. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. PRENANTHES DrainHKe is necessary in all pots over 4-meh anil tor harii-wODileil plants even tliat size is better drained. Tliis is tecbuically called "cracking," i. e., placing pots- liiTils in the bottom of the pot to allow the quick pas- sage of water and admit air to the roots. Place a large piece
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. PRENANTHES DrainHKe is necessary in all pots over 4-meh anil tor harii-wODileil plants even tliat size is better drained. Tliis is tecbuically called "cracking," i. e., placing pots- liiTils in the bottom of the pot to allow the quick pas- sage of water and admit air to the roots. Place a large piece over the hole in the bottom of the pot and the remainder in smaller pieces. There are usually enough broken pots around a place to supply the needs. Char- coal is an excellent material for supplying pot drainage, none better. An inch or so of drainage is sutJicinnt in a 5- or tj-inch pot, two inches or so for all sizes ;' these. A bottom of broken stone, cinders or gra\i-I is essential upon which to stand the pots, as such a stratum accelerates drainage, while at the same time providint; a moist surface so beneficial to plants in a greenhouse. A few words of caution may not be out of place before closing this branch of the subject. Never shift well ith these days such plants will brini; .noui;!! m thi' best markets to pay for the space ami ' I' 2-and 3-inch pots use sifted soil, but f'n- 1 inrli aiii! i.\-.'r soil well broken, but having plenty of r from ^.d in it, should be used. Always water plants thoroughly after shifting so as to soak the soil to the bottom, and do not water again until they show dryness half way down the pot on the outside. Patrick O'Mara. POURRETIA. SeePiiya. POURTHIfflA villosa. See Pkotinia. PRAIRIE CLOVER. Petalostemon. PRAIRIE DOCK. SUphhim 1947. Too high. plants while the ball of soil is wet; it should be dry enough to crumble readily to the touch. Never shift iTito dirty pots: it will pay to clean them, esp
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