Plant Safety in Your Landscape: What You Should Know About Toxicity

At Liberty Landscape Supply, we believe your yard, garden, and your indoor plant collection should be sources of beauty and relaxation, not worry. Many plants naturally contain compounds that can cause mild discomfort or, in rare cases, more serious symptoms if eaten. This is simply part of how plants protect themselves in nature. However, it is important to keep perspective. Most children and pets are not in the habit of nibbling on random greenery, and when they do, a bitter taste or unusual texture usually stops them after the first bite. By understanding which plants may be more toxic, placing them thoughtfully, and taking a few simple precautions, you can confidently enjoy a diverse and vibrant mix of greenery in your home and garden without sacrificing peace of mind.

The Nature of Plant Toxicity

Plants have been perfecting the art of self-defense for millions of years. Since they cannot simply pack up and run away from grazing animals, they have developed natural tricks to stay off the menu. Some taste so bitter that one bite is enough to convince animals and people to move on. Others produce chemical compounds such as alkaloids, glycosides, and oxalates, which can cause anything from a mild to more serious effects. Some plants rely on physical barriers instead, with sharp spines, sticky sap, or fuzzy leaves that make them less appealing to touch or taste.

It is also important to understand that not all plants with defenses are truly toxic. Some are simply irritants. For example, poinsettias have earned an undeserved reputation for being deadly to cats when they are more likely to cause mild skin or stomach irritation than anything serious. Many common foods, such as potato skins, tomato leaves, and apple seeds, also contain small amounts of natural chemicals that would only be harmful in very large amounts. In most cases, it comes down to the dose, the specific part of the plant, and who is doing the nibbling.

Which Common Plants Are Known to Be Toxic

While it is fascinating to understand how plants defend themselves, most people simply want to know which ones to watch out for at home. Many beloved houseplants and landscape plants contain natural compounds that can be irritating or toxic if eaten. Indoors, the Dumb Cane (Dieffenbachia) is a popular choice for its tropical look, but chewing its leaves can cause burning and swelling. Outdoors, the Sago Palm is a dramatic, eye-catching plant, but just one or two of its seeds can be very dangerous for dogs.

These examples highlight why awareness matters. You do not need to avoid every plant with toxic properties—in fact, most landscapes and homes already include them without issue. With a little knowledge and some thoughtful placement, you can enjoy a vibrant mix of plants while keeping children, pets, and visitors safe. Here’s a chart of the most common toxic plants:

Plant	Common Use	Toxic Parts	Typical Effects if Ingested	Approximate Amount to Cause Symptoms*
Dieffenbachia (Dumb Cane)	Indoor houseplant	Leaves, stems	Burning sensation in mouth and throat, swelling, drooling	A few bites of a leaf
Pothos (Devil’s Ivy)	Indoor houseplant	Leaves, stems	Oral irritation, vomiting in pets	Chewing multiple leaves
Philodendron	Indoor houseplant	Leaves, stems	Oral irritation, swelling, drooling	Several leaves
Snake Plant	Indoor houseplant	Leaves	Nausea, vomiting	Several leaves or large sections
Aloe Vera	Indoor houseplant	Latex under leaf skin	Stomach upset, diarrhea in pets	Large portions of leaf skin or latex layer
Oleander	Outdoor landscape shrub	All parts	Nausea, vomiting, heart irregularities	Even a single leaf may cause symptoms in a child or pet
Foxglove	Outdoor garden border	Leaves, flowers	Can affect heart rhythm	A few bites of leaves or flowers
Azalea / Rhododendron	Outdoor evergreen shrub	Leaves, nectar	Vomiting, drooling in pets	Several leaves or flowers
Sago Palm	Outdoor tropical accent	All parts, especially seeds	Severe toxicity in dogs	Just one or two seeds can be dangerous
Daffodils	Outdoor spring bulb	Bulbs	Nausea, vomiting	One bulb or several flowers

Children, especially toddlers, experience the world with all their senses, and sometimes that includes tasting things they should not. While a curious child might take a nibble of a leaf or flower, most quickly discover that garden plants do not taste very good and are not worth a second bite. A watchful eye and a bit of guidance in play areas are the best ways to keep little ones safe.

Pets can also be curious, particularly dogs and cats that are young, energetic, or simply bored. Some will chew on leaves or flowers as a form of play, while others do it to get your attention. Certain breeds and individual animals are more likely to nibble than others, so it is wise to notice patterns and move tempting plants out of easy reach if needed.

Wildlife is a different story altogether. Birds, squirrels, and many insects have evolved to handle certain plant toxins without harm, which is why you might see them happily snacking on berries or flowers that are best left alone by people and pets.

A few simple precautions, such as planting potentially toxic species out of reach and teaching children to look but not taste, can go a long way in keeping your garden safe while still full of vibrant life and beauty.

Practical Steps to Reduce Risk

1. Plan Plant Placement Wisel: Think about where you place plants in your yard or inside your home. Position potentially toxic plants at the back of flower beds, higher up in decorative containers, or in areas that are less accessible to curious children and pets. For outdoor spaces, small fences or edging can help create subtle “no-go zones.” This simple step can make your landscape both beautiful and safe.

2. Create Safe Play Zones: If you have children or pets, dedicate certain parts of your garden or indoor plant display to non-toxic, pet-safe and child-safe plants. Good choices include sunflowers, marigolds, snapdragons, and ornamental grasses outdoors, or spider plants and parlor palms indoors. These add vibrant color and texture without any added worry.

3. Teach the Garden Rule: “Look, Don’t Taste”: Kids love to explore with their senses, so teaching them that plants are for looking, smelling, and touching—but not for eating—goes a long way. Show them the difference between safe edible plants like strawberries, mint, or basil, and ornamental plants that are only for decoration. This not only keeps them safe but also makes gardening a fun and educational family activity.

4. Watch for Unusual Interest: Some kids and pets have selective taste, and some are determined little rebels. If you notice repeated interest in a particular plant, especially one known to be toxic, consider moving it out of reach or swapping it for a safer option. A thriving garden is meant to be enjoyed, not survived.

By taking these steps, you can enjoy the best of both worlds: a thriving garden filled with beautiful plants and the peace of mind that your family, pets, and visiting wildlife are safe. A little awareness goes a long way toward creating a child-safe and pet-friendly landscape.

What to Do If a Child or Pet Ingests a Toxic Plant

Stay Calm. Panicking can frighten a child or pet and make the situation worse. Most plant ingestion cases are minor, so take a deep breath and focus on the next steps.
Remove any plant matter from the mouth.
Rinse the mouth or affected skin with water.
Monitor for symptoms like drooling, vomiting, diarrhea, rash, or unusual lethargy. Even mild symptoms can provide important clues to healthcare professionals or veterinarians.
Call for help:

Poison Control (U.S.): 1-800-222-1222
ASPCA Animal Poison Control: 1-888-426-4435

If you can, keep a sample of the plant for identification.

A Balanced Perspective

A safe garden or home doesn’t mean avoiding every plant with any level of toxicity. If we did that, we’d miss out on many benefits, from air purification provided by plants like sansevieria to the pollinator-friendly flowers that support bees and butterflies. In reality, most landscapes—from public parks to home gardens—include such plants without any issues. The key is awareness, thoughtful placement, and a little supervision. With these practices, your garden can be a beautiful, thriving space that welcomes people, pets, and pollinators alike.