Answer: Gypsum will help add calcium to the soil and will make that nutrient more readily available to your squash plants. If squash blossom end rot appears, remove the affected fruit you can use a calcium rich foliar spray on the plant. This will ensue that the next round of squash that the plant grows will have sufficient calcium to grow correctly. Look for blossom set spray in your garden center.
As for the ants, they are typically there because of the sap that oozes out of the vines in the hot weather and for the nectar in the flowers although I suppose it is technically possible that they are harvesting the pollen from the male blossoms. Without pollen, the female flowers will not produce fruit.
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