Day 325: The genus Hypericum contains almost 500 species, all of which can be generically termed "St. John's Wort," and includes a wide variety of growth habits from tree-like to woody-stemmed plants which may be annual or perennial. Gardeners are most likely to recognize Hypericum calycinum, a prostrate shrub or ground cover which bears 2" diameter flowers. It blooms almost continuously from early summer into September. While attractive, it is aggressive, spreading by sending out long stolons to emerge several feet away from the parent plant; however, it is this very nature which makes it a good choice for parking strips, driveway borders or in my case, beneath the lowest rails of my rustic fence. No need to search a nursery for it! It starts readily from any piece bearing a rootlet. Just be sure you put it somewhere it won't encroach on your neighbour's yard.
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