12. _Red Top._--We can not find this described in agricultural books; but we have been familiar with it for thirty-five years, and can not find a New York or New England farmer who does not know it well and prize it highly. For low, moist, rich meadows, the red top is the best for hay of any known grass. It yields abundantly, and may be cut at any time, from July to last of September. The hay is better for cattle than timothy. Many intelligent gentlemen insist that it is the most healthy hay for horses. After all that has been written on the various grasses, we regard it best for farmers throughout the continent to cultivate only the following:-- For early pastures, _vernal grass_ and _meadow foxtail_; pastures through the season, _white clover_, _cocks-foot_, _meadow foxtail_, _red clover_, and _timothy_; for lowland pastures, _red top_ and _tall fescue_; for hay, _timothy_, _red top_, _orchard grass_, and _tall fescue_; for the shade of fruit-trees, _orchard grass_; to be plowed in as fertilizers, _red clover_ and _white clover_, for soiling cattle, _tall oat-grass_ and _lucern_. Time of sowing grass-seed is important. Some prefer the fall, and others the spring. Fall sowing should be very early or very late. Early sowing will give the young plants strength to endure the frosts of winter, which would kill late sown; but sow so late that it will not vegetate until spring, and it will come up early and get out of the way of the droughts of summer. Grass-seed sown late in the spring will always fail, except when followed by a very wet season. Sow timothy with fall grain, or late in the fall, or on a light snow toward the close of winter. Do not sow clover in the fall, as the young plants will generally fail in the cold winter;--sow it on the last light snow of winter, and it will always succeed. Roll the land in spring on which you have sown grass-seed in the last of winter; it will benefit the grain, and cause the grass-seed to catch well, and get an earlier and more rapid growth. Let all who would not lose their seed and labor, remember that grass-seed not sown so as to form good roots, before the frosts of winter or the drought of summer, will be lost; the plants will be killed. Timothy-seed sown in the fall, one peck to the acre, will produce a good crop the next season. GREENHOUSE.