Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Is Weed Killer Safe for Cats? Vet-Reviewed Facts & FAQ

man spraying weed killer in a red container

Weed killers are ideal for keeping your lawn pristine, but are they safe for the kitties passing through? The answer is that it depends on the type of weed killer you’re using and how you use it. Some products are marked “pet safe,” but even these need to be used in a certain way to prevent harm to your furry friends. Read on to learn more.

divider cats oct 2024

Can Weed Killer Poison Cats?

Yes, especially if it’s not used according to the instructions. You can certainly find weed killers labeled “safe for pets” but with the caveat that they’re used as instructed.

For example, if the instructions say that a product is pet-safe as long as you wait 48 hours before letting your cat roam the area again, but you let your cat out before the product has fully dried, the product could end up on your cat’s fur, feet, or even in their mouth if they self-groom after getting product on their coat.

Toxic Ingredients

Some of the ingredients commonly found in weed killers that can cause toxicity if ingested include glyphosate, chlorophenoxy derivatives, ferrous sulfate, paraquat, and fatty acids like octanoic acid (caprylic acid), decanoic acid (capric acid), and nonanoic acid (pelargonic acid).

Products that need to be diluted with water before use are another risk factor, as these have higher concentrations of toxins compared with products that you simply spray on.

spraying weed killer outdoors
Image Credit: Daria Nipot, Shutterstock

Signs of Poisoning

Signs a cat has come into contact with or ingested toxic ingredients include eye irritation, skin irritation, respiratory problems, vomiting, diarrhea, lethargy, anorexia, pupil dilation, salivation, abdominal pain, mouth ulcers, and blood in the stool.

Signs and severity can vary depending on the toxin that was ingested and how much was ingested. Some cats get away with a minor stomach upset, whereas others experience more serious issues.

If you suspect poisoning, please get your cat checked by a vet right away and let them know what has or may have been ingested. This can help your vet determine the right course of action. If you think your cat may have walked in an area with herbicide, clean their paws with gentle soap and warm water straight away to reduce the risk of it being licked off.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

What About “Organic” or “Natural” Weed Killers?

Unfortunately, even if a product is labeled “organic” or “natural,” this doesn’t necessarily mean there’s no risk to your cat. These can still contain potentially poisonous ingredients like fatty acids, so it’s equally as important as it is with regular products to use “natural” or “organic” products only as directed.

Tips for Keeping Cats Safe

If your garden weeds are getting you down, here are some tips for tackling them while keeping your cat safe at the same time.

  • Always opt for pet-safe weed-killer products and follow the instructions on the package.
  • Chemical residue can linger on surfaces for 48 hours or even longer after application. Check the advised wait time on the packaging before you allow your cat access to the area, and consider exceeding it to be on the safe side.
  • Consider pulling weeds by hand, if possible, to make sure cats are completely safe.
  • Stick to pet-safe, ready-to-use products instead of concentrated products that you need to dilute.
  • When not using them, store weed-killing products where your cat can’t find them and knock them over.
rear-of-a-toyger-cat-lying-on-the-grass
Image Credit: Kutikova Ekaterina, Shutterstock

divider cats oct 2024

Final Thoughts

To recap, pet-safe weed killers are best if you have cats or dogs that spend time in the garden, but it’s imperative to use them as instructed and make sure you give them enough time to completely dry before letting pets out into the area.

While it’s unlikely that a cat would ingest a large amount of weed killer (the smell and taste would be enough to put them off), they can easily come into contact with it and lick it off their fur or paws while grooming, and this is where the danger lies.


Featured Image Credit: Dean Clarke, Shutterstock

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

100+ Sassy Cat Names: Ideas for Bold & Feisty Cats

We all know about the infamous “cattitude”—that confident posture and alluring strut only the sassiest cats have. Felines are notorious for having aloof...

