Spring Garden Hazards for Dogs and Cats: Bulbs, Slug Bait and Fertilisers
Spring is when dogs rediscover the garden. The soil is soft, the bulbs you planted in autumn are sitting an inch below the surface, and a bag of something that smells like meat is leaning against the shed. For a dog, that combination is an invitation. For an owner, it is a short list of specific risks worth knowing before the first warm weekend of the year.
This guide covers three groups of spring garden hazards: bulbs and early flowers, slug and snail bait, and the fertilisers and mulches that smell appealing to pets. It is general information compiled by the site editors from veterinary and poison-centre sources. It is not veterinary advice, and the editors are not veterinarians. If your pet has already eaten something, ring a professional first and read the rest later.
Emergency numbers
- ASPCA Animal Poison Control Center (US): +1 888-426-4435
- Pet Poison Helpline (US and Canada): +1 855-764-7661
- Animal PoisonLine (UK): 01202 509000
Some of these services charge a fee. Your regular vet or an out-of-hours emergency clinic is always a valid first call. Keep the product packaging, or a photo of the plant and its label, and note roughly how much is missing and when. Our guide to the first hour after a suspected poisoning explains what to have ready.
Spring bulbs: where the toxin sits
With most bulb plants, the bulb itself holds the highest concentration of the harmful compounds. That is why the danger is greatest at two moments: planting time, when a dog digs up freshly set bulbs, and the days after a delivery of bulbs in a paper sack.
Daffodils and narcissus
Daffodils contain lycorine, an alkaloid, and calcium oxalate crystals in the sap. The ASPCA lists them as toxic to dogs, cats and horses. Eating a small amount of leaf or flower typically causes drooling, vomiting and diarrhoea. Larger amounts, particularly of bulb, are listed as capable of causing more serious effects such as an abnormal heart rhythm and low blood pressure. The water in a vase of cut daffodils also contains sap, so it is not a safe drink for a curious cat. Our bulb toxin tool explains the compounds involved.
Tulips and hyacinths
Tulips and hyacinths contain related compounds (tulipalin in tulips; alkaloids and oxalates in hyacinths) concentrated in the bulb. The ASPCA lists both as toxic. Typical signs after chewing are drooling, vomiting and diarrhoea. A dog that swallows a quantity of bulbs risks more significant illness, and bulbs can also be a mechanical problem simply because they are hard and rounded.
Autumn crocus and its lookalikes
The name causes more confusion here than anywhere. The autumn crocus (Colchicum autumnale, also called meadow saffron) is a different plant from the spring-flowering Crocus species sold in garden centres. Autumn crocus contains colchicine, which the ASPCA lists as a serious toxin affecting several organ systems, and it can be fatal. Ordinary spring crocuses are generally associated with milder stomach upset, but some Crocus-like plants are sold under confusing names, so check the Latin name on the label. See our autumn crocus entry for more.
Other early-season plants worth checking
- Snowdrops: the bulbs are the main concern, with vomiting and diarrhoea after ingestion.
- Lily of the valley: contains cardiac glycosides that can affect the heart rhythm; a more serious plant than its delicate appearance suggests.
- Lilies in spring bouquets and pots: any true lily is a kidney emergency for cats; read our lilies and cats guide.
- Rhododendron and azalea: flower in spring and contain grayanotoxins; see the rhododendron entry.
- Yew: clippings and berries are dangerous; the yew entry explains why.
The ASPCA plant database is a good place to confirm a specific plant by Latin name.
Slug and snail bait
Slug pellets are attractive to dogs, which is part of what makes them dangerous. They are often brightly coloured blue-green or tinted, they are small enough to lick off the ground, and manufacturers have historically included flavourings. The active ingredient is the important part.
Metaldehyde
Metaldehyde is a neurotoxic molluscicide. In pets, ingestion can lead to drooling, vomiting, agitation, tremors, a raised body temperature and seizures. Veterinary sources describe no specific antidote, so treatment is supportive, and speed matters. Because the effects can start within hours, waiting to see whether symptoms develop is a poor strategy. Our metaldehyde tool gives background on how exposure is assessed.
The legal position differs by country:
- Great Britain: the UK government announced a ban on outdoor use of metaldehyde slug pellets, and outdoor use became unlawful from 31 March 2022 (use in permanent greenhouses was treated differently). The stated reasons were risks to wildlife, particularly birds and mammals, rather than pets. The government announcement is on the Defra media blog. Check current rules with the Health and Safety Executive before relying on this summary.
- United States: metaldehyde products have been sold for garden use. Read the label and look up the active ingredient before you buy.
Even in Britain, old tins can linger in sheds and garages. A tin bought years ago poisons a dog as effectively as one bought yesterday. If you find one, do not scatter it. Local authority household waste sites commonly take pesticides; ring yours for instructions.
