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Herbaceous Plants Annuals: SHRUBS ARE commonly grouped either with other shrubs or with herbaceous plants annuals plants and annuals, but some kinds look their best planted as isolated specimens and some can be trained against walls. Magnolia stellata is an excellent example of the former type and pyracantha, Japanese quince (Chaenomelesjaponica), and ceanothus all do well against walls, where their stiff branches may provide support for genuine climbers, such as the less rampant varieties of clematis. Most shrubs take several years to attain their full size. In the meantime, temporary plants, such as dahlias, annuals and herbaceous plants annuals perennials, can be used to fill the space until the shrubs require it all.
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 plants annuals perennials 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. However, to be sure of a regular succession of biennials it is necessary to sow seed every year at the correct season.
Even if summer color is desired, it is still possible to underplant and interplant for other times of the year using bulbs and annuals.
Bulbs and annuals are invaluable for spring and early summer color, while herbaceous plants annuals perennials are the most colorful summer contributors. In many places herbaceous plants annuals perennials can be found in flower for most of the year, and by planting a good cross section it is possible to get a long flowering season. |
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