Granular Pre-Emergent & Dog Safety

Granular pre-emergents can be safely used around dogs. However, this requires proper application, correct timing, and specific precautions. The main concern with these products is direct exposure to the granules before they are watered into the soil and fully absorbed.

Key Safety Takeaways

Common active ingredients in pre-emergents, such as Pendimethalin, often have a low toxicity rating from the Environmental Protection Agency (EPA). According to Evergreen Lawn & Landscape, Pendimethalin is a man-made chemical used primarily as a pre-emergent herbicide for grassy weeds.

The risk to dogs increases significantly with direct ingestion of the granules or prolonged skin contact before the product has been absorbed. Animal studies have shown adverse effects, such as cancer and thyroid problems, from high-dose exposure to certain chemicals like Pendimethalin, as noted by Evergreen Lawn & Landscape.

Liquid forms of pre-emergent require the turfgrass to be completely dry before dogs can re-enter the area. For granular forms, dogs should not be allowed on the lawn until the product has been thoroughly watered in and fully absorbed into the soil.

Dogs with longer coats are more susceptible to granular pieces getting stuck in their fur. This increases the chance of ingestion if the dog licks its coat.

Safe Application Checklist

Always read the product label thoroughly before application. Follow all manufacturer instructions regarding application rates, safety precautions, and re-entry times for pets and children. This is the most crucial step for safe use.

Ensure that all dogs, other pets, and children are completely off the lawn and out of the application area before you begin spreading the pre-emergent. This prevents immediate direct contact with the product.

Use a broadcast spreader to apply the granular pre-emergent evenly across your lawn. This helps avoid creating concentrated areas of granules, which could pose a higher risk if a dog were to encounter them.

After spreading the granules, water the lawn immediately and thoroughly. This dissolves the granules and helps move the active ingredients into the soil, where they can begin to work. Lawn Synergy emphasizes that watering in is critical for granular products.

Restrict access to the treated area until the product is completely dry and absorbed into the soil. This typically means keeping dogs off the lawn for 24-48 hours, but always refer to the specific product label for exact re-entry instructions.

Sweep up any granular pre-emergent that lands on hard surfaces like sidewalks, driveways, or patios. These areas do not absorb the product, leaving accessible granules that pets could ingest.

Store all pre-emergent products in their original containers, in a cool, dry place, and out of reach of pets and children. Secure storage prevents accidental exposure or ingestion.

Tools & Products

Granular pre-emergent products are widely available. Look for those containing active ingredients such as Pendimethalin, Prodiamine, or Dithiopyr, which are common and effective for preventing weed seeds from sprouting.

A broadcast spreader is essential for achieving an even and consistent application of granular pre-emergent. This tool helps distribute the pellets uniformly across your lawn, preventing over-application in certain spots.

A garden hose or a sprinkler system is necessary for immediately watering in the granular pre-emergent after application. Thorough watering ensures the granules dissolve and the active ingredients penetrate the soil effectively.

Risks & When to See a Vet

Ingestion of granular pre-emergent can lead to gastrointestinal upset in dogs. Symptoms may include vomiting, diarrhea, and lethargy. The severity often depends on the amount ingested.

Skin contact with unabsorbed granules can cause irritation, redness, and itching. This is particularly true if the granules become trapped in a dog's fur, leading to prolonged exposure.

If granules come into contact with a dog's eyes, it can cause irritation and redness. Flushing the eyes with water immediately can help mitigate the effects.

If your dog exhibits any concerning symptoms after potential exposure, contact your veterinarian or an emergency animal hospital immediately. Symptoms to watch for include persistent vomiting, severe lethargy, difficulty breathing, or a noticeable skin rash. It is helpful to bring the product label with you to the vet, as it provides crucial information about the chemicals involved.