Can You Use Sulfur for Fleas in the Yard?

What It Is and Why It Works

• Sulfur is the 16th element on the periodic table. In powder form, it is a yellow substance used for different purposes, such as pest control. It is usually associated with a pungent smell, often similar to the smell of rotting eggs. However, actual sulfur in its base form has no odor. The smell comes when it mixes with oxygen. Sulfur does not kill fleas, but it does repel them. Fleas find the rotten-egg smell repulsive and stay away.

Sulfur Powders

• Spreading a thin layer of sulfur powder around your yard can repel fleas from the property. Utilize a fertilizer spreader to apply the powder to your property. Apply a thick enough layer that you can see the powder once applied, but not so thick that it completely covers the grass. Too much sulfur results in an unpleasant odor you can smell. It is safe for use in your garden as well as your lawn. Application of the powder helps repel other unwanted insects, such as aphids. Sulfur is not water soluble, so applications remain after rainstorms or when you water your lawn.

Precautions

• According to Cornell University, studies show that sulfur has little negative effective on the body. However, it can cause respiratory irritation when inhaled during application. For your protection, wear a respiratory mask when applying the powder to your yard. The mask also keeps the powder out of your mouth. Sulfur can cause a mild laxative effect from oral consumption.

Beyond the Yard

• Treating your yard alone is not enough to get rid of the fleas. You have to treat your pets as well. Otherwise, your flea-infested pet will release new fleas into the yard when it’s outside and continue bringing fleas into your home. One common cause of flea infestations in pets is a lowered immune system or nutritional deficiencies. An improved, high-nutrition diet and the additive of nutritional sulfur to your dogs food intake helps repel fleas. Sulfur bolsters your pet’s health by improving skin, coat and nails, and it also leaves a faint sulfur odor the fleas can smell. Speak to your pet’s vet to discuss the appropriate diet and adding sulfur supplements to your pet's daily routine.