Can Turtles Eat Grass? Discover the Facts!

Turtles are unique pets that can bring a lot of joy into our lives. As omnivores, turtles enjoy a diverse diet, including animal proteins as well as fruits, vegetables, and greens. One common question that turtle owners have is whether or not turtles can eat grass. The short answer is yes, many turtle species can eat grass.

Grass provides nutrition, variety, and enrichment to a turtle’s diet. Yet, owners need to be aware of potential risks and follow best practices when feeding grass. By understanding the key considerations around feeding grass, turtle owners can make informed decisions about whether grass is an appropriate supplemental food for their particular turtle.

This article explores the topic in-depth, looking at which turtle species eat grass, the nutritional value of grass, how much to feed, which grass types are best, proper feeding techniques, and other key factors turtle owners should know. Read on to learn the key considerations around feeding grass to turtles.

Turtles are Omnivores

Pet Turtles

Turtles belong to the order Testudines which includes around 350 species. These species evolved as omnivores, meaning they consume both plant and animal matter. Their mouths and digestive systems are designed to process diverse foods.

In the wild, most turtles are opportunistic eaters. They will consume whatever food sources are readily available in their habitat. This includes aquatic plants, fallen fruit, carrion, small invertebrates like insects and worms, fish, frogs, and even small mammals. Their jaws allow them to grasp and tear pieces of food.

Some species have more specialized diets due to the environment they live in. Sea turtles, for example, mainly eat jellyfish, sponges, and algae. Desert tortoises graze on grasses, cacti, and other low-growing vegetation. But overall, turtles are adapted to be generalist, omnivorous eaters. This gives them flexibility to thrive in diverse ecosystems.

Many Species Eat Grasses and Plants

Grasses and plants make up an important part of the diet for many turtle species in the wild.

Here are some examples of turtle species known to eat grasses and other plant materials:

  • Box Turtles – Box turtles are omnivorous and will eat grasses, leaves, fruits and flowers. They particularly enjoy dandelion greens.

  • Tortoises – Most land tortoise species are herbivorous, thriving on grasses, leaves, flowers and fruits. Grass makes up the bulk of their diet. Popular pet tortoise species like the Sulcata tortoise eat lots of grass.

  • Red-Eared Slider – The red-eared slider is an omnivorous freshwater turtle that will eat plants like duckweed, algae and grasses growing alongside the water. They supplement this plant material with proteins like insects, fish and worms.

  • Painted Turtles – Painted turtles enjoy eating plants like duckweed, algae and grasses. The western painted turtle in particular favors eating grasses and weeds near the shoreline.

  • Snapping Turtles – While not exclusively herbivorous, snapping turtles will occasionally nibble on plants, grasses and aquatic vegetation as part of their omnivorous diet.

So in summary, many popular pet turtle species are known to eat grasses and plants to fulfill their nutritional needs. Even predominantly carnivorous or insectivorous turtles will snack on greens from time to time.

Nutritional Value of Grass

Grass for Turtle

Grasses and plants can provide important vitamins, minerals, and nutrients that are beneficial for a turtle’s health and development when given in moderation as part of a balanced diet.

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Some of the key nutrients found in grasses include:

  • Fiber – Grasses contain soluble and insoluble fiber, which aids digestion and gut health. The indigestible fiber also helps with satiety.

  • Vitamin E – This antioxidant vitamin boosts immunity and helps prevent cell damage. Vitamin E supports healthy organs, muscles, nerves and more in turtles.

  • Vitamin K – This vitamin is needed for proper blood clotting. It also plays a role in bone health.

  • Potassium – An essential mineral, potassium helps regulate fluids, heart rate, and blood pressure in turtles. It supports muscle and nerve function.

  • Beta-carotene – This antioxidant is converted to vitamin A, which is vital for eye health, growth and immune function in turtles.

  • Magnesium – This mineral is needed for bone development, muscle contractions, enzyme functions and more.

