Transplanting matured head type lettuce for seed production

Abstract

We obtained success in seed production by transplanting matured head lettuce plants into clay pots after (1) removing the head with a knife, leaving a few leaves on the stalk to allow for the development of the shoots, and (2) after removing all leaves covering the seedstalk so that it was free to bolt. The use of gibberellin A3 (GA3) to promote early seed production proved detrimental on poorly established transplants.