A. Cantaloupes, like other vining crops such as cucumbers, pumpkins, squash and watermelons, require pollination for fruit set. This means pollen must be transferred from the male blooms to the female blooms. Although cantaloupes are different than other vining crops because they have flowers which contain male and female parts as well as those which contain only male parts, pollination by bees is still necessary. High temperatures or high fertility can cause the cantaloupe to produce only male blooms which results in poor fruit set.
Nematodes can also cause small plants, profusion of blooms and no fruit.
Root knot is a species of nematode which causes galls or swellings on plant roots. It restricts the uptake of nutrients from the root system to the foliage, resulting in a yellow and stunted plant. Root knot lives in the soil and can survive on a number of weed and vegetable crops. Cereal rye should be shredded and tilled into the soil 30 days before planting a spring crop. Most problems with fruit set in cantaloupes are caused by a lack of pollinating insects during the blooming period.