While grass alone does not provide complete nutrition, when combined with other foods it can contribute valuable nutrients to support a turtle’s health. Moderation is key, as an all-grass diet would be deficient in key proteins, vitamins and minerals. But offering some nutritious greens can benefit both aquatic and land turtles.

Benefits of Grass

Benefits of Grass for Turtle

Feeding grass and vegetation to turtles can provide some key health benefits when done properly.

Below are some of the main advantages:

  • Fiber – Grasses contain fiber that aids digestion and gut health in turtles. The fiber adds bulk to their stool and helps prevent impactions. It also encourages intestinal mobility.

  • Hydration – Many plants and grasses have high water content which helps with hydration. This is beneficial for aquatic and land turtles alike. Well-hydrated turtles will be more active and have increased appetite.

  • Variety – Adding greens to a turtle’s diet provides variety and micronutrients. Rotating different grass and plant types will ensure they get a diverse nutritional profile.

  • Natural behavior – Allowing turtles to graze on fresh grasses and plants allows them to exhibit their natural foraging behaviors. This provides enrichment and mental stimulation.

Making grass part of a balanced diet can positively contribute to a turtle’s health. But it’s critical to feed appropriate types and amounts to avoid overfeeding and complications. When sourcing and preparing grass properly, it can be a nutritious supplementary food.

Risks of Eating Grass

While grass can be a healthy part of a turtle’s diet, there are some risks to be aware of when feeding grass to turtles:

  • Pesticides – One of the biggest dangers of feeding grass is the potential exposure to pesticides, herbicides, and fertilizers. Many lawns and fields use chemicals for maintenance that can be toxic. It’s important to only harvest grass from areas you know are chemical-free.

  • Parasites – Grasses can also harbor parasites that may infect turtles when eaten. Parasitic worms are a common concern, especially from wild-grown grass. Only feed grass you’ve grown yourself or purchased commercially to reduce this risk.

  • Choking hazard – Long strands or blades of grass can pose a choking risk for smaller turtle species or younger turtles. It’s best to chop grass into bite-sized pieces before feeding to turtles.

  • Nutritional imbalance – While nutritious, grass lacks complete nutrition for optimal turtle health. Feeding too much grass could create vitamin/mineral deficiencies if not balanced with other foods.

  • Digestive issues – Some turtles may have difficulty properly digesting grasses, especially tougher fibrous grasses. Introduce new grasses slowly and discontinue use if loose stool or other digestive upset occurs.

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When sourcing and preparing grass for your turtle, be mindful of these potential risks. With care, grass can be a healthy supplementary food for both aquatic and land turtles. But variety and moderation is key.

Best Grasses to Feed

Box Turtle

Some of the best nutritious grasses and plants to offer your turtle include:

  • Dandelion Greens – High in vitamins A, C, K, calcium, and antioxidants. Dandelion greens are a great treat in moderation. They can be fed raw, cooked, or dried.

  • Turnip Greens – Packed with vitamin A, vitamin C, calcium, and folate. The leaves can be chopped and fed raw or lightly steamed. The nutrients are more bioavailable when lightly cooked.

  • Collard Greens – An excellent source of vitamin C, vitamin K, calcium, manganese, and fiber. Collard greens are best when shredded finely and fed raw or blanched.

  • Mustard Greens – High in vitamin E, vitamin K, vitamin C, manganese, calcium, fiber, and antioxidants like carotenoids and glucosinolates. Mustard greens can be given raw, cooked, or dried as a supplemental food source.

  • Watercress – Provides significant amounts of vitamin C, vitamin K, carotenoids like lutein and zeaxanthin, and phenolic antioxidants. It has a high moisture content so feed it fresh, not dried. Chop the leaves into small pieces before feeding.

  • Grass and Weeds – Nutrient-dense options include chickweed, clover, plantain leaves, and wild grasses. Only offer pesticide-free vegetation collected from safe areas. Chop or shred before feeding.

