Greenhouse competition experiment
Two E. annuus plants (early germinated, EG, and delayed germinated, DG) that were germinated at intervals of 2 weeks were transplanted into pots (9 × 9 × 9 cm) 6 cm apart. The rosette diameter, number of branches, total branch length, and number of flowers were measured every week for 6 weeks. Six weeks after transplantation, the aboveground parts of both plants were sampled for fresh weight measurements. The sampled plants were dried in a 60 ℃ dryer for 7 days to measure the dry weight.