We Chat With “Homer’s Odyssey” Author Gwen Cooper About Her Blind Cat’s Legacy

A couple of years ago, I (and a few million or so others) read Homer’s Odyssey, the best-selling memoir of Gwen Cooper’s life...

Cats in Crochet Thinking Caps: How Hats Are Helping Neurological Studies

Without the results of scientific research and experiments, the world would be filled with the ifs and maybes of untested hypotheses. Unfortunately, an...

Newborn Kitten Care 101: Guide & Care Sheet for a Healthy Kitty

The thought of looking after an adorable newborn kitten can be appealing, but it’s incredibly hard work! Whether you find yourself helping your...

More related

Why Do Cats Like to Sit on Plastic Bags? 5 Interesting Reasons & Vet-Reviewed Safety Tips

It happens almost every time you go to the grocery store: You arrive home with plastic bags in hand and are greeted happily...

3 DIY Tuna Pumpkin Cat Treat Recipes: Vet Approved Treats

We all love treats, and you can find several commercial cat treats for your kitty. But have you ever considered making your own?...

10 Paw-some Fiction Books About Cats in 2025: Our Fave Novels Starring Felines

For cat lovers, finding a book that involves felines as the main character can be difficult—books that are worth your time reading, that...

Can Cats Eat Marshmallows? Vet Approved Nutritional Facts & Risks

If you’re enjoying a cup of hot chocolate with marshmallows on top, or are feasting on mallows directly from the bag, it can...

Keep reading

What Do Cats Really Think About Hugs? Vet-Reviewed Facts & Preferences

Most of the time, cats are irresistible. I can’t help but want to give my cats a big squeeze when they’re doing something adorable like Hugo the Abominable Snowman talking about wanting to hug and squeeze Bugs Bunny. Some cats...

happy cat with closed eyes hugging owner

Feline Lower Urinary Tract Disease: Our Vet Explains the Causes, Signs & Treatments

Is your cat urinating frequently? Are they going outside of the litter box? These signs may be vague or quite prominent. Your veterinarian might refer to the cause as feline lower urinary tract disease. Let’s look at some of the...

Ginger cat in blue litter box

Why Does My Cat Wake Me Up at Night? 8 Vet-Reviewed Reasons & Solutions

Cats can have annoying habits, like scratching the furniture and climbing above the cabinets, but one of the most annoying has to be when they wake you up at night, especially when you have work in the morning. So, why...

ginger cat on bed at night near window

Are Cats Self-Aware? Do They Understand Mirrors & Their Self-Reflection? (Vet-Reviewed)

Self-awareness in animals is often seen as a sign of intelligence, and it is something that scientists have looked at for decades, not only in cats but also in virtually every species of animal. Despite what it might look like...

cat burp_Dimitris Vetsikas_Pixabay

Why Does My Cat Drink Water With Their Paw? 4 Vet-Verified Reasons

Cats drinking water with their paws is a common behavior, but it can be perplexing for owners. Many owners notice their cats drinking water from the water bowl using their furry paws like a little cup or paddle. It is...

cat drinking from faucet

10 Best Food for Cats With IBD in 2025 – Reviews & Top Picks

We all want to feed our cats the best food, but when they have irritable bowel disorder (IBD), finding it can be a bit of a challenge. Since simply switching their food can cause a flare-up, you want to get...

grey cat just finished eating

Why Does My Cat Wink at Me? 3 Vet-Verified Reasons for This Behavior

If you are like most cat owners, you are regularly surprised by your cat’s behavior. Cats are rarely predictable, at least until they get old and set in their ways. One quirky thing that some cats seem to do is...

A photo of a lazy Cat winking at the camera

Are Raid Fly Ribbons Poisonous to Cats? Vet Approved Facts & FAQ

It can be tricky to care for our pets while attempting to get rid of pests. If you have many bugs intruding on your home, finding the right way to repel or kill them without endangering your cats can be...

flies caught in a flycatcher tape