Molinia Caerulea Karl Foerster

Molinia Caerulea Karl Foerster or Purple moor Grass Karl Foerster
Karl Foerster is a beautiful ornamental grass with relatively low maintenance requirements. It is well suited and actually prefers acid soils. If you’re looking for a nice addition to your Cottage or Informal planting, in beds, or as a border, as a gravel planting or in drier areas, this could be an excellent choice! It's full botanical name is Molinia Caerulea subsp arundinacea ‘Karl Foerster’.  
Known for its tufted, deciduous habit, this ornamental grass forms clumps of long, linear leaves which arch and change to yellow in autumn.  In the summer, its flower forms from upright branches and narrow panicles of purplish colours that flow with the breeze.  It reaches an ultimate height between 1 and 1.5 metres, and a spread of 0.5-1.0 metres wide. It takes Molina Caerulea Karl Foerster about 2-5 years to reach its ultimate growth.
The best site to place this beauty in would have full sun or partial shade.  A south, north, west, or east aspect, it can do well in sheltered or exposed locations. The soil should be moderately fertile, and well-drained, but able to maintain good moisture at the same time. pH should be slightly acidic to neutral. A range of textures can be present, from loam to chalk to sand or clay as long as the drainage is good. 
Maintenance requirements for this variety are fairly low. You should plan to remove dead foliage and old flowered stems in the spring, but other than that, she isn’t all that picky.  A real plus of this ornamental grass is that it has very few if any challenges pertaining to pests or diseases.
Also known as Purple Moor Grass, the Molinia Caerulea Karl Foerster ornamental grass will add a touch of colour to your prairie planting or borders, along edges of your yard, or any informal planting. It is a member of the Gramineae family, and has its origins in Eurasia.  It’s considered hardy to Zone H-7, well suited to virtually all of the UK. It bears the name of the German nurseryman Karl Foerster (1874-1970).
So if you’re looking for almost transparent, delicate plumes of ornamental grass on erect and arching stems arising from clumps that originated as purplish shoots in the spring, green foliage in the summer, and yellow in the autumn, have a look at this beautiful variety of ornamental grass.