488 FRITZ BAHR'S COMMERCIAL FLORICULTURE 



Fig. 251. PYRETHRUM ROSEUM HY- 

 BRIDUM. For success with double 

 Pyrethrums you had best propagate 

 by means of cuttings. However, the 

 single ones are easily grown from 

 seed and provide fine early Summer 

 cut flowers 



its fern-like, well- 

 colored foliage it 

 makes an ideal fin- 

 ish for a formal 

 border or bed and 

 can be kept in 

 shape by clipping. 



Sow seed about Feb- 

 ruary fifteenth and grow 

 on in a cool house; all you 

 want is 2^-in. stock. If 

 kept too warm or in a 

 crowded condition it is 

 likely to die off. 



Pyrethrum hybridium 

 includes fine hardy peren- 

 nials, best described as 

 colored Daisies. They pro- 

 duce in early June, long- 

 stemmed flowers in many 

 shades which make fine 

 material for cutting. You can 

 push the plants, too, for the hardy 

 border. They are perfectly hardy 

 and do well with little attention. 



Sow seed in July outdoors for 

 flowering plants. The following 

 year the plants can also be divided 

 in August. There is a good double 

 strain but it is rather difficult to 

 handle. For ordinary purposes and 

 easy culture, the single sorts are 

 best. If you sell hardy stock you 

 want the Pyrethrums; in fact, you 



want them if for no other reason than to cut from. 



Pyrethrum uliginosum is the Giant Fall Daisy. It provides 

 showy plants for the background of a hardy border. By scattering 

 them in groups between other stock that will be out of the way by 

 the middle of September when these Pyrethrums start to become 

 a mass of large Daisy-like flowers, often growing six feet and over 

 in height we can have them in bloom almost up to severe freezing. 

 Being white they form a good contrast to the yellow and brown 

 shades of Helenium, Helianthus, Rudbeckias and other Fall- 

 flowering herbaceous plants. 



To have them most effective they should always be planted in 



