vernalization
noun
                                                                                                                            
                                                            ver·nal·i·za·tion
                    
                                                                                                              
                                                                                                                                  ˌvər-nə-lə-ˈzā-shən 
                                                      
                                                          
            
                                
              
          
                                                      : the act or process of hastening the flowering and fruiting of plants by treating seeds, bulbs, or seedlings so as to induce a shortening of the vegetative period                                      
                
                    
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