That the rich tendrils of my beauty's hair May burst into their crowning flowers, and light the painted air."
Perennials are those plants which do not in their growth form either trees or shrubs, but which lose their tops, wholly or in part, every year, after they have done flowering; the roots continuing to live and generate for several years successively.
Imperfect Perennials continue three or more years, and then die, as the Sweet William or Fox Glove, but which, with a little care in dividing the roots every year, can be kept many years.
Perennials are hardy, half-hardy, and tender. Hardy perennials stand the hardest winter without protection; half-hardy require to be well protected; and tender perennials must be kept through the winter in the green-house.
Perennials are of two kinds, bulbous and herbaceous, which, differing materially from each other in habits, require, consequently, a different kind of treatment. Such being the case, a few remarks will be made on each kind separately.