Crested Geckos, Diet and Food, Geckos

Can Crested Geckos Eat Watermelon or Not?

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by The Pet Engineers


A crested gecko’s main diet is insects and fruits. However, that doesn’t mean crested geckos can eat all insects and fruits.

Some insects are harmful when ingested by geckos and some fruits can cause death when a certain amount is eaten.

Watermelon is a juicy fruit with a lot of minerals and nutrients. It’s enjoyed by a lot of people. But, is it suitable for being eaten by geckos?

Can crested geckos eat watermelon in the first place? Here’s everything you need to know about feeding watermelon to your crested gecko.

Can Crested Geckos Eat Watermelon?

Yes, crested geckos can eat watermelon. The biggest advantage of feeding watermelon to a crested gecko is hydration.

Watermelon contains a lot of water and keeps your crested gecko hydrated all day round.

Should You Feed Crested Geckos Watermelons?     

Yes, you should feed crested geckos watermelons. They keep your crestie hydrated and contain a lot of nutrients and minerals.

Watermelons do not contain high oxalic and acid levels that can cause problems to your crested gecko. So, it’s safe to feed it to them.

Watermelon keeps your crested gecko hydrated

Can Baby and Juvenile Crested Geckos Eat Watermelon?

Yes, baby and juvenile crested geckos can eat watermelon. Blending the watermelon with other fruits or just alone is the best way to feed it to them.

How To Feed Your Crested Gecko Watermelon

There are two ways you can feed watermelon to your crested gecko.

First, slice the watermelon into tiny pieces. Place the sliced pieces into your crested gecko’s dish. Make sure the pieces are not too large or they might cause your pet to choke.

The pieces should be smaller than the size of their head as a good measure.

Finally, you can blend the watermelon. This is the best way to feed watermelon to young crested geckos. It goes down their throat easily.

You can blend watermelon with other fruits such as bananas, blueberries, grapes, raspberries, strawberries, and blackberries.

You can also blend watermelon with insects and larvae (calci worms, superworms, dubia roaches, and crickets) to further boost the nutritional value of the meal.

How Many Times Should Watermelon Be Fed To It?

Watermelon should be fed 1-3 times a week or two. That’s more than enough for baby, juvenile, and adult crested geckos.

How Many Watermelons Can You Feed It?

A single watermelon is impossible to feed to a crested gecko and will go waste. Cutting it into small pieces (5-8 for adults, 3-4 for juveniles, and 1-3 for hatchlings) is the recommended amount.

If you plan on blending the watermelon, 20-100ml should be the quantity given.

How Calcium To Phosphorous Ratio Affects Your Crestie

Crested geckos should eat a diet that has a Ca:P ratio of 2:1, 1:1, or 1:0.5. The ratio you decide to feed your gecko can affect their growth, metabolism, and health.

If the gecko consumes calcium above what it needs, it is excreted in its urine.

If they consume too much phosphorus, they store it in their bones and teeth, which can lead to problems like kidney stones and metabolic bone disease.

What Is The Ratio Of Calcium To Phosphorus In Watermelon?

The ratio of calcium to phosphorus in watermelon is 1:1.57. This indicates that there is 1.57 times as much phosphorus as calcium in the watermelon.

Nutritional Value Of Watermelon

Watermelon Nutritional Value
Watermelon Nutritional Value

How To Calculate Ca:P Ratio

You can figure this out by calculating the Ca:P ratio using the formula given below.

According to the nutritional content, the Ca:P ratio is 10.8mg:16.9mg. Dividing through by 10.8 (calcium). The ratio becomes 1:1.57.

How Does Oxalic Acid Affect Your Pet?

Oxalic acid is not a nutrient or essential dietary component and it is not required for normal growth or health.

When oxalic acid is consumed, it binds to the calcium and magnesium in the body and prevents them from being absorbed.

This can lead to calcium deficiency which can be harmful to your pet. Crested geckos are strict insectivores and may not benefit from the oxalic acid in the food and may not be able to digest it.

Some people recommend soaking and rinsing the fruits to get rid of the oxalic acid. However, this is not proven to be effective.

What are the Oxalic Acid Levels In Watermelon?

Watermelons have an oxalic acid level of about 1mg per slice, which is considered low. For this reason, watermelon is absolutely safe to be eaten by geckos.


Watermelon is a juicy nutritious fruit that’s packed with minerals, and vitamins and keeps your crested gecko hydrated.

It doesn’t have high acidic levels that might pose a problem to your pet. In short, yes, your crested gecko can eat watermelons and can be added to its diet.




The Pet Engineers

A team of pet lovers. We have owned various pets over their years. From dogs to reptiles, etc. Our love of pets, strive to us to create up-to-date and accurate helpful guides on pets.

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