Others are biennials producing a number of leaves on a very short stem in the first year, and in the second sending up a flowering shoot at the expense of the nourishment stored in the thick tap-root during the previous season.
- Biennials live through one winter period.
The number of biennials is not large, but a few very desirable garden plants, such as the following, occur amongst them: Agrostemma coronaria (Rose Campion): hardy, I ft., bright rose-purple or rose and white.
Dianthus chinensis (Indian Pink): half-hardy, I ft., various; flower earlier if treated as biennials; must be protected from frost.
In the last week, sow hardy annuals in the borders, with biennials that flower the first season, as also perennials.
Transplant from the nursery to their final sites annuals sown in autumn, with biennials and herbaceous plants.
Biennials and perennials should be sown before the middle of the month.
Sow annuals for succession in the last week, also biennials and perennials in the nursery compartment, for planting out next year.
Transplant strong plants of biennials and perennials to their final situations; also the select plants used for spring bedding.
Frequently, as in many Dicotyledons, the primary root, the original root of the seedling, persists throughout the life of the plant, forming, as often in biennials, a thickened tap-root, as in carrot, or in perennials, a much-branched root system.