. Vegetable gardening. A manual on the growing of vegetables for home use and marketing . e freeze if properly hardened off, and, as isthe case with many other crops, the plants may be protectedwith earth on the approach of hard frost, providing it does notremain over them more than a day or two. In the open ground,lettuce plants should be set out about twelve inches apart eachway. It is frequently grown between rows of early cabbage,cauliflower or other plants where it fills up otherwise unoccupiedspace and comes off the land long before other crops need theroom it occupies. For late use, the
. Vegetable gardening. A manual on the growing of vegetables for home use and marketing . e freeze if properly hardened off, and, as isthe case with many other crops, the plants may be protectedwith earth on the approach of hard frost, providing it does notremain over them more than a day or two. In the open ground,lettuce plants should be set out about twelve inches apart eachway. It is frequently grown between rows of early cabbage,cauliflower or other plants where it fills up otherwise unoccupiedspace and comes off the land long before other crops need theroom it occupies. For late use, the seed is often sown in theopen ground in drills one foot apart and the plants thinned to thesame distance apart. It is customary also in the home garden tosow the seed and then cut off the young plants as soon as they are LETTUCE. 225 large enough to use; such lettuce, however, is not nearly so goodas head lettuce where the center is white, crisp and tender. Itis a far better plan to thin out the young plants so that theystand three or four inches apart in the rows and in cutting con-. Figure 118—Head Lettuce. tinue the thinning process so that the later plants will form goodheads. Of course, it is necessary to make successive sowings oflettuce in order to have it fit for table use over a long all leaf crops, lettuce needs plenty of rich, easily avail-able nitrogenous manure and responds very quickly to small ap-plications of nitrate of soda. Varieties.—There are many varieties and each year findsmany additions to the list of those offered by seedsmen. Inthe matter of quality, those forming a head like the cabbagehave the preference. Varieties that form only a bunch of leavesare largely raised by market gardeners to supply the commondemand, since they are more easily grown and are less liable toinjury in handling than the heading varieties. Some of the mostdesirable kinds are as follows: White Tennis Bail, or Boston iVIarket.—A very popularmarket variety adapt
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