The size of apical growing points on four grades of sandersonia tuber (3-5, 5-7, 7-10 and >10g) increased with increasing tuber weight (R 2 =0.71). These tubers were divided in two separate experiments to provide weights of 16.7, 33 and 50% and 50, 75 and 100% of the original grade size weights. Tubers were grown in the main season under standard forcing conditions. Harvested stem length was significantly greater with increasing tuber size, but declined with increasing severity of cutting treatment. Similar results also occurred with stem weight, flower number and vase-life. Regression analysis of stem length versus planted tuber size for the combined data from both experiments produced a significant relationship (R 2 =0.83), with the fitted line being: L=673.5-336.9x0.7626 T (where L is the stem length, T the tuber planted weight and 673.5 is the upper asymptote). Stem size and flower number were influenced by tuber weight rather than by apical growing point size.