MANY OF the ever-blooming roses cannot, in our climate, be cultivated in the open air without extreme precaution to protect them from the cold. To grow them most successfully, the aid of glass is necessary. Many of the Hardy Perpetual roses may also be grown with advantage in pots, by which means their bloom may be prolonged into the early winter months, or they may be forced into premature flowering long before their natural season of bloom. The first essential in the pot culture of roses is the preparation of the soil. Those of delicate growth, like most of the China and Tea roses, require a lighter soil than the more robust varieties, like most of the Hardy Perpetuals. A mixture of loam, manure, leaf-mould, and sand, in the proportion of two bushels of loam to one bushel of manure, one bushel of leaf-mould, and half a bushel of sand, makes a good soil for the more delicate roses. For the more robust kinds, the proportion of loam and of manure should be greater. In all cas............