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If you got lots of flowers,

If you got lots of flowers, you may have had pollination issues. Are there enough bees around? Cantaloupe flowers have a pollination window of one day. Pollen must be transferred from the male flower to the female flower on this day for seed set and fruit development. Fruit size and shape are related to the number of seeds set. Poorly pollinated flowers either abort or produce misshapen fruit.  Poor pollination can happen because of weather conditions or lack of pollinators; you can always use a Q-tip and pollinate yourself to help your plants along!