You Cut Open a Watermelon and Found Cracks? Stop Eating It Until You Know What They Mean

Internal cracks in watermelon may signal quality or growing concerns.

Few things are more refreshing than slicing open a ripe watermelon on a hot day. But what if you cut into the fruit and discover large cracks, hollow spaces, or an unusually spongy texture inside?

While some internal cracking can occur naturally, experts say certain abnormalities may indicate poor growing conditions or other quality concerns. Knowing what to look for can help you decide whether the watermelon is still safe to eat.

Why Do Some Watermelons Develop Cracks?

Internal cracks—sometimes called hollow heart—can develop for several reasons.

In many cases, the condition is linked to environmental factors during growth, such as:

• Rapid changes in temperature
• Uneven watering
• Poor pollination
• Fast fruit growth

These cracks do not always mean the fruit is unsafe, but they can affect texture and quality.

However, if the watermelon also has an unusual smell, discoloration, mold, or signs of spoilage, it should be discarded.

What About Growth Regulators?

Some online posts claim that cracked watermelons are always caused by excessive use of plant growth regulators.

Experts say the situation is more complicated.

Certain growth regulators have been used in agriculture to improve crop production in some regions. When used according to regulations, they are intended to help crops grow properly. However, improper use or misuse has raised concerns in some cases.

Because consumers cannot determine the cause simply by looking at the fruit, experts recommend paying attention to the watermelon's overall freshness rather than assuming cracks alone indicate chemical use.

Signs You Should Not Eat a Watermelon

Experts recommend avoiding watermelon if you notice:

• A sour or fermented smell
• Mold on the rind or flesh
• Slimy texture
• Dark or discolored flesh
• Large soft or rotten areas
• Leaking liquid

These signs suggest spoilage rather than a simple internal crack.

How to Choose a Better Watermelon

To improve your chances of selecting a high-quality watermelon:

• Choose one that feels heavy for its size.
• Look for a creamy yellow field spot.
• Avoid fruit with major bruises or deep cuts.
• Tap the watermelon—it should produce a deep, hollow sound.
• Store properly after cutting and refrigerate leftovers promptly.

The Bottom Line

A cracked watermelon is not automatically unsafe, but it deserves a closer look. Internal cracks may simply result from natural growing conditions, while unpleasant odors, mold, or signs of spoilage are stronger indicators that the fruit should not be eaten.

When in doubt, it's always safer to discard questionable food and choose fresh produce from reliable sources.