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12 



The Florists' Review 



July 24, 19 1 a. 



PEOBABLY DEY AT THE EOOT. 



We have several benches of Kaiserin 

 and La France roses which we are grow- 

 ing for the third season; these have 

 never grown well. We also have a bed 

 of Maryland roses from spring stock, 

 which are in excellent condition. The 

 Kaiserin and La France were planted in 

 heavy black clay by another grower, at a 

 depth of fully two inches below the ball. 

 They usually have some red spider. They 

 have been kept mulched all the season 

 with well rotted cow manure and have 

 beeQ well syringed with water. They 

 l>ore one crop in early spring, with good 

 stems; since then the flowers have all 

 been short-stemmed. There is some yel- 

 low foliage on them, though they have 

 good drainage and continuous ventila- 

 tion. It seems as though we cannot en- 

 courage them to make base canes or to 

 break freely and produce stems and 

 blooms. Would wood ashes benefit 

 them ? Thus far they have had no wood 

 ashes, but have had several light dust- 

 ings of lime. F. W. R. 



Both Kaiserin and La France are 

 strong growers and gross feeders in 

 summer. That they bore a good crop 

 of flowers with long stems in the spring, 

 and since then have thrown up only 

 short stems and yellow foliage, is a sure 

 sign that the plants were allowed to get 

 dry at the root. The mulch of cow 

 manure has probably deceived you and 

 caused you to allow. the clay underneath 

 to get dry. Your plants do not need 

 lime or wood ashes nearly so much as 

 they need a good supply of water, to 

 dissolve the manure and wash it down 

 to the roots of the plants, for no plant 

 can absorb food unless it is dissolved, 

 and the only way to dissolve it is to use 

 water. 



To grow Kaiserin and La France prof- 

 itably, they should have a good mulch- 

 ing of manure every two or three weeks 

 during the growing season, with large 

 quantities of water. The water should 

 be allowed to run through the benches, 

 so as to wash out any impurities in the 

 soil; then you will not need to use lime 

 to sweeten the soil, as the water will 

 do this more effectively. In short, the 

 secret of growing good summer roses is 

 water, and plenty of it. W. J. K. 



BLACK SPOT. 



Enclosed you will find some specimens 

 of my rose leaves, which are drying up, 

 getting yellow and falling oflF. First 

 the leaves become black-spotted; then 

 they turn yellow and fall oflF. When I 



j-J.->jVltu«' 



took charge of the house I found the 

 stock in the condition I have described. 

 Please state the cause and the best 

 remedy. P. N. 



The leaves enclosed bore the evi- 

 dences of a bad case of black spot, 

 which is usually caused by lack of ven- 

 tilation and by too much moisture over- 

 head. The best remedy is plenty of ven- 

 tilation day and night, especially at 

 night. At this time of year keep the 

 plants in good growing condition by 

 giving them plenty of feed and water, 

 of which they need good quantities dur- 

 ing the summer, especially if they are 

 large plants, but keep the water off the 

 foliage as much as possible. If the 

 plants are free from spider and are kept 

 wet at the root, it will be well to omit 

 the syringing for three or four weeks; 

 by that time the black spot should have 



disappeared. If that treatment do^, 

 not help them, try Bordeaux mixture 

 spraying the diseased foliage, hut in 

 most cases the trouble will be ovorionie 

 without the Bordeaux, by adopting th( 

 niethofl I have indicated. W. .1. K, 



EOSE LEAF EOLLEE. 



I am a rose grower and have beei 

 bothered with the leaf -roller the last 

 year. I wish The Review would j^et tW 

 rose growers to tell what is the most 

 economical and s.ure8t way to fight thij 

 terrible pest. I have tried hydrdcyanii 

 acid sras, but do not consider it prac 

 tical. It is widespread over the com 

 try, and I should like to know what 

 others are doing for it. |{. S. 



The Review will be glatl to pHbliiii 

 descriptions of all the different methods 

 of controlling the pest. TeM ws hon 

 you do it. 



OUTDO 



QJ/^ 



YSANTHEMUMS. 



Is there any way of fbreing my out 

 door chrysanthemums to open early! 



J. A. W. 



I do not know of any way of forcing 

 outdoor chrysanthemums into flower 

 Even if lifted, potted and placed undei 

 glass, they would not be forwarded m. 

 Any attempt at forcing them in a higk 

 temperature would only spell ruination 

 for the plants. C. W. 



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i SEASONABLE ^ 

 i ^ SUGGESTIONS 



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Cinerarias and Calceolarias. 



It is time to sow seeds of the showy 

 greenhouse annuals, cinerarias and cal- 

 ceolarias, where good-sized plants are 

 wanted. Of course, fairly good ones 

 may be had if the seed 'is sown even 

 as late as the end of August, but if you 

 want cinerarias to flower for Christmas 

 and through January, and if you want 

 herbaceous calceolarias of a size to 

 make them the envy of your neighbors, 

 sow the seeds now in well drained pans 

 or flats of light compost, containing a 

 good sprinkling of sand. "Cover the 

 seeds lightly, if at all, and stand the 

 pans or flats either in a greenhouse 

 with a northern exposure, or in a cold- 

 frame where as cool conditions as pos- 

 sible prevail. Cover each pan or flat 

 with a square of glass after watering, 

 and in addition lay a sheet of paper 

 over them in order to keep the soil 

 moist as long as possible without wa- 

 tering. 



The seedlings will appear within a 

 few days, when light must gradually 

 be given them. Growth is slow in July 

 and August and careless watering may 

 cause the whole lot to damp off. Give 

 them a cool, airy frame or house and 

 look out for the caterpillars which will 

 a little later come along and, if not 

 caught, will soon devour every plant. 

 Both calceolarias and cinerarias barely 

 exist during the two hottest months 

 of the year. With the cooler nights of 



September and October they take 

 added vigor. 



Mignonette, 



Early in August is a suitable tin' 

 to make a first sowing of mignonetf 

 under glass. There is no advantat' 

 sowing earlier, as the plants give 

 ers of mediocre quality and come i" ' 

 time when outdoor flowers arc sttf 

 abundant and good. Mignonette nee* 

 a cool house; one piped to maintain' 

 winter minimum of 40 to 42 degrees* 

 desirable. Either beds or raised bencWf 

 can be utilized. If the latter are "■ 

 be sure no heating pipes run ^*''' 

 them. Mignonette loves to have 

 roots cool and moist. A good ^'^P*,^ 

 soil should be given it, not 1*39 tw 

 six inches, and plenty of well rot 

 manure should be included in ^t. '^J 

 the seeds in little patches twelve i^'J 

 apart each way. Thin the ph'^t? i 

 to two or three to each patch. , 

 them run up to flower, then pinch d ^ 

 well to make the plants brancli. \^ 

 not until steady cold weather ar^i 

 that mignonette reaches its gr«* j 

 perfection. Watch sharply for the ^ 

 bage worms, which have a spc*'** j^^ 

 ing for this plant. Remember »^° ',n 

 fumigation for mignonette must a* J 

 be light, or the foliage will be pcorjjjp 

 Be sure to buy the best seed pro*" 

 for indoor culture. 