When selecting plants and veggies for your turtle, go for nutrient-dense greens that provide vitamins, minerals, fiber, antioxidants, and moisture. Variety is key for a balanced diet. Rotate between different healthy greens.

How Much Grass to Feed

When offering grass to your turtle, it’s important not to overdo it.

Follow these portion guidelines:

  • For young hatchling turtles under 1 year old, provide 1-2 blades per feeding, 2-3 times per week. Their small digestive systems can’t handle large volumes of grass.

  • For juvenile turtles ages 1-3 years old, offer 3-5 blades per feeding, 3-4 times per week.

  • Adult turtles can handle more grass. Feed 5-7 blades per feeding, working up to daily grass snacks.

  • Limit portions to what your turtle will consume in a 10-15 minute period. Uneaten grass should be removed to prevent spoilage in the tank.

  • Adjust portions based on your turtle’s appetite and interest. If they lose interest, back off and try again another day.

  • For all ages, substitute 1-2 feedings per week with other greens like kale, lettuce, and dandelion greens. Variety is important!

Grass alone should not constitute the bulk of any turtle’s diet. Staple foods like aquatic vegetation, commercial pellets, fish, and insects should make up the majority of their nutrition. Follow the above guidelines to safely supplement your turtle’s diet with nutritious, natural grass.

Ways to Feed Grass

Kale for Turtles

Turtles enjoy and benefit from eating grass, so it’s worth incorporating into their diet.

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Here are some effective ways to feed grass to turtles:

  • Mix Into Their Diet: The easiest way is to mix freshly cut or dried grass into their normal food. Try chopping up some grass finely and sprinkling it over greens, vegetables, fruits or pellets. The grass will add fiber and nutrients.

  • Grow Grass Indoors: For convenient access, grow pots of grass indoors to snip off and feed your turtle. Wheatgrass and oat grass grow quickly and are nutritious. Place the pots near a sunny window and water daily. Cut pieces to mix into meals.

  • Offer Grass Outside: When your turtle is roaming in a secure outdoor space, let them graze on any safe, pesticide-free grass. This gives them the freedom to choose how much to eat. Monitor them to prevent overeating.

  • Create Grass-Based Meals: Occasionally serve a meal with grass as the main ingredient. Chop fresh grass into bite-sized pieces or soak dried grass to soften. Combine with a small amount of vegetables, fruit, protein or supplements.

  • Grow An Indoor Turtle Garden: Plant wheatgrass, clover or alfalfa sprouts in their habitat. This allows turtles to pick live greens right from their environment. Ensure plants are pesticide-free and replace old growth regularly.

The key is to incorporate nutritious, fresh grass into their diet in manageable amounts. With some creativity, you can give your turtle ample access to this healthy supplement.


Turtles are omnivores and can eat grass as part of their diet. Many species like box turtles, red-eared sliders, and painted turtles often eat grasses and plants in the wild. Grass provides nutrients like fiber, vitamins, minerals, and carotenoids that are beneficial for a turtle. Some nutritious grass options to feed your turtle include timothy hay, wheatgrass, and leafy greens like kale, spinach, and lettuce.

It’s best to feed grass in moderation as part of a varied diet. Only feed grass that has not been treated with pesticides or fertilizers. Introduce new grasses slowly and watch for signs of an upset stomach. Grass should not make up more than 10-20% of their diet. For younger turtles, focus more on animal protein from insects, fish, worms, or shrimp. Adult turtles can handle more plant material including grasses. With proper care when selecting and feeding grass, it can be a healthy supplemental food source for many turtles.

Samantha Jenkins
Samantha Jenkins

I am Samantha Jenkins, a devoted turtle enthusiast and conservationist. My love for nature and my special connection with turtles have shaped my life's purpose. In my free time I like to travel and hang out with friends!

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