Fig. 2

Timeline showing photoperiod lengths (yellow bar), day/night temperatures (°C; blue bar), and fertilizer concentrations (green bar) used over the course of the study. The date of transplanting (T) is indicated with a dashed blue line. The mean (±2 s.d.) days to first bolting, days to first flowering, and days to first lateral shoot development are shown for Mayodan (Ma) and Spiterstulen (Sp) plants, excluding plants that did not bolt or flower over the course of the study