Question
Last year we threw out a pumkin in a garden area on the n,e. side of the house, Many small plants came up . I thinned them and they are gowing all over. Blooms all over but only one pumpkin which started about mid july. Why no more , its the end of august.

Answer
There definitely should be more than one. The problem is the female blossoms were not fully pollinated. This can be caused by a lack of bees in the area. Many gardeners will remove the male blossom and lightly rub it against the female blossoms when pollination is an issue. To attract more bees next year, grow sunflowers, marigolds, cosmos, or some other bright annual in the immediate area.  

One other possibility is that you are over-watering the plants. Water only once or twice per week but very deeply. Shallow watering always results in poor root development and smaller harvests. Also, be sure to mulch heavily with straw or dried grass clippings around the plants to retain moisture and cool the soil.  

Good luck, and please write again if I can ever provide assistance.

Regards,  

Mike