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Rahmlow, H. J. (ed.) / Wisconsin horticulture
Vol. XXX (September 1939/July-August 1940)

Wisconsin horticulture, vol. 30, no. 10: June, 1940,   pp. [273]-304

Page 299

   Dusting. Until the latter part 
 of June it is well to continue to 
 dust all plants in the garden sus- 
 ceptible to diseases and insects 
 with sulphur rotenone dust. Ad- 
 dition of pyrethrurm in the dust 
 hastens the killing of some in- 
 sects. When real hot weather 
 comes, however, do not use com- 
 mon sulphur for dusting, or lime 
 sulphur for spraying because it 
 may burn the leaves of tender 
 plants. Many prepared dusts for 
 the duster such as Kolo-Roten- 
 one contain a mild type of sul- 
 phur which does not burn, in our 
   Tulips. We noticed again in 
 May that the tulips growing 
 among shrubs on the College of 
 Agriculture grounds in Madison 
 were blooming nicely. They are 
 in rather a dry place where we 
 would not expect them to do 
 well, but it seems that in such a 
 place they do not multiply or 
 the bulbs do not split up as much 
 as in a good garden, so these tu- 
 lips live over year after year. Do 
 not cut down the leaves of tu- 
 lips and other flowering bulbs 
 until they are limp or yellow. 
 Iris. Cut the blooming stalks 
 of iris as soon as the flowers 
 wither. Do not permit them to 
 go to seed. Then do not cut the 
 leaves back, but allow them to 
 grow  naturally until fall. The 
 leaves are manufacturing food 
 to be stored in the rhizomes for 
 next year's flowers. Dusting the 
 leaves frequently with sulphur 
 (lust prevents iris leaf spot. 
 Watch for iris root rot, especial- 
 ly in case of wet weather. When 
 you find such a spot, examine 
 carefully to see if it is caused by 
 the iris borer. If it was, the pro- 
 gram of dusting or spraying may 
 need revision and improvement 
 early next spring. 
 Peonies. There    are    many 
beautiful varieties of peonies. 
June is the time to study them by 
visiting peony gardens. W. A. 
Sissin of Rosendale announces in 
his ad on the back page of thic 
issue that we are all invited to 
Rosendale this month      where 
there are 1,500 varieties of this 
beautiful flower. For a garden 
club tour, drop Mr. Sisson a card 
asking for best dates. Walter 
Miller of Sun Prairie also has a 
large planting. 
   When cutting peony blooms, 
 be sure to leave some of the fo- 
 liage on the base of the stalk for 
 good flowers next year. 
 Changing color of Hydrangeas. 
 The color of the hydrangea 
 shrubs we grow in the garden 
 cannot be changed. The florist 
 hydrangea which may be either 
 pink or blue, is not hardy. The 
 color of this type can be changed 
 by changing the acidity of the 
 soil. If the flower is blue the 
 soil is acid. It is pink if the soil 
 is not acid. The florists control 
 the color by application of com- 
 mon alum (aluminum sulphate). 
 Pruning  Evergreens.- Ever- 
 greens can be pruned this month. 
 The ornamental evergreens such 
 as Junipers, Japanese Yews, Ar- 
 borvitaes, and  Mugho    Pine 
 should be cut back lightly as 
soon as the new    growth has 
reached full size. In this way we 
can prevent the evergreens from 
growing very much and keep 
them nice looking. Prune them 
so they have the shape that you 
like and are best suited for their 
location. They may be pruned 
quite heavily if desired. 
   Pruning Perennials. We can 
 cut back perennials and have 
 them grow more bushy or more 
 branched than if they are not 
 pruned. Hardy chrysanthemums 
 should be pinched back to pre- 
 vent certain varieties from be- 
 coming tall and spindly. Many 
 annuals can be pinched hack to 
 produce a more attractive plant. 
   Some perennials such as Del- 
 phinium, Coreopsis, and Gaillar- 
 dia can be cut back when they 
 are finished blooming and will 
 produce a second crop of flowers. 
 H. J. Rahmlow. 
 Gruff Father to son-"\Vhy 
 don't you get out and find a job? 
 When I was your age I was 
 working for $3.00 a week in a 
 store, and at the end of five years 
 I owned the store." 
 Son-"You can't do that no\\- 
adays. They have cash registers." 
   Cardboard Vase Cover 
     For Flower Shows 
One-piece, lock-type, cone-shape, 
in Gray, Black, White or Tan 
   One-piece shipping boxes 
     3x3x5 for 12 bulbs 
   3yx3V2x5y for 25 bulbs 
     5x4x7 for 50 bulbs 
     6x6x8 for 100 bulbs 
 Samples and prices on request 
        BOX CO. 
      Sheboygan, Wis. 
June, 1940 

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