Iron phosphate (ferric phosphate)
Most garden centres now promote iron phosphate pellets as the alternative. They are generally regarded as less hazardous to pets than metaldehyde, but that is not the same as harmless. Eating a large amount can cause vomiting and diarrhoea, and the iron can cause more serious problems in significant quantities. Pet Poison Helpline and similar services still ask owners to call after a dog eats a mouthful. Treat these as products to keep out of reach, not as treats.
Safer slug control
- Water in the morning rather than evening so the soil surface is dry at night.
- Collect slugs by torchlight and relocate them.
- Use physical barriers, such as copper tape around pots, as a supplement rather than a guarantee.
- Grow robust varieties rather than seedlings that slugs prefer.
- Where you use pellets, scatter sparingly in plant bases, not in heaps, and keep dogs away from treated areas until the label says otherwise.
Fertilisers, mulches and compost
The category that catches people off guard is anything made from animal by-products.
- Bone meal and blood meal. These smell like food. Veterinary poison services report that dogs eat them in quantity and can develop vomiting, diarrhoea and in some cases pancreatitis, and bone meal can form a hard mass in the stomach. Store bags in a closed container, and water the product in thoroughly after use.
- Rose and general fertilisers with added iron or insecticide. Some contain systemic insecticides. Check the label for organophosphates, which are covered in our organophosphate entry.
- Cocoa shell mulch. It smells of chocolate and contains theobromine. See the theobromine tool and our guide to chocolate toxicity in dogs.
- Compost bins. Mouldy food waste may carry tremor-causing mycotoxins. Cover or enclose the bin.
- Weed killer and lawn feed. Follow label re-entry times for pets, and keep dogs off wet treated grass.
A spring checklist
- Plant bulbs where dogs cannot dig, or cover beds with wire mesh or chicken wire until shoots appear.
- Store bulbs, fertiliser, slug bait and pesticides above dog height in a closed, lockable cupboard.
- Check labels for the active ingredient, not just the brand name.
- Throw away old metaldehyde via your local hazardous waste service.
- Put cut flowers where cats cannot reach, and ask florists to omit lilies.
- Photograph plant tags and fertiliser packaging, and keep them for the vet.
- Supervise puppies in the garden for the first spring they see it.
Signs to act on
Ring a vet or poison service if your pet shows any of these after time in the garden:
- Tremors, twitching, stiffness, or seizures
- Repeated vomiting or bloody diarrhoea
- Heavy drooling, pawing at the mouth, or swelling of the face
- Unusual agitation, panting, or a hot body
- Collapse, weakness, or an irregular heartbeat
Do not induce vomiting at home unless a professional has told you to. With convulsing or sleepy animals, it can be dangerous.
What to tell the vet or helpline
A fast, clear description shortens the call and helps the person on the other end judge risk. Have these facts ready before you dial, and write them down if you are shaking.
- Your pet's species, breed, age and approximate weight.
- The exact product or plant: the brand and active ingredient from the packaging, or the Latin name and a photo.
- How much could have been eaten, such as a torn corner of a bag or a handful of bulbs missing from a tray, and how long ago.
- Any signs so far, even small ones, and whether your pet has other health conditions or takes regular medication.
- Whether the animal has already vomited, and whether anything was given at home.
Bring the packaging with you if you are asked to go to a clinic. Product details such as concentration are often what determine the plan, and they are printed on the label.
Common questions
Is only the bulb dangerous?
The bulb usually carries the highest amount, but leaves, flowers and sap of many bulbs also cause illness. Autumn crocus is dangerous in every part.
My dog ate one daffodil leaf. Should I worry?
A single nibble more often leads to mild stomach upset than to anything severe, but the outcome depends on the dog's size and what part was eaten. Phone for advice rather than guessing.
Are pellets that say "pet safe" or "wildlife friendly" really safe?
Those phrases are marketing, not a guarantee. Look for the active ingredient, then treat any pellet as something pets should not eat.
Sources
- ASPCA: Daffodil
- ASPCA: Tulip
- ASPCA: Toxic and Non-Toxic Plants
- Defra media blog: Ban on the use of metaldehyde announced
- Pet Poison Helpline
Related calculators
More guides
- Christmas and Holiday Hazards for Pets: Food, Plants, Tinsel and More
- A Room-by-Room Pet-Proofing Checklist for Dogs and Cats
- Snake Bites in Dogs: What to Do in the US and the UK
- Toxic vs Pet-Safe Houseplants: A Practical Guide for Dog and Cat Owners
- Antifreeze and Pets: Ethylene Glycol, the Sweet Poison in the Garage
Not veterinary advice. The authors are not veterinarians. If your pet may have eaten something toxic, call your vet or a pet poison line now: ASPCA Animal Poison Control (US) +1 888-426-4435, Pet Poison Helpline (US/Canada) +1 855-764-7661, Animal PoisonLine (UK) 01202 509000. Fees may apply. Spotted a mistake? Email huhuwen09@gmail.com with the page address and we will check and correct it.