Save our Hemlocks

The hemlock is among the larger trees found in north america , growing to heights of over 80 feet tall and with spreads of up to 30 or more feet as well.  Hemlocks are characterized as being of a pyramidal or conical shape with fine or soft needles.  It is widely considered one of the most outstanding trees with a very deep green top and typically lighter green foliage underneath.

The Canadian hemlock has shallow roots and needs a good sandy soil with plenty of drainage.  Since the roots are not deep, these have the tendency to become uprooted during excessively strong winds or if heavy ice or snow accumulates on them.  Usually some protection is needed if you plan on having one of these near your home and if you live in an area which has frequent strong storms.  A good characteristic of most hemlocks is that they can thrive in the shade and do not need much direct sunlight.

Tsuga canadensis or the common hemlock has long been a popular tree for cultivation.  The trees ability to thrive in partial shade and tolerance of full shade allows it to grow where other trees would not do so well.  It has some other characteristics which make it popular as well, such as its pyramid shape, its fine textured foliage, and its ability to withstand heavy pruning into ornamental shapes.

Hemlock farms prefer areas in which the soil is slightly acidic to neutral with a rich soil that is also well drained or a bit sandy.  Additions of nutrient rich soils blended with a touch of course sand to break it up and be made prior to planting one to give the tree an edge.  However the do well in a wide variety of conditions and will probably thrive just well on there own with no help.

It is suggested to not plant these near roadside where salt is used , as most hemlocks are particularly sensitive to salt which can quickly damage there roots and foliage.  There are a few drawbacks that come with the tree, such as an intolerance for very dry soils or very wet soils that do not drain.  It is also susceptible to attack from an alien pest, the hemlock wooly adelgid which came from asia and now primarily effects hemlock forests , but can easily spread to a home tree.  This bug can easily be treated and the tree effectively cured , however you would need to pick up on it fast because the damage done by the adelgid is permanent.  Some things to look for are shedding needles, white spots on the underside of needles and a change from the typical dark green color of foliage to a more grey/green color.