278 BRASSICACEOUS PLANTS. 



six weeks. Like Asparagus, the roots are injured by exces- 

 sive cutting, and some of the shoots should be allowed to 

 make their natural growth, that strength may be secured for 

 the crop of the following spring. A plantation, with good 

 culture and moderate use, will continue from seven to ten 

 years. 



Seeds. The seeds, which are best preserved in the pods, 

 may be obtained plentifully by allowing a few strong plants 

 to make their natural growth. 



Use. The blanched sprouts are used cooked as Asparagus, 

 or as Broccoli and the Cauliflower. 



No varieties of this vegetable have been introduced. 



