. 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. 576 FERN FERN is impure and full of the spores of low forms of plant life, which are very destructive to the prothalli of Ferns. To prevent this, the workshop should be pro- vided with a receptacle in which the water intended for use on Ferns while in the prothallus state can be raised to a boiling temperature,
. 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. 576 FERN FERN is impure and full of the spores of low forms of plant life, which are very destructive to the prothalli of Ferns. To prevent this, the workshop should be pro- vided with a receptacle in which the water intended for use on Ferns while in the prothallus state can be raised to a boiling temperature, which will effectually destroy all spores that may be i^reseut in the water. This is best done by leading a 1-inch steam pipe to within G inches of the bottom of the receptacle and turning on a reasonable pressure of steam. If boiled 12 hours before intended for use, it will be cool enough to be applied, and will be pure. A Fern workshop should also be pro- Aaded with a dry closet, having a number of shelves about 12 inches apart, for storing Fern spores. In beginning the cultivation of Ferns, it is advisable to purchase the spores from some reliable firm which makes Fern-growing a speciality, until a sufficient num- ber of stock plants can be grown to supply spores for home demand. Spores will do about equally well in pots or pans. Pans 12 inches square and 4 inches deep are used for that purpose, as also are the 6-inch common iiower pots. The 12-inch pans should be supplied with 1^ inches and the 6-inch pots with 3 inches of coal cin- ders for drainage. Soil for sowing spores on is best composed of five parts, in the proportions of two parts good garden soil, two parts of finely screened peat and one of sharp, clean propagating sand. Leaf-mold may be used instead of peat, if easier to procure. This soil should be thoroughly sterilized, as already directed. The spore pots should be filled with the soil to within ig-inch mesh, then made absolutely level, firmly pressed and tho
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