Most of them, in small amounts. Five crops are not safe for a dog, and two of the five are ones almost nobody names: buckwheat and parsley.
The five to keep away from a dog
The alliums: onion, chives, leek and garlic. Sulfur oxidants cause canine red-cell injury. Merck reports signs in dogs at 15 to 30 g of raw onion per kg of body weight, which is a lot more than the feline threshold but is still a real number on a real curve. No dose exists for allium material at microgreen stage.
Buckwheat. This one surprises people. **ASPCA lists Fagopyrum species as toxic to dogs**, naming fagopyrin, causing photosensitization, sunburn and dermatitis. It is a whole-plant listing with no canine dose, and no dog has been fed buckwheat microgreens in a study, so the stage limitation stands. But the basis is real and traceable.
Parsley. ASPCA lists it toxic to dogs as well as cats, on furanocoumarins, again photosensitization and dermatitis after large amounts.
Buckwheat and parsley are the two worth remembering, because they are ordinary culinary microgreens that nobody treats as hazardous.
Sunflower, where the clearance you will see is for a different species
You will see "sunflower is ASPCA non-toxic" used to green-light sunflower microgreens for dogs.
**The ASPCA entry is for Helianthus angustifolius, swamp sunflower.** The crop in a microgreen tray is Helianthus annuus. A non-toxic listing for one species in a genus is not a clearance for another, and it is certainly not a clearance for a different growth stage of another. Sunflower is not established for dogs. It is not flagged as dangerous either; it is simply not answered, and the citation people pass around does not answer it.
The crop table
Hover or tap a row to highlight it.
| Crop | Verdict | What the evidence supports |
|---|---|---|
| Chives | Unsafe | Allium sulfur oxidants, canine red-cell injury. No safe dose at any stage |
| Leek | Unsafe | Same allium mechanism |
| Onion | Unsafe | Signs at 15 to 30 g raw onion per kg body weight |
| Buckwheat | Unsafe | ASPCA, fagopyrin, photosensitization and dermatitis. No canine dose |
| Parsley | Unsafe | ASPCA, furanocoumarins, photosensitization after large amounts |
| Broccoli | Caution | Mature broccoli: isothiocyanate GI irritation, considered safe under 10 percent of daily intake, potentially toxic above 25. Not a microgreen dose |
| Kale | Caution | Mature kale: calcium oxalate and isothiocyanates. Advised against as a regular treat, and relevant to stone-prone dogs |
| Sunflower | Not established | The ASPCA non-toxic listing is a different species. See above |
| Radish | Not established | Do not substitute ASPCA's wild-radish horse listing for the cultivated crop |
| Mustard | Not established | Species-ambiguous, and the dog verdict cannot be inferred from horse listings |
| Arugula | Not established | No canine source |
| Carrot | Not established | No canine microgreen source |
| Pea shoots | Not established | No canine source. Do not confuse garden pea with sweet pea, which is a different genus |
| Wheatgrass | Not established | A retail "pet grass" claim is not evidence |
| Alfalfa | Not established | No canine source |
The two CAUTION rows are the only ones with a real percentage attached, and they are about mature plants: broccoli under ten percent of daily intake considered safe, above twenty-five potentially toxic. Take that as the shape of the risk rather than as a microgreen allowance, because the isothiocyanate content of a broccoli seedling has not been measured against the adult head.
How much
There is no established microgreen quantity for a dog. The broccoli figure above is the closest anything comes, and it is a mature-vegetable rule for one crop.
A dog does not need these. A complete diet is complete. Greens here are a topper, an enrichment, a way to use a tray that is about to bolt. That sets the sensible quantity better than any percentage would.
What nobody has established
- Any canine feeding study of any microgreen, at any stage.
- Whether isothiocyanate content in broccoli or kale at microgreen stage resembles the mature plant, which is what the only two numbers on this page rest on.
- Whether fagopyrin in buckwheat is present at microgreen stage at all, which is the difference between a real warning and an inherited one.
- Any allium dose at microgreen stage, in any species.
If a dog has eaten allium material, that is a call to a veterinarian rather than a wait, and the 15 to 30 g per kg figure is a threshold for signs and not a safe allowance below it.
The four verdicts on this page, and what each one is telling you
Hover or tap a card to highlight it.
Safe
A veterinary or ASPCA source clears it for dogs. Nothing here reaches it, and the sunflower listing people cite is a different species.
Caution
Allowed within a stated limit. Broccoli and kale, both on mature-plant guidance rather than on a microgreen dose.
Unsafe
A source says avoid, with a mechanism. Five crops: the three alliums, buckwheat and parsley.
Not established
Nobody credible has looked. Eight crops, and it is different from both safe and unsafe.
The terms on this page, in plain words
Tap a term to see what it means.
Heinz bodies. Clumps of damaged hemoglobin inside red blood cells, the signature of allium poisoning across species.
Sources
- Merck Veterinary Manual, Allium toxicosis - the canine mechanism and the 15 to 30 g/kg figure.
- VCA, onion, garlic, chive and leek toxicity in dogs - the same group, treated clinically.
- ASPCA, buckwheat - Fagopyrum, fagopyrin, toxic to dogs.
- ASPCA, parsley - furanocoumarins, toxic to dogs.
- ASPCA, sunflower - the non-toxic listing, which is H. angustifolius.
- AKC, Dr. Jerry Klein on kale - calcium oxalate and isothiocyanates, and the advice against regular treats.
Keep reading
Animals and microgreens
Can Cats Eat Microgreens?
Some yes, four unsafe. Parsley is ASPCA-listed toxic to cats and the alliums have a published feline dose, while greens are enrichment for a cat rather than nutrition.
Read Can Cats Eat Microgreens?Animals and microgreens
Can Guinea Pigs Eat Microgreens?
The one pet where microgreens have a real nutritional case, and it still does not hold. Merck needs 10 mg of vitamin C per kg per day; USDA measured 20.4 to 147 mg per 100 g across 25 microgreens.
Read Can Guinea Pigs Eat Microgreens?Animals and microgreens
Can Hamsters Eat Microgreens?
A teaspoon a day for a dwarf and a teaspoon or two for hamsters generally, inside a 10 percent ceiling. Plus the hoarding problem nobody warns you about, which is the real risk with wet food.
Read Can Hamsters Eat Microgreens?Animals and microgreens
Can Parrots and Pet Birds Eat Microgreens?
Yes, as part of the fresh food. But the hazard on your worktop is avocado, where 8.7 g of mashed fruit killed a budgerigar within 48 hours, and no microgreen has an avian dose at all.
Read Can Parrots and Pet Birds Eat Microgreens?