The annual Phlox is propagated by seed sown early in the spring in the border, or in March in boxes and transplanted. The perennial Phlox is increased by division of the roots, the flowers being larger and more highly colored by dividing at least every three years. The annual Phlox blooms early, and continues until late in the fall. The perennial blooms from July to frost.
Pink. See [Dianthus] and [Carnation].
Plum. Of Plums there are three general or common types: first, the common Domestica or European Plum, which gives rise to all the older varieties, like Lombard, Bradshaw, Green Gage, the Prunes, the Egg Plums, the Damsons, and the like; second, the Japanese Plums, which have become popular within the last ten years, and which are adapted to a wider range of country than the Domesticas; third, the native Plums of several species or types, which are adapted to the plains, the middle and southern states, where the Domestica Plums do not thrive, and some kinds to the cold North.
Wherever the Domestica and Japanese Plums can be grown, the native Plums are not destined to become popular; but many of the natives are much hardier than others, and are therefore adapted to regions in which the Domestica and Japanese are not safe. Others of them are well adapted to the middle and southern states. The Domestica and Japanese Plums are considerably hardier than peaches, but not so hardy as the apple. The northern limit of their general cultivation is the southern peninsula of Michigan, central and southern Ontario, central New York and central New England.
Plums thrive on a great variety of soils, but they do better, as a rule, on those which are rather heavy and have a considerable content of clay. In fact, many of the varieties will thrive on clay as hard as that upon which pears will grow. On the other hand, they often thrive well upon light, and even almost sandy soils.
The trees are set when they are two and three years from the bud. It is preferable to have Plum trees on stocks of the same species, but it is not always possible to secure them at the nurseries. In the South, Plums are worked mostly on peach roots, and these make excellent trees where the climate is not too severe, and especially upon the lighter lands on which they are planted in the South. In the North the larger part of the Plum stocks are grown on the Myrobalan Plum roots. This Myrobalan is an Old World species of Plum, of smaller growth than the Domestica. This stock, therefore, tends to dwarf the tree, and it is also likely to throw up sprouts from the roots. Plum trees are set from 12 to 18 feet apart. Many growers like to set them 8 feet apart in rows, and have the rows from 16 to 20 feet apart.
Plums are pruned much the same as apples and pears. That is, the top is thinned out from year to year, and all superfluous branches and broken or diseased wood are removed. If the soil is very strong and the trees are close together, it may be well to head them in a little each year, especially those varieties which grow very strong and robust.
Plums
The varieties of Plums are very numerous. Of the Domestica or European type, some of the best are Bradshaw, Imperial Gage, Jefferson, Reine Claude, Coe Golden Drop, Quackenbos, Fellemburg, German Prune, Copper. The Lombard is the most cosmopolitan variety, and is always sure to give a crop, but the quality is not so good as that of the others mentioned. For culinary purposes, some of the Damsons, which are very small-fruited varieties, are excellent. Of Japanese Plums, the best so far tested for the North are Red June, Abundance, Burbank, Chabot and Satsuma. For a very early cherry-like Plum for home use, the Berger is excellent. Of the native Plums, the most cosmopolitan variety is Wild Goose. Excellent varieties are Weaver, Quaker, Forest Garden, Wayland, and others.