The following query reached the Editor on the 15th of last month. It is only in rare cases that any inquiry can get reply in the succeeding number that reaches the Editor after the 5th of the month :

" Please let me know through the May number of the Gardeners' Monthly, what kind of roses would do best in this locality, where the temperature sometimes falls as low as 250 below zero. I want them to cover a six-feet fence. I would prefer the hybrid perpetual, if there are any hardy enough and strong growing enough. Any way, please let me have your opinion, and oblige "Yours, Toronto".

April 10th.

[We believe there is little difference in the hardiness of any of the true hybrid perpetual roses. We have known the old Baron Prevost thrive remarkably well as a sub-climber, in a very exposed situation. Those which have become mixed with the tea rose strain, are more tender. Some of the pure Noisettes will stand much severity, such as those related to the Old Champney and Musk cluster. The varieties of the old Sem-pervirens class, such as Belmont aud Felicite perpetuelle, are as hardy as our prairie roses, which are again as hardy as any rose can be. The Ayreshire roses are good and very hardy ones, belonging to the species R. arvensis. Nothing is hardier than the old Boursalt rose, and few more beautiful. The Sweet Brier and Dog rose, are admirable. It is a pity that these classes of very hardy roses have been neglected by improvers. We are still left with only the varieties of half a century ago to select from.