Fig. 9

Apical bud break during the spring of 2014 expressed as percentages and measured weekly between March 20 and May 2. Seedlings had been subjected to SD (short day) treatments (11 h light; 13 h night) of various lengths starting on July 15, 2013 and thereafter kept indoors or outdoors. Control seedlings in both growing environments were kept under natural day length. Seedlings previously grown and stored in outdoor conditions were transferred indoors on Oct. 28, 2013