Zucchini & Yellow Squash Rotting on the Vine

Rotting at 3–4 inches is almost always moisture-related. Squash hate wet feet—unlike cucumbers, they need less water.

Solutions:

• Plant on mounds for drainage.
• Stop watering if rain is adequate.
• Use straw mulch to keep fruit off damp soil.

Wet summers make this worse. Let the soil dry between rains.