Regeneration from rhizome fragments of Agropyron repens

SUMMARY Single‐node rhizome fragments from four swards of Agropyron repens were grown without added nutrients in Perspex growth‐boxes in the dark. Mean values for shoot length; shoot, root and rhizome dry weights; soluble sugar, starch, soluble nitrogen and total nitrogen contents were determined monthly, and the occurrence of ‘late spring dormancy’ noted. Regenerative capacity was greatest in winter and least in summer and often could be related to the rhizomes' total nitrogen content, as there was a correlation between total nitrogen content and shoot dry weight throughout the year. The amount of gibberellic acid in i‐yr‐old rhizomes was less than o‐i figjg in April and June, the months with the two extremes of regenerative capacity.