St. John's Wort is a perfect
example of why common names need to be verified with a botanic name.
At your local nursery you will most likely
find a broad leaved variety of Hypericum labeled St. John's Wort. The
botanic for this creeping ground cover is Hypericum calycinum and it has no
herbal use at all. Since there are about 370 different species of Hypericums
it is vital to make sure your plant is labeled Hypericum perforatum if you
are seeking the herbal St. John's Wort. Before you use an herb
medicinally, you should consult a qualified practitioner.
In some areas St. John's Wort may
be invasive. We have not seen that here. In fact, with our dry hot summers
and multitudes of gophers, we have trouble keeping it alive which is a shame
because it makes a great beneficial
Large quantities ingested by livestock or
horses is poisonous.
The patch below
is over 15 years but because our climate is very dry it takes it
a very long time to spread. This section is about four feet by three feet.
It is on a drip which also keeps it from reaching further.