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The
mixed perennial borders that comprise the majority of the Mountain
Perennial Garden contain more than 1,000 varieties of both traditional
and unusual perennials, trees and shrubs demonstrating the diversity
of plant material that grows in the this mountain landscape. With
an increasing focus on species originating from mountain regions
around the world, this garden has something interesting and beautiful
to see throughout the season. Included in the Perennial Borders
are two mounded island beds, a long raised border and a xeriscape
garden border. These beds were among the first to be constructed
and planted at Betty Ford Alpine Gardens.
The
Perennial Borders consist of numerous perennials, biennials, flowering
bulbs, ornamental grasses, flowering deciduous shrubs and trees
and dwarf evergreen trees. Some perennials are known for their large
long-blooming flowers (Gaillardia aristata), others for their
fragrance (Lilium citronella) or architectural merits (Iris
sibirica). Some lend terrific fall color (Peonia spp.)
or interesting texture (Tanacetum coccineum). Many biennials
such as Verbascum bombyciferum are best used for their architectural
form and as textural contrast. Flowering bulbs like striped squill,
Puschkinia scilloides var. libanotica, offer very
early spring blooms while others such as fall crocus, Colchicum
sp., bloom into late autumn. Ornamental
grasses like blue oat grass, Helictotrichon sempervirens,
are gaining popularity in mixed perennial borders because of their
dramatic forms, unique flowers and seed heads and vibrant fall colors.
They create great accents and structure in the garden throughout
the year. There is also great value in flowering deciduous shrubs
in mixed borders. Purple-leaf sandcherry, Prunus cistena,
is a shrub that offers beautiful fragrant white blooms early in
the season, purple leaves throughout the season and year-round garden
structure. Dwarf evergreen trees such as dwarf Balkan pine, Pinus
cembra 'Nana', and Montgomery spruce, Picea pungens 'Montgomery'
are clearly excellent mixed border plants in cold climates because
they set off other plants very well with their tremendous year-round
color, contrasting forms and relatively small size.
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This small island garden displays a diverse array of Primula or
"primrose" species. Primula is one the most widespread
and variable of all alpine genera, occurring on nearly every continent
and in most conceivable conditions. There are approximately 400
species inhabiting pondsides, screes and rock crevices. Being mainly
mountain plants many are intolerant of long warm summers making
them ideal candidates for our high elevation climate with cool summer
nights. The genus was named from the Latin 'Prima' meaning first,
since many primula are among the first flowers to bloom in the spring.
We grow approximately 50 different Primula in different
garden settings from the small Primula garden to the West European
Alps Garden and have the small native alpine primrose (Primula
angustifolia) in our native collections. This popular genus
has its own society with more information and a good seed exchange
amongst its members, americanprimrosesoc.org.
More detailed information can be found in 'The Genus Primula,
in Cultivation and the Wild' by Joseph Halda (1992).
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