|
|
|
Perennials Biennials Flower: MANY BIENNIALS flower in early and midsummer, thus usefully filling an awkward gap that can occur between the spring and summer flowers. Like annuals, they are temporary plants which should be pulled up and put on the compost pile when they have finished flowering. Also, as with annuals, though it's easy enough to save seed of most kinds it is usually impossible to prevent cross-fertilization of different varieties, as a result of which home-saved seed produces only a mongrel population. The distinction between annuals, biennials and herbaceous Perennials biennials flower is not always clear-cut since sometimes varieties of one group can be treated as if they belonged to one of the other groups; hollyhocks (Alcea), for example, can be grown as annuals, biennials or short-lived Perennials biennials flower. However, to be sure of a regular succession of biennials it is necessary to sow seed every year at the correct season.
Pinch out the growing tip of plants such as fuchsias in order to encourage the growth of side-shoots and a bushy habit.
Deadheading is the removal, of flower heads as soon as they have died. Perennials biennials flower and biennials will flower at least once a season if you deadhead them as soon as the first flowers have died.
Plants are called annuals, biennials or per-nnials, according to the length of time the root jves, but the differences are not always absolute, .rid are often changed by cultivation. Perennials biennials flower, >uch as quack grass and peony, often have thickened, tuberlike roots, in which nourishment is stored during the growing periods, to be drawn upon when the plant flowers. Biennials such as beets and carrots show similar development.
|
|
|