This section is from the book "Manual Of Gardening", by L. H. Bailey. Also available from Amazon: Manual of Gardening.
To have a good hanging basket, it is necessary that some careful provision be made to prevent too rapid drying out of the earth. It is customary, therefore, to line the pot or basket with moss. Open wire baskets, like a horse muzzle, are often lined with moss and used for the growing of plants. Prepare the earth by mixing some well-decayed leafmold with rich garden loam, thereby making an earth that will retain moisture. Hang the basket in a light place, but still not in direct sunlight; and, if possible, avoid putting it where it will be exposed to drying wind. In order to water the basket, it is often advisable to sink it into a pail or tub of water.
Various plants are well adapted to hanging baskets. Among the drooping or vine-like kinds are the strawberry geranium, Kenilworth ivy, maurandia, German ivy, canary-bird flower, Asparagus Sprengeri, ivy geranium, trailing fuchsia, wandering jew, and othonna. Among the erect-growing plants that produce flowers, Lobelia Erinus, sweet alyssum, petunias, oxalis, and various geraniums are to be recommended. Among foliage plants such things as coleus, dusty miller, begonia, and some geraniums are adaptable.
 
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