What Do Bearded Dragons Eat? Complete Diet & Feeding Guide

TL;DR: Bearded dragon diet changes dramatically with age: babies need 70–80% live insects (primarily crickets and dubia roaches) and 20–30% vegetables, while adults flip to 70–80% leafy greens/vegetables and only 20–30% insects to prevent obesity and fatty liver disease. Top daily staple greens include collard greens, mustard greens, and turnip greens — all high in calcium and safe for frequent feeding. Never feed avocado, rhubarb, or onions (toxic), and limit spinach and beet greens which bind calcium and can contribute to metabolic bone disease.

Bearded dragons are omnivores — they eat both plants and animals, and their dietary needs shift significantly as they age. Feed a juvenile the same diet as an adult and you risk stunted growth. Feed an adult like a juvenile and you risk dangerous obesity. Getting the diet right is one of the most critical factors in keeping a healthy, long-lived beardie.

This comprehensive guide covers everything: staple foods, safe treats, toxic foods to avoid, feeding schedules, and the supplements that can make or break your dragon's health.

The Basic Bearded Dragon Diet by Age

The ratio of insects to vegetables changes dramatically over a bearded dragon's life:

Young dragons are growing rapidly and need protein-rich insects for development. Adults need far fewer insects — too many leads to obesity, fatty liver disease, and shortened lifespan.

Best Staple Vegetables and Greens

Greens and vegetables should form the bulk of an adult bearded dragon's diet. Offer fresh greens daily. The following are excellent staple choices:

Top Staple Greens (offer daily)

• Collard greens — high calcium, widely available, most beardie-approved
• Mustard greens — high calcium and nutrients, slightly spicy taste
• Dandelion greens — excellent nutrition, high calcium, often loved by beardies
• Turnip greens — good variety staple, high in Vitamin A precursors
• Endive/Escarole — great calcium-to-phosphorus ratio

Good Supplemental Vegetables (2–4x per week)

• Bell peppers (all colors) — high in Vitamin C and antioxidants
• Butternut squash — good hydration and nutrients
• Yellow squash and zucchini — mild and easy to digest
• Snap peas — enjoyed by many beardies
• Acorn squash

Greens to Avoid or Use Sparingly

• Spinach — contains oxalic acid that binds calcium; avoid entirely
• Kale — goitrogenic in large amounts; occasional treat only
• Swiss chard — high oxalates; occasional treat only
• Beet greens — high oxalates; limit
• Iceberg lettuce — nearly zero nutrition, causes diarrhea

Best Feeder Insects

Not all insects are created equal. Variety matters, but some should be staples and others treats only.

Staple Feeders (use regularly)

Dubia Roaches — the gold standard of feeder insects. High protein, low fat, good calcium-to-phosphorus ratio, easy to gut-load. Many bearded dragons strongly prefer them to crickets. You can buy Dubia roaches from Amazon or from specialty feeder insect suppliers.

Black Soldier Fly Larvae (NutriGrubs/Phoenix Worms) — excellent calcium content (unusual for insects), good protein. NutriGrubs are available here.

Crickets — classic, readily available, but smelly and harder to keep alive. They also bite. Many keepers prefer dubia for daily feeding.

Hornworms — high in moisture and very nutritious, but expensive. Good for hydration during shedding or illness. Hornworms on Amazon.

Treat Feeders (1–2x per week maximum)

• Mealworms — high fat, hard to digest for juveniles under 6 months
• Superworms — higher fat, fine for adults in moderation
• Waxworms — like candy for bearded dragons; highly addictive, very fatty. Many dragons will refuse to eat anything else once they discover waxworms. Reserve for rarely.
• Silkworms — nutritious but expensive; good occasional treat

Feeder Insects to AVOID

• Fireflies/lightning bugs — TOXIC, can be fatal
• Wild-caught insects — risk of pesticides and parasites
• Insects larger than the space between your dragon's eyes (impaction risk)

Fruits: Treats Only

Fruits are high in sugar and should only be offered as occasional treats (1–2x per week at most, in small amounts). Safe options include:

• Blueberries
• Raspberries
• Strawberries
• Mango (limit — high sugar)
• Papaya
• Watermelon (mostly water, minimal nutrition)
• Prickly pear cactus (actually quite nutritious)

Avoid: Citrus fruits (acidic and irritating), avocado (toxic), and rhubarb (toxic).

