Blog Dollar Spot in Lawns: Where does it come from and what can be done? May 30, 2024

Dollar Spot in Lawns: Where does it come from and what can be done?

You take great pride in your lawn, investing time and effort to ensure it looks lush and green. However, one day you notice small, silver dollar-sized spots on your lawn, and upon closer inspection, you realize it's dollar spot disease. Dollar spot is a common turfgrass disease that affects many homeowners' lawns. Understanding where it comes from and what can be done to treat it can help you maintain a healthy and vibrant lawn.

Dollar spot is caused by a fungus known as Sclerotinia homeocarpa. This fungus thrives in warm, humid conditions, which are ideal for growth during the summer months. The disease often appears in lawns with lower nitrogen levels, moist conditions from watering in the evening, and poor air circulation. Additionally, stressed turf from drought, thatch build-up, or compaction is more susceptible to dollar spot infection.

To prevent and treat dollar spot in your lawn, consider the following steps:

1. Improve nitrogen levels: Fertilize your lawn regularly to maintain proper nitrogen levels. Nitrogen helps strengthen the turfgrass and makes it more resistant to diseases like dollar spot.

2. Water in the morning: Water your lawn early in the morning to allow the grass to dry out during the day. Avoid watering in the evening when moisture can linger and create a favorable environment for fungus to grow.

3. Improve air circulation: Trim back overhanging branches and shrubs to improve air circulation throughout your lawn. Good air circulation helps prevent the development and spread of dollar spot.

4. Reduce thatch build-up: Thatch is a layer of dead grass and roots that can harbor pests and diseases. Regularly dethatch your lawn to reduce the risk of dollar spot and other turfgrass diseases.

5. Use fungicides: If dollar spot has already infected your lawn, consider using fungicides to treat the affected areas. Follow the manufacturer's instructions carefully and apply the fungicide as directed. You may be able to fertilize and “grow it out” but it depends on the severity of the dollar spot disease

6. Consult with a lawn care professional: If you're unsure about how to handle dollar spot in your lawn or if the infection is severe, consult with a lawn care professional. They can assess the extent of the damage and recommend the best course of action to restore your lawn to health.

By understanding the causes of dollar spot and taking preventive measures, you can effectively manage this common turfgrass disease. With proper care and attention, you can enjoy a beautiful, disease-free lawn that enhances the curb appeal of your home. Remember, a healthy lawn starts with proactive lawn care practices and a commitment to maintaining your turfgrass's health and vitality.