Effect of nitrogen levels and cuttings (main and ratoon) on golden rod (Solidago canadensis L.) during summer and rainy season planting

An experiment was conducted in two seasons and two cuttings in each were taken (main and ratoon) with six nitrogen levels (0, 50, 100, 150, 200 and 250 kg N/ha). Nitrogen was applied once during main harvest. Main harvest had pronounced effect on vegetative parameters during summer and rainy plantings except number of suckers and fresh weight of plant, which was higher during both plantings. While earliest flowering (80.20 days) was observed in ratoon harvesting during summer planting. Nitrogen levels had increased all vegetative growth parameters. Earliest flowering was found at 200 kg N/ha (73.70 days) during summer and at 250 kg N/ha (98.10 days) during rainy planting.