418 



HORTICULTURE 



May 3, 1919 



horticulture: 



VOL. XXIX 



MAT 3, 1919 



NO. 18 



PUBLISHED WEEKLY BY 



HORTICULTURE PUBLISHING CO. 



147 Summer Street, Boston, Mass. 



Telephone. Beach 292 



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Discount on Contracts for consecutive Insertions, as follows: 



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Bntered as second-class matter December 8. 1904, at th« Post Office 

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CONTENTS 



Page 



BEST STRAWBERRIES FOR DIFFERENT LOCA- 

 TIONS 417 



THE EARLY-FLOWERING MAGNOLIAS 417 



S. A. F. &■ 0. H— National Publicity Campaign— Is the 

 average florists a good business man? 419 



MAKING A ROSE GARDEN 420, 421 



CLUBS AND SOCIETIES: 



Horticultural Society of New York — National Asso- 

 ciation of Gardners 422 



Florists' Club of Philadelphia 435 



AMENDMENT NO. 2 TO REGULATIONS SUPPLE- 

 MENTAL TO NOTICE. OF QUARANTINE NO. 37.. 425 



FORSYTHIA INTERMEDIA SPECTABILIS — Illus- 

 trated 426 



LOCAL AND GENERAL NEWS: 



Washington, New York, Philadelphia 427 



Flowers by telegraph 428 



FLOWER MARKET REPORTS: 



Boston, Washington, Philadelphia 431 



MISCELLANEOUS: 



Does Publicity Pay? 419 



The Year is Beginning to Work 422 



Your Questions Answered 423 



Why There are More Unpaid Claims Against Rail- 

 roads lor Lost or Damaged Goods Than Ever 



Before 424 



Steam Sterilization Kills Diseases Infecting Soils.. 424 



Economy in Manuring 425 



News Notes 427 



Cutworms in Greenhouses and Outside 433 



Experiences of a Woman Greenhouse Grower 435 



Patents Granted 423, 424 



There has been much discussion as 

 Rhododendrons (,, the relative merits of our native 

 American rhododendrons and the 

 hybrid varieties imported from Europe. Of our native 

 species R. maximum has been the species most largely 

 planted. In its natural state it is found in moist, shady 

 woods where if is sheltered from sun and wind. Why 

 ihis rhododendron is so extensively planted by many 

 landscape men in situations where ii is exposed to wind, 

 sun and droughl is a matter quite beyond our com 

 prehension — probably because it produces that which 

 pleases must clients, immediate effect. Such immedi- 

 ate effect is. however, of short duration — the plant- 



die and when the owner learns the reason as lie invari- 

 ably does, the landscape man is discredited by the cli( m 

 and his friends. The owner of a large estate on Lone- 

 Island. N. Y.. in speaking of 1\. maximum had occa- 

 sion to say to us, I was induced to buy a number of ear 

 loads of them at a bargain price of a hundred dollars a 

 ear — it cost me five hundred dollars a ear to get ri 1 of 

 them. Of course R. maximum has its place in land- 



Annuals for 



the rock garden 



scape work and when planted in a suitable situation 

 constitutes a strong and pleasing feature. Rhododen- 

 dron catawbiense thrives in sun, provided it is given 

 a deep soil of average moisture. It does not suffer seri- 

 ously from moderate wind, but in common with all broad 

 Leaved evergreens should not be planted in wind swept 

 situations. It has a much greater range of adaptability 

 than R. maximum. The purple color of the flowers 

 is the only objectionable ( ?) quality of 1!. catawbiense, 

 and in most of the countries of Europe this color is 

 highly esteemed. Rhododendron carolinianum is in our 

 opinion unsurpassed bj any other native species. Its 

 rich, deep green foliage seems to be the hardiest of all 

 and the (dear pink lower clusters are of rarest beauty. 



It seems to thrive equally well in si r partial shade, 



and is especially adapted to wood kind plantings. We 

 think' that this variety offers the greatest possible 

 opportunity for the hybridist who h\ using this species 

 ma\ give us a new race better constituted to our severe 

 climatic conditions than are the hybrids of I!, cataw- 

 biense to winch w . c are now limited. 



Rock gardens are commonly ex- 

 pected to contain only perennial 

 plants yet there are not a few 

 annuals which are well suited to 

 rock garden culture. It often happens that the addition 

 of these annuals does much to improve the appearance 

 of the rockery. This is especially true wdiere bulbous 

 plants have been grown, the annuals keeping up the 

 floral procession. There are two ways of starting them. 

 The simplest is to sow the seeds in the soil in close prox- 

 imity to the bulbs. The other and better plan is to st irt 

 them in the seed bed or a cold frame and transplant 

 them later on. Of course dwarf or trailing plants are 

 the most desirable, and as a matter of course those which 

 are averse to a rather dry soil will not he chosen. It is 

 wise to make a rather close planting at first, even though 

 thinning is necessary later, as sometime- the heavy rains 

 of spring do more or less damage. An English gardener 

 who has been experimenting with the different annuals 

 for rock gardens has made up the following list: 

 Abronia umbellata, fragrant, lilac, trailer: Ageratum 

 Dwarf Blue, very free-flowering; Alyssum maritimum. 

 dwarf, white; A. saxatile (Gold DusI ). yellow, both very 

 fine; Arctotis breviscarpa, orange color, suggestive of 

 the Calendula: Campanula attica, either in purple or in 

 white varieties, profusely flowering dwarfs; dwarf hy- 

 brid Candytufts, various varieties: Collomia coecinea, 

 suggestive of the Bouvardia, scarlet and tall: Esch- 

 scholtzia Mandarin compacta, a brilliant orange; Gilia 

 nivalis, white, and O. minima caerulea, beautiful blue, 

 both 4 inches to G inches in height; Godetia Bijou, the 

 smallest of its class; Gypsophila repens. red ami white; 

 Ionopsidum acaule, a close-growing, very dwarf plant; 

 lilac; Leptosiphon androsacetis, pale purple; Limnanthes 

 Douglasii; Kaulfussia amelloides, white, blue or crim- 

 son; Mesembryanthemum tricolor, must he grown in a 

 sheltered, sunny nook; dwarf Namesias, various, hut 

 only employ the most brilliant kinds; Xemophila : X\o- 

 terinia capensis, white and blue dwarfs: Pansies and 

 Violas; Phlox Drummondii of the smaller sorts; Platy- 

 -icnioii californica. a kind of trailing Poppy with cream 

 flowers; Portulaca, very dainty: Salvia roemeriana, fine 

 scarlet flowers; Sanvitalia procumbens of double so ts, 

 yellow and crimson : Saponaria calabrica, rose or white: 

 Schizanthus pinnatus, very floriferous; Silene pendula 

 compacta, various colors; Tagetes signata pumila, yel- 

 low gems; Virginia Stock, fine in the mass, but be sure 

 to gei selected forms; Veronica glauca; and Whitlavia 

 grandiflora, rather large. 



