Thursday, June 13, 2013

Plant Select in Northeast Colorado

In the above picture, Osteospermum 'Avalanche' PP 22,705 or more commonly called Avalanche White Sun Daisy is a wonderful low mat forming plant with continuous flowering throughout the growing season.  This plant provides evergreen foliage throughout the year.  The nature of the foliage is almost succulent.  The blossoms close at night.  On the underside of the ray flowers, they reveal a metallic reverse of the ray flowers.  These plants are xeric.  They do well as a garden border.  As the picture shows, there is pea-gravel around the crown of the plant.  The plants do very well this way.  This plant does well in full-sun.  It is a native of South Africa, but is hardy here in zones 4-9.  It tolerates a wide range of soils from garden loam, clay and sand.

Photo by Linda Langelo

In the above picture, the yellow plant in the foreground is Erigonum umbellatum var aureum 'Psdowns' or more commonly called Kannah Creek Buckwheat.  The plant directly behind the Kannah Creek Buckwheat is Salvia daghestanica or more commonly called Platinum Sage.  These plants make a great combination together in the landscape.

The Kannah Creek Buckwheat is a great border groundcover.  It is xeric.  The foliage stays attractive throughout the winter months with the leaves showing off a reddish hue.  It will take full-sun to partial shade growing in zones 3-8.  And has a wide range of soil choices from garden loam, clay or sand.

The Platinum Sage is also an excellent groundcover plant with low-mounding rosettes of leaves covered densely with silvery, woolly hairs.  The characteristic features of this plant that keep it so xeric are the woolly hairs and the silver color.  Plants with these features are very drought tolerant.  This plant grows in full-sun to partial shade in zones 5-8.  It grows in a wide range of soils from garden loam, clay to sand. 

Monday, June 10, 2013

Northern Accents Roses

In northeastern Colorado, I have a client that has a new introduction of a polyantha rose.  This is a perpetual bloomer with a high resistance to black spot.  A rosarian's dream come true.  Why?  Little to no pruning.  Pruning in the spring to remove weak shoots and little trimming on the tips.  What more could you ask for?    With such an easy care rose, you have lots of time to do all the other favorite things besides gardening and still have time to tweet.  This is something to tweet about!

The University of Minnesota plant breeders are the ones responsible for the Northern Accents roses.  There is a series of four: 'Sven', 'Ole', 'Lena' and 'Sigrid'.   Sigrid is the latest introduction in 2012. 

These polyantha roses have clusters of blooms that repeat and repeat throughout the season.  They are super-hardy polyantha that can survive winter temperatures to -47 degrees Fahrenheit.  For those in northeastern Colorado with extremes of below freezing temperatures and high wind in winter, high winds in spring to dry and hot conditions in the summer, this is the perfect rose.