 Much of Weiner’s work has focused on understanding variation in size and allometry among plants using models and experiments (1-4).During the 90’s, Weiner developed the highly influential concept of size-asymmetric competition, the (per unit size) differences in resource uptake between large and small individuals its consequences (5, 6).In addition, Weiner has demonstrated how size-asymmetric competition and evolutionary theory can be applied to increase weed suppression in agriculture (7, 8).