39 f 



doubtful about our having the Welcome in our col- 

 lection, we will prove it to his complete satisfaction 

 by sending him whatever fruit they may produce the 

 next season ; as we prefer, for our own eating, some- 

 thing better than Prince's Seedlings named. 



Mr. Prince says, further, that he refused to sell 

 me plants ; that, at any rate, is a truthful state- 

 ment. I once made a selection from his catalogue, 

 willing to pay him whatever he asked; but, although 

 he had them in his catalogue for sale by the 100 or 

 1000, he had but half a dozen of some kinds in his 

 garden ; and he very naturally refused to sell them 

 to me. 



Mr. Knox has pronounced the Princess Roj^al to 

 be the new variety now sent out as the Haquin. — 

 Whatever may be thought of it in Paris, it is not 

 worthy of cultivation here. He is mistaken about 

 my recommending Georgia Mammoth. In an arti- 

 cle published in the Times and Tribune, and some 

 others of the New York papers, it was recommen- 

 ded merely for its lateness : in flavor it is no better 

 than the Prince's Seedlings in question. Our Na- 

 poleon III. we received from a well known Boston 

 firm, who imported it. It proved to be the Austin. 

 If in error in this, therefore, the error is not mine. 

 Mr. Prince complains that we recommend the Mon 

 itor ; but it is a well known fact that Mr. Prince 

 has placed all the leading, popular varieties upon 

 his rejected list ; his complaint, therefore, is a mat- 

 ter of not much account. The Monitor is one of the 

 three prize Strawberries sent out by the Tribune to 

 50,000 people, and I am sure large numbers of them 

 agree with me. 



Mr. Prince saj^s I am not allowed to enter his 

 grounds : an assertion I am very much inclined to 

 doubt ; for, generally, all who have money to spend 

 are welcome to Flushing, and particularly to Mr. 

 Prince's. 



In conclusion, I think my name, for truthfulness 

 and reliability, stands fully as high as Mr. Prince's, 

 and I am content to leave it here. 



[There appears to be some personal feeling be- 

 tween these gentlemen with which the Gardener s 

 Monthly has nothing to do, and which we fear has 

 led both to rather severer statements than unpreju- 

 dice would warrant. It seems clear that Mr. Prince 

 is mistaken in supposing that Mr. Cavanach has not 

 grown some, at least, of the Strawberries he wrote 

 as having discarded. We are jealous of the correct- 

 ness of the facts which appear in our journal, and 

 Mr. Prince's denial was so absolute, injustice to 

 ourselves we wished to have Mr. C.'s explanation. 

 The matter must now rest here. — Ed.] 



MILDEW ON ROSES, &c. - ITS CAUSES 

 AND REMEDIES. 



BY PETER HENDERSON. 



I have grown Roses largely, in pots for nearly 

 twenty years, but never until last year have we passed 

 over a season without having had mildew, less or 

 or more, on some varieties; more particularly towards 

 the end of our selling season when the plants being 

 scattered, together with the great press of work, 

 prevented ttiem from being sufficiently watered, 

 this was the conducing cause to disease: the dying of 

 the roots checked the sap, and mildew followed. 



But, in my opinion, it makes but little difference 

 from what cause the sap is checked, whether from 

 drying of the roots, whether from cold drafts, or any 

 other impediment to the circulation of the sap, the 

 result is nearly the same on all varieties that are 

 liable to the disease. 



The same causes are undoubtedly attributable in 

 producing the Verbena disease, "biackrust," which 

 appears to be only a species of mildew of what the 

 doctors would call a malignant type. That this disease 

 in the Verbena, when appearing in the greenhouse, 

 is caused by improper treatment only, I think, there 

 is now but little doubt. I have never yet seen it 

 appear unless where the plants had been kept too 

 hot and too dry, or occasionally, where they had been 

 kept too cold, and been frozen, though there is much 

 less danger from this last cause than the former ones. 



In one of my greenhouses containing over 20,000 

 Verbenas, I observed a day or two ago, that only 

 about a dozen of plants were tainted with disease, 

 and these were those that happened to be placed 

 alongside of the expansion tanks, where they were 

 necessarily kept Hot and Dry. 



The same causes act exactly in the same manner 

 when the Verbena is growing outside in summer, 



I have never yet seen the disease attack the 

 Verbena when growing on a rich soil no matter what 

 it was composed of ; but, I have seen it utterly de- 

 stroyed both in sandy and stiff clayey soils, when 

 these soils were poor or exhausted, and thus incapa- 

 ble of continuing the plant in vigorous growth during 

 the hot and dry months of August and September. 



So careful are we to keep clear of this disease in 

 our stock plants that all are cut back about the first 

 week in September, the plants dug around and 

 heavily mulched with well rotted manure, and if dry, 

 copiously watered; thus we keep the plants continu- 

 ally growing, and the disease, thus far, has never 

 been seen either outside nor in, unless as before 

 mentioned a dozen or two around the expansion 

 tanks. My soil in J ersey City was a light sandy loam ; 

 that here in Bergen is a heavy loam, with a blue 



