If the corn silk falls off, it usually means the ear has been pollinated and that kernel is starting to develop. The silks dry up, turn brown, and detach after successful pollination.

What it can mean

  • Normal pollination: falling silk is often a good sign that pollen reached the silk and fertilized the ovule.
  • Timing matters: silks can start falling off a few days after fertilization, so this is part of the normal growth process.
  • Not all silks at once: an ear may have some silks fall off while others remain, because each silk connects to a different potential kernel.

When to worry

  • If silks are being clipped or disappearing before pollination is complete, the ear may not fill properly.
  • Missing or uneven kernels can point to poor pollination or silk damage.
  • If you suspect insect damage, Japanese beetles and corn rootworm beetles are common culprits.

Simple check

A common field check is to gently husk the ear and shake it: if dark, curled silks fall out, that often indicates pollination has happened.

TL;DR: corn silk falling off is usually a good sign that pollination succeeded, but if it’s happening too early or because insects clipped the silks, it can lead to poor kernel set.