We planted acorn squash we have three plants producing one acorn squash each in the beginning of the plant, now the rest of the fr

Answer 1

A photo would help me to see exactly what is going on, but it sounds like a calcium/magnesium deficiency. This can be corrected with dolomitic lime.

This article will give you more information on the care of acorn squash: https://www.gardeningknowhow.com/edible/vegetables/squash/growing-acorn-squash.htm