The time of transplanting will depend, first, upon the time of sowing and, second, upon when the space will be available for the shifted plants. These two points are usually determined months before the seed is sown. Then, a number of questions of secondary importance should be taken into account. (1) Are the plants ready for this operation? Although it may be the right date to transplant, additional time in the seed bed may be necessary to secure first-class plants. (2) Has the time passed when there is much danger of killing frosts? (3) Are the soil conditions all right— neither too wet nor too dry? (4) Are atmospheric conditions favorable? High humidity makes transplanting a more certain operation than low humidity. Cool and cloudy weather are also advantageous. If the plants have been properly grown and the soil well prepared, transplanting may proceed all day, even though atmospheric conditions are not so favorable. Just before a rain is always the best time, but when many thousands of plants are to be set, the work cannot be done in the few hours when possibly all conditions are exactly right. The latter part of the day is somewhat better than the morning, but this advantage is regarded as of slight importance by large commercial growers.