92 



THE BOOK OF GARDENING. 



plants are preserved through the winter in garden-frames, they 

 will flower strongly the following season ; but if the seed is 

 obtained during the winter, it is as well to sow it in May 

 or June, planting the seedlings, when strong enough, where they 

 are to flower. Seedlings when planted out require exactly the 

 same treatment as the named varieties. 



In hot, dry seasons, the leaves of Hollyhocks become much 

 damaged by red spider, which attacks the under-sides of the 

 leaves. The best way to destroy it is to syringe freely, directing 

 the water to the under-sides of the leaves. This may be done 

 frequently by the use of clean rain-water, and the mechanical 

 action of the water will dislodge the pest. Tobacco-water 

 effectually destroys it. 



I might give a list of names of the best Hollyhocks, but 

 most of the named sorts of a few years back seem to have 

 gone out of cultivation. In the "Appendix," however, some of 

 the best and most recent varieties are enumerated. 



Viola tricolor. 



