The subject of ventilation for rose houses, is one of much importance to rose growers. To grow plants for the purpose of propagation requires a different treatment from that of growing them for bloom. The former requires a close, moist heat, while the latter, though not needing a dry heat, yet requires more air and sunlight. I never had better success than in houses made of portable sash, which, during the summer months were entirely stripped of the sashes, having the full benefit of the rains. The wood splendidly ripened, and very little trouble with spider; they were always prepared to give a full crop of blooms during the winter. This of course applies to plants growing in the natural soil or planted out on benches in the houses.

With Hybrid perpetuals in pots where it is an object to have a succession of blooms, the best SMCcess is always obtained from keeping plants in cold frames or pits where they are so covered as to be accessible at all times during winter, from which they can be set in to grow at such times as the wants of trade require.

Here it may be well to remark that by pot plants is meant such plants as are grown one or more seasons in pots before being forced, and not those taken from the open ground, and rushed into pots in the fall or early winter. The average number of blooms from the latter is generally small in comparison to regular pot grown plants.

For years I have propagated roses from blind as well as blooming shoots and have never noticed any difference in the blooming qualities of plants produced in either way. The matter, however, is well worth investigating. One thing is generally known to rose-growers, which is, that the rose-plants require new soil well enriched.

We may feed manure and fertilizers to banks or benches of roses in whatever quantity we think best, but can never obtain the same results as by occasionally taking out the old soil and renewing with new or fresh soil, - rotten sod, such as florists generally use. If the practical man does not know the chemical constituents of such a soil, he knows what is a great deal more useful for his purpose, the plants will grow well and produce strong wood, from which only, he can expect a good crop of flowers.

A Marshal Niel plant in one of the houses here bore over 2,700 blooms from last Dec. to last June. This is the greatest crop it has borne so far. The only extra treatment it received being an addition of new soil and a mulching of old manure in which a good sprinkling of bone dust was mixed. The plant is not yet 8 years old, the roots growing in the natural soil, and being all inside,budded on Lamarque,'which I think is a better stock than Chromatella; it is certainly more floriferous on the former than the latter. Delaware, O., July, 1885.