What Do Discoid Roaches Eat? Complete Diet Guide

What Do Discoid Roaches Eat?

The short answer: almost everything. Discoid roaches are omnivorous and remarkably unfussy eaters. In the wild, they consume decaying plant matter, fallen fruits, leaf litter, and organic debris on the forest floor. In captivity, they'll eagerly eat fresh produce, dry grains, commercial diets, and most kitchen scraps you offer them.

But "they'll eat anything" doesn't mean you should feed them anything. What your discoid roaches eat directly determines their nutritional value as feeders — because whatever is inside the roach at feeding time transfers directly to your reptile. This is the principle behind gut loading, and it makes the roach's diet one of the most impactful things you control in your reptile's nutrition chain.

The Best Foods for Discoid Roaches

Fresh Vegetables (Feed Daily or Every Other Day)

Vegetables are the cornerstone of a quality discoid roach diet. They provide vitamins, minerals, moisture, and — most importantly for gut loading — calcium and vitamin A precursors that transfer to your reptile.

Top-tier vegetables:

• Collard greens — high calcium, excellent for gut loading
• Mustard greens — high calcium, readily consumed
• Turnip greens — strong calcium-to-phosphorus ratio
• Dandelion greens — outstanding all-around nutrition (ensure pesticide-free)
• Butternut squash — very high in beta-carotene (vitamin A precursor)
• Sweet potato — vitamin A rich, slice thin for easier consumption
• Carrots — beta-carotene, widely available, easy to prepare
• Zucchini — good moisture content, readily eaten

Good supplemental vegetables:

• Romaine lettuce (better than iceberg but not as nutrient-dense as dark greens)
• Bell peppers (vitamin C, color variety)
• Broccoli stems (in moderation — contains goitrogens)
• Cucumber (mostly water but good for hydration)

Fresh Fruits (Feed in Moderation, 2-3 Times per Week)

Fruits are higher in sugar than vegetables, so they should complement the diet rather than dominate it. Roaches love fruit and will eat it enthusiastically.

• Apple slices — widely available, good moisture
• Mango — high in vitamins A and C, a roach favorite
• Papaya — digestive enzymes, vitamin C
• Banana — high palatability but also high sugar, use sparingly
• Blueberries — antioxidants, easy to offer
• Watermelon rind — excellent moisture source, roaches love the white flesh
• Grapes — cut in half, good hydration

Dry Foods (Keep Available at All Times)

Dry foods provide protein, carbohydrates, and fiber — and unlike fresh produce, they don't spoil. Keep a small dish of dry food available in the roach bin at all times.

• Commercial roach chow — formulated specifically for feeder roaches, convenient and nutritionally optimized
• Dry dog food — high-quality kibble provides excellent protein. Ground or small-kibble varieties are easier for roaches to consume.
• Fish flakes — high protein, readily consumed, easy to offer
• Rolled oats — inexpensive, good carbohydrate source
• Wheat bran — fiber and carbohydrates, very cheap in bulk
• Chicken feed/layer pellets — high protein, affordable at farm supply stores

Protein Boosters (Important for Breeding Colonies)

If you're maintaining a breeding colony, protein is especially important for reproductive females. Add one or more of these to supplement the dry food:

• Dry cat food (higher protein than dog food)
• Brewer's yeast flakes
• Spirulina powder (sprinkled on vegetables)
• Bee pollen (nutritional powerhouse, available at health food stores)

Foods to Avoid

While discoid roaches can technically eat most organic material, certain foods should be avoided because they can harm your reptile when passed through the gut-loaded roach:

• Citrus fruits (oranges, lemons, limes, grapefruit) — the high acidity can irritate your reptile's digestive system
• Avocado — contains persin, which is toxic to many reptiles and birds
• Onions and garlic — potentially toxic to reptiles
• Iceberg lettuce — not harmful but nutritionally worthless. It's almost entirely water with no vitamins. Use that gut space for something nutritious instead.
• Spinach in large amounts — high oxalic acid binds calcium, counterproductive for gut loading
• Rhubarb — contains oxalic acid, potentially toxic
• Processed human foods — bread, chips, cookies, cereal. These contain preservatives, sodium, and artificial ingredients that have no place in a feeder insect's diet.
• Moldy or rotten food — while roaches in the wild eat decaying matter, moldy food in a captive setting introduces harmful bacteria and fungi into the food chain. Always offer fresh produce and remove old food before it decays.

Feeding Schedule

Discoid roaches don't need a rigid feeding schedule. A simple routine works best:

• Fresh produce: Offer a small amount every 1-2 days. Only provide as much as the roaches will consume within 24-48 hours. Remove leftovers before they mold.
• Dry food: Keep a small dish available at all times. Refill when empty.
• Water crystals: Check every 2-3 days. Refresh when they begin to shrink or dry out.

That's truly all the maintenance required. Discoid roaches are among the lowest-effort pets (if you can call them that) in the entire hobby. Total daily time investment: about 60 seconds.

Feeding for Gut Loading vs. Maintenance

There's a useful distinction between maintenance feeding (keeping your roaches alive and healthy in storage) and gut-load feeding (maximizing their nutritional value before offering them to your reptile).

Maintenance feeding: Any combination of the foods above keeps roaches alive and healthy indefinitely. Kitchen scraps, oats, dog food, and water crystals are perfectly adequate.

Gut-load feeding: For 24-48 hours before you plan to feed roaches to your reptile, switch to high-value gut-load foods — dark leafy greens (collards, mustard greens), orange vegetables (squash, sweet potato, carrots), and a small amount of fruit. This maximizes the vitamins and calcium inside the roach at the moment your reptile eats it.

At All Angles Creatures, we gut-load every discoid roach with premium produce before shipping. When your order arrives, the roaches are already loaded with nutrition and ready to feed. If you plan to hold them for more than a day or two, continue the gut-loading at home to maintain peak nutritional value.

How Much to Feed

Overfeeding roaches isn't really a concern — they self-regulate well and won't eat more than they need. The bigger risk is over-offering fresh food, which leads to uneaten produce rotting in the bin and attracting fruit flies or mold.

A good rule of thumb: offer a piece of produce about the size of a credit card for every 50-100 roaches. Adjust based on how quickly they consume it. If food is gone within a few hours, offer slightly more. If food is still sitting after 24 hours, offer less next time.

Water: The Most Important Part of the Diet

Dehydration kills more feeder roaches than anything else — especially nymphs. Always provide water crystals (polymer gel) as the primary hydration source. Never use open water dishes, as nymphs will crawl in and drown.

Fresh produce supplements hydration but shouldn't be relied on as the sole water source. Water crystals are cheap, safe, and last for days between refreshes. They're the single most important supply in your roach bin.

Feed your discoid roaches well, and they'll feed your reptiles even better. It's the simplest nutrition hack in the hobby.

— Matt, Founder, All Angles Creatures