Answer: It sounds like an environmental or cultural problem. Beans are self-pollinating but do require some insect activity or wind to help the pollen fall onto the right flower parts to complete the fertilization process. Beans that develop only half a pod are not completely pollinated. Here are some general bean growing problems and explanations: Excessive fertility often causes beans to bloom profusely but fail to set any pods. High temperature combined with low humidity can also cause beans not to set. Planted at the right time and without excessive fertility, most recommended varieties will produce a crop of high-quality beans. A light fertilizing after the first harvest will greatly increase subsequent yields and improve quality of later harvested beans. Beans must receive 8 to 10 hours of direct sunlight to produce maximum yields.
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