. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. HERBS HERBS 735 during the winter, and if mice are present they may be killed or driven away by placing a few drops of car- bon bisulphide in each hole found. (This is also a good way to rid coldframes of these pests. Plenty of ven- tilation should be given at the time, as the gas evapo- rated is destructive to
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. HERBS HERBS 735 during the winter, and if mice are present they may be killed or driven away by placing a few drops of car- bon bisulphide in each hole found. (This is also a good way to rid coldframes of these pests. Plenty of ven- tilation should be given at the time, as the gas evapo- rated is destructive to vege- tation. As the gas is heav- ier than air, it sinks for the most part down the holes.) If, however, mice are not troublesome, there is no better material for keeping out cold and shedding water than straw. Nature's plan for plant protection is to use the foliage and stems of the plants themselves,the whole ground surface being cov- ered as the weather grows colder with successive coat- ings of snow, which protec- tion again grows lighter as spring approaches. This is still the ideal winter protec- tion for plants, but snows are likely to disappear in midwinter, and mice are well adapted to live under na- ture's laws. Where mice are troublesome a light material may be made by composting leaves, manure rakings from lawns, greenhouse waste, weeds not in fruit as pulled during the season, and the like. The material should be earthy enough to keep mice out, and loose enough to permit of easy removal in spring. It should also be loose enough not to hold too much water in winter. Sawdust and charcoal are ex- amples of such material. Most of the plants that are largely cultivated need no protection, but all herba- ceous perennials, unless they are evergreen or easily smothered, are benefited by a slight covering to protect the soil from alternate freezing and thawing. When the plants are evergreen a covering to supply shade is often desirable. Other plants, such as BeHanthus de-
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