Is Fertilizer (Lawn & Garden) Toxic to Cats and Dogs?
Lawn and garden fertilizers are moderately toxic to both cats and dogs — granules and treated grass cause vomiting and diarrhea, while blood/bone meal add obstruction and pancreatitis risk.
Can cause real harm — call a vet for guidance.
Can cause real harm — call a vet for guidance.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Fertilizer (Lawn & Garden)?
Lawn and garden fertilizers are moderately toxic to both cats and dogs — granules and treated grass cause vomiting and diarrhea, while blood/bone meal add obstruction and pancreatitis risk.
Also known as: lawn fertilizer, plant food, blood meal, bone meal, miracle gro, npk fertilizer, garden fertilizer, grass fertilizer, fish emulsion, rose food.
Symptoms to Watch For
🐕 In Dogs
- Drooling, vomiting, and diarrhea within hours of eating granules or treated grass
- Mouth and skin irritation from contact with treated areas
- Abdominal pain and lethargy
- Tremors, bloody vomiting, or pancreatitis with blood meal/bone meal or iron-heavy products
- Bowel obstruction risk from clumps of bone meal eaten in quantity
🐈 In Cats
- Drooling and vomiting after licking treated grass or granules
- Mouth irritation and increased thirst
- Diarrhea and lethargy
- Tremors with iron-heavy or combination products
What to Do If Ingested
- Remove the pet from the treated area and wipe paws and fur.
- Rinse the mouth and offer fresh water.
- Note the product name and take a photo of the label (iron and herbicide content matter).
- Call a vet or poison hotline if more than a small lick occurred.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting. Have a cat? Run the Pet Poison Triage Wizard for cat-specific steps.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- A meaningful amount of granules, blood meal, or bone meal was eaten
- Repeated vomiting, bloody stool, or abdominal pain
- Tremors, wobbliness, or collapse
- Loss of appetite or constipation a day later (obstruction signs)
Frequently Asked Questions
Frequently Asked Questions
How long after fertilizing is the lawn safe for pets?
Follow the product label, but the standard rule is to keep pets off until the product is watered in and fully dry — typically 24 to 72 hours. Granules sitting loose on the grass are the exposure risk; once they have dissolved or been washed into the soil, residue is much lower. Bag and store the leftover product immediately — dogs find the smell of blood meal and fish emulsion genuinely appealing.
Why are blood meal and bone meal singled out?
Because dogs love the smell — they are dried animal products, and dogs eat them by the mouthful. Blood meal is nitrogen-rich and causes vomiting, diarrhea, and in large amounts pancreatitis and iron overload. Bone meal forms chalky clumps that can cement into an intestinal obstruction requiring surgery. If your dog treats the garden bag as a snack, switch to a slow-release product stored in a sealed bin.
Are "organic" fertilizers safer?
For the environment often yes, but not for a dog that eats them — organic products are often made of blood meal, bone meal, fish meal, and feather meal, which are more attractive to eat than synthetic granules, and they carry the obstruction and pancreatitis risks above. Synthetic products can also include herbicides and iron. The label matters more than the word "organic": check the ingredients and the pet-reentry interval.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-10-16