodonaea Arctotis Senecio Gazania

Dodonaea purpurea    Arctotis 'Magenta'       Senecio mandraliscae         Gazania  
 
Tropical: Canna 'Tropicanna', Dahlia 'Fascination Purple', Melianthus major, Brugmansia 'Charles Grimaldi', Colocasia 'Black Magic', Helichrysum 'Limelight', Lotus berthelotii  
 

Canna     Dahlia     Melianthus

           Canna 'Tropicanna'      Dahlia 'Fascination Purple'          Melianthus major
 

Brugmansia   Colocasia   Helichrysum  Lotus

         Brugmansia            Colocasia         Helichrysum 'Limelight'    Lotus berthelotii
    'Charles Grimaldi'      'Black Magic'

Grass Garden: Cotinus coggygria 'Velvet Cloak', Phormium 'Bronze Baby', Pennisetum setaceum 'Rubrum', Stipa tenuissima, Calamagrostis 'Karl Foerster', Pennisetum orientale 

Cotinus     Phormium bronze     Pennisetum rubrum

                      Cotinus coggygria            Phormium       Pennisetum setaceum
                         'Velvet Cloak'             'Bronze Baby'              'Rubrum'

Stipa     Calamagrostis    Pennisetum orientale

                       Stipa tenuissima         Calamagrostis           Pennisetum  
                                                                              'Karl Foerster'             orientale
 

Please view our website for additional information about EARTHSCAPES: www.earthscapes.biz
 
Resources:
Perennial Combinations - C. Colston Burrell
garden.help@jocogov.org
Western Garden Book
 
www.oneplan.org
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