i.36 GREENHOUSE MANAGEMENT. 



to six-inch pots, and should then be headed back, their 

 final pinching being given in August. The cuttings made 

 as late as June are best grown in a cool house, during the 

 summer, either in pots or planted in the beds. If large 

 specimen plants are desired, they can be obtained by 

 cutting back the old plants after flowering, and growing 

 them another yeai\ 



The best varieties are Hydrangea rosea, Otaksa (Fig. 

 50), and Thos. Hogg. A red-branched variety is also 

 quite popular as a house plant, but it does not force as 

 well as the others. The Eosea is the earliest to flower, 

 and is generally of a clear pink, although, like all of the 

 others, its color is variable. Otaksa, with flesh colored 

 flowers, is, perhaps, most grown by florists, as it is most 

 in demand as a house plant. The Thos. Hogg is a white 

 variety, and is especially desirable for Easter decora- 

 tions. By the use of iron filings in the soil, or by apply- 

 ing alum water, the flowers of this variety, and of 

 Otaksa, take on a light blue color. Peat or soil con- 

 taining iron, will have the same effect. 



If hydrangeas are kept dormant until March or 

 April, they will come into flower in May or June, and 

 will make excellent plants for the porch or veranda, and 

 in tubs or vases can be used with good effect upon the 

 lawn. 



CTTisrs {Genista). 



Although this may be classed among the old-fashioned 

 flowers, it is one of the most useful to the florist and 

 is one of the best spring-blooming house plants. 

 Cytisus (Genista) Canariensis has, in the past, been most 

 commonly grown by florists, but C. racemosus is now 

 taking its place ; by some it is regarded as a distinct 

 species, but it is quite likely only a garden variety. It 

 differs from 0. Canariensis in having longer and 

 pointed leaflets and a longer raceme of larger flowers. 



Either form is readily propagated from cuttings 



