If you like to garden and haven't yet explored the wonderful world of herbs, you don't know what you're missing. For starters, herbs are both beautiful and practical. There's no prettier blue flower than borage's--celebrated since the fourteenth century as a mood elevator and "emboldener of the heart"--and no more fascinating foliage than santolina's, which is good for treating bites, skin problems, worms, and discouraging moths. As for freshness...