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My landscape receives only filtered light through our mature trees and I have a
hard time finding a good variety of plants for color. I have azaleas, camellias
and hydrangeas as foundation plants and use a lot of caladiums, begonias and
impatiens. Can you suggest some other options?
My e-mail response being more extensive, I’ll narrow the list down to my top 10 for the rest of our readers. Some are
perennials, some are annuals. Not all are on this list for their flowers but
all are worthy additions to your semi-shaded landscape.
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time as the mother plant produces offsets, so plant in an area with room for
naturalization.
Alocasia ‘Borneo’s Giant’ – Stunning. Huge. That pretty much sums up this giant Alocasia, often referred to
as Elephant Ears. If your landscape can support the mature size of this plant,
it will undoubtedly be noticed by visitors. Easily reaching 6 feet or more in
its first year, a mature specimen exceeds heights of 10-12 feet with individual
leaves as big as 6 feet. The heart-shaped leaves are held firmly upright by the
hefty stems making the size more manageable in the landscape. A hard winter
could potentially kill
‘Borneo’s Giant,’ so protect it during the first winter of establishment by cutting back the
foliage after the first freeze and mulching for the winter.
Cyathea cooperi ‘Australian Tree Fern’ – I fell in love with this plant when I saw the enormous specimens native to
Hawaii. I had one for several years in a container, wishing I had the courage
to attempt growing it in the ground. After overcoming my fear of losing it to
winter frost, it has been in the ground for two years now and doing well. I
pile mulch around the trunk and keep it well watered through the winter. The
fronds get damaged by freezes but they grow back quickly. Tree ferns benefit
greatly from fertilizer for acid-loving plants, but the fronds are unforgiving
if not watered often enough. As a trunk develops, water both the ground and the
trunk.
Begonia ‘Dragon Wing’ – When you said you currently use begonias in your landscape, I’m assuming you’re referring to the common Wax Begonias. While Dragon Wing Begonias are most
frequently sold as a hanging basket plant, you are missing a stellar performer
if you do not use it in your landscape. I have seen Dragon Wings survive our
mild winters, but I suggest using them as part of an annual bed where they can
be replaced by fall color at the appropriate time
.
Brunfelsia – More commonly known as ‘Yesterday, Today and Tomorrow’ because the fragrant flowers change colors from violet to lavender to white in
a 3 day period. Compact varieties grow to 3-5 feet, and non-compact varieties
usually range from 6-8 feet. Plant in rich soil and feed with slow release
fertilizer, supplementing at least once each year with a water-soluble
fertilizer for acid-loving plants. While mostly considered to be evergreen, it
can be damaged by frost if not planted in a protected area. This plant is
poisonous if ingested, so it may not be a good choice if you have
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pets that eat plants.
Coleus ‘Kong’ – The leaves on Kong Coleus will get 9 inches wide, and the plant itself reaches
a height of about 2 feet. The bold colors and size of the foliage make it stand
out in any shaded area. Of the four colors in the series, I prefer Rose because
of the vibrant contrast of colors. If stems or leaves get damaged by wind or
insects, simply cut off the damage, and enjoy the ensuing flush of new growth.
Because coleus is grown for its foliage and texture, flowers should always be
removed as soon as you see them for two reasons: 1) they are not particularly
attractive, and 2) when the plant is putting all of its energy into flower and
seed production, the foliage suffers in both size and color. The same rule
applies to caladiums.
Ligularia ‘Gigantea’ – While I like other Ligularia cultivars, ‘Gigantea’ is my favorite. It is not spotted like some others, but the leaves get well
over a foot wide and are so dark green and glossy that they hardly seem real.
Each clump gets 2-3 feet tall and 3-4 feet wide and is evergreen in our area.
While it does produce a yellow daisy-like flower in the fall, I personally find
the flowers unattractive. This plant is grown for its foliage, and I can
virtually guarantee it will be one of your favorites, too. While it is tolerant
of some direct sun, it needs to be shaded in the afternoon.
Oxalis ‘Charmed’ – This is not like the weed oxalis you do everything to keep out of your
landscape, although they are related. The Charmed series is the best ornamental
oxalis I
’ve seen. There are three colors in the series: Wine has purple foliage; Velvet
has darker, nearly black foliage; and Jade has green leaves with a silver sheen
to them. All have shamrock-shaped leaves and pink flowers in slightly different
hues. This oxalis is a clumping perennial, reaching heights of 12-15 inches,
and looks best planted in mass groupings.
Torenia ‘Summer Wave’ – This trailing variety of torenia beats other varieties in both flower size and
vigor. There are four colors available in the series, all shades of pink, blue,
purple or white. Summer Wave Torenia would make an excellent flowering
groundcover for your filtered-light landscape because it is tough enough to
handle our summer conditions and bloom all season. Consider torenia an annual
although it is not uncommon for it to survive our winters or reseed itself.
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