golden thryallis and the royal purple of the
princess flower makes for a dazzling summerlong
would think a shrub or summer annual that blooms all
summer and is drought-tolerant and deer-resistant would
be award-winning across the country. At least golden
thryallis is a Texas Superstar winner and one you will
want to grow too.
certainly needs to go far beyond Texas to any area of
the country that gets stifling hot over the long, hot
summer months. When you want to wild and go indoors,
this workhorse of a plant just gets better.
is a good chance you donít know golden thryallis,
which is also commonly called showers of gold.
Botanically speaking, it is Galphimia glauca and is
native from Mexico to Central America and Paraguay.
is in the Malpighiaceae family, which is also fairly
unknown to the majority of American gardeners. Plants
like the Barbados cherry (Malphigia glabra, native to
Texas) and the butterfly vine (Mascagnia macroptera) are
two other relatives starting to creep their way north
into the green industry trade.
golden thryallis has a long list of attributes that
makes it a winner in the landscape. First and foremost
it has unstoppable blooms from late spring or early
summer until it freezes. This means it is exceptional
value for your gardening dollar.
is considered a Zone 9 and warmer plant, though it has
come roaring back for me in Zone 8 after temperatures in
the high teens and low 20s. Even if yours doesnít and
you grow it as an annual, then you can at least
celebrate that you had terrific golden yellow flowers
blooming for more than 150 days.
single week someone asks me what flowers they can grow
that are resistant to deer. I am happy to say golden
thryallis is resistant; it is not on the menu of the Big
golden thryallis will reach 4 feet tall and a little
over 4 feet wide, undoubtedly larger in Zones 9 and
warmer. The flowers are borne on large spikes in what
almost resembles clusters of blooms. The flowers
partnered with the blue-green foliage and red-tinged
stems make this a truly outstanding shrub.
you locate yours, plant it in fertile, well-drained soil
in full sun. A little shade or filtered light is
tolerated, but wet feet spell doom. Great drainage
increases the chances you have of a spring return. It is
drought-tolerant once established, but keep in mind
supplemental water during prolonged dry periods will
make sure those glorious yellow blossoms just keep
coming. The golden thryallis also makes an exceptional
container plant, allowing you to simply tuck it indoors
by a sunny window.
the years Iíve seen some dazzling combinations. The
most unique was with the princess flower, Tibouchina
urvilleana. The pairing of royal violet and the golden
yellow was truly stunning. At the Coastal Georgia
Botanical Gardens we have some partnered with the
blazing red fire spike, Odontonema cuspidatum, and
others with Mystic Spires blue salvia.
favorite partnership, however, may be where we have it
growing with the dark purple foliage of the Princess
Caroline fountain grass developed by Dr. Wayne Hannah of
the University of Georgia.
thing I can guarantee is once you start growing golden
thryallis, you will never want to be without one to
enjoy for the long, hot summer.