222 PRACTICAL PLANT PROPAGATION 



VACCINIUM Continued 



ii. Those plants that make sufficient growth to require repotting 

 during the first Summer should be set in clean pots of two inches larger 

 diameter in a standard Blueberry soil mixture. 



SOIL MIXTURE FOR BLUEBERRIES. Use "one part of clean or washed 

 sand, nine parts of rotted upland peat, either chopped or rubbed 

 through a sieve, and three parts of clean, broken crocks, or flower 

 pots. No loam and especially no lime should be used. Manure 

 is not necessary. The peat most successfully used for potting 

 Blueberry plants is an upland peat procured in Kalmia, or Laurel, 

 thickets. Oak leaves raked, stacked, and rotted for about eighteen 

 months without lime or manure are also good." 

 TUBERING. Cuttings by ordinary methods have been seldom rooted. 

 Tubering is a method by which new shoots are forced in such a 

 way that their basal portions are much like scaly rootstocks stem. 



Cuttings are taken from outdoor plants between Midwinter and early 

 Spring, before the buds have begun to make their Spring growth. 



The cuttings are placed horizontally in a shallow box or other cutting 

 bed of pure clean sand and covered to the depth of about half an inch. 



Within a few weeks new growth will begin to appear above the 

 sand. (See fig. 107.) When the shoots have reached a length pro- 

 portionate to their vigor, commonly one to three inches, their further 

 growth is self-terminated by the death of the tip. After the leaves 

 have reached their full size and acquired the dark-green color of ma- 

 turity the time has come for the development of roots. 



When a shoot is well rooted, with roots one to two inches in length, 

 it is ready to be potted. If the shoot has not already disconnected itself 

 from the dead cutting, it should be carefully severed with a sharp knife. 

 In the process of tubering, the behavior of the cuttings is essentially 

 identical with that of real tubers, like those of the potato. The original 

 cutting dies, but the sprouts that arose from it root at the base and 

 form independent plants. 



VIBURNUM. Includes Snowball. High Bush Cranberry. 



SEEDS. Wash free from pulp; sow in Autumn or mix with dry sand, 

 keep in a cool place and sow in Spring. Especially V. acerifolium, 

 V. cassinoides, V. dentatum, V. dilatum, V. lantana, V. lantanoides, 

 V. lenlago, V. molle, V. opulus, V. opulus nanus, V. prunifolia and 

 V. americana. 



CUTTINGS. Soft wood in Summer root readily, especially V. opulus 

 sterilis, V. opulus nanus, V. tomentosa, V. tomentosa sterilis and V. 

 plicatum. Hard wood cuttings are easily rooted. 



LAYERS. Early Summer. 



VITEX. Chaste Tree. Hemp Bush. 

 SEEDS. Freely produced. 



CUTTINGS. Soft or hard wood; the hard wood cuttings may set in a 

 protected place in the Autumn. 



VITIS. Grape. 



SEEDS. Rarely come true to type but for raising seedlings of new 

 varieties, the seeds are removed from the pulp and stored in moist 

 sand until Spring when they may be sown in flats or in the open soil. 

 Except those of the tender types, the seeds may benefit by being 

 frozen during the Winter. 