Completely Toxic Foods

Some foods are dangerous or deadly to bearded dragons. Never feed:

• Fireflies/lightning bugs — a single firefly can kill a bearded dragon
• Avocado — toxic to reptiles
• Rhubarb — toxic, high oxalic acid
• Onion, garlic, chives — toxic to reptiles
• Wild mushrooms — often toxic
• Iceberg lettuce — while not toxic, causes severe diarrhea and provides no nutrition
• Any wild-caught insects — pesticide and parasite risk

Essential Supplements

Diet alone isn't enough — bearded dragons need regular supplementation to stay healthy in captivity.

Calcium with Vitamin D3

Use a calcium + D3 supplement to prevent Metabolic Bone Disease (MBD). Dust feeder insects at every feeding for juveniles, every other feeding for adults.

Recommended: Rep-Cal Calcium with Vitamin D3 or Miner-All Indoor Formula.

Multivitamin

Offer a reptile-specific multivitamin 1–2x per week. Look for one with preformed Vitamin A (retinol), not just beta-carotene, which bearded dragons may not convert efficiently.

Recommended: Repashy Supervite or Herptivite.

Gut-Loading

Before feeding insects to your dragon, feed the insects nutritious food for 24–48 hours. This "gut-loading" transfers nutrients to your beardie. Use commercial gut-load products or fresh vegetables (leafy greens, carrots, sweet potato).

A good pre-made option: Repashy Bug Burger.

Feeding Schedule

Juveniles (under 12 months)

• Insects: 2–3 times daily, as many as they'll eat in 10 minutes
• Greens/veggies: Available at all times in the enclosure
• Supplements: Calcium + D3 at every insect feeding; multivitamin 2x/week

Adults (18+ months)

• Insects: 3–5x per week
• Greens/veggies: Fresh greens daily
• Supplements: Calcium every other feeding; multivitamin 1–2x/week

How to Feed Bearded Dragons

Proper feeder size: Never offer insects larger than the space between your bearded dragon's eyes. Oversized feeders can cause impaction or even neurological damage.

Feeding method: You can use feeding tongs, a feeding dish, or let insects roam the enclosure. Remove uneaten crickets after 15–20 minutes — they can bite your dragon while it sleeps.

Hydration: Mist your dragon's snout 2–3x per week or offer a shallow water dish. Some beardies drink from drippers. Adequate hydration is important, especially during shedding.

Temperature before feeding: Make sure your dragon has properly warmed up to their basking temperature before offering food. Feeding a cold beardie leads to poor digestion and can cause serious health issues.

What About Baby Food and Commercial Diets?

Many owners ask about commercial bearded dragon diets (pellets) and baby food as shortcuts.

Pellets: Some commercial pellets like Repashy Beardie Buffet can serve as occasional supplemental food, but should not replace fresh greens and live insects entirely. Hydration and live prey movement stimulate healthy feeding behavior.

Baby food: Plain squash or pumpkin baby food (no additives) can be used to encourage reluctant eaters or as a medicine delivery vehicle, but shouldn't be a staple.

Signs of a Healthy vs. Unhealthy Diet

Signs your beardie is eating well:

• Alert, active behavior
• Healthy weight (visible fat pads, no visible ribs or spine)
• Firm, well-formed droppings (brown/dark with white urate)
• Clear eyes and regular, complete sheds

Signs of dietary problems:

• Lethargy, weakness, or trembling (possible calcium deficiency/MBD)
• Swollen limbs (MBD)
• Runny droppings (possible diet issue or infection)
• Loss of appetite beyond normal brumation
• Obesity (hard, round belly; dewlap fat rolls)

If you notice anything concerning, see our guide on common lizard owner mistakes — diet errors are among the top problems new keepers make. And if something seems medically wrong, check our reptile handling guide on how to safely transport your dragon to a vet.

Seasonal Diet Variation

In nature, bearded dragons eat different foods across seasons. You can mimic this in captivity:

• Spring/Summer: More insects (mimics active season prey abundance)
• Fall/Winter: Fewer insects, more vegetation (supports brumation prep)

This seasonal variation may help regulate breeding cycles and overall health.