Q&A – What is this slime growing on my gravel driveway?
Question:
There is some type of slime or fungus growing on my limestone driveway. I was hoping you could tell me what it might be and what causes it. It is dry most of the time but when it rains it swells up and turns a dark greenish color and is slimy. It is also spreading. I don't know how to treat it because I don't know what it is
Answer:
This is Nostoc algae. It is also known as witches butter or star jelly. It like places where there is compact soils and poor drainage (like a driveway). It can dry up between rains but then rehydrates and continues to grow. It does not need to be treated because it will go away with a long spell of hot dry weather. If you do want to treat you can use a fungicide that controls algae and moss that uses potassium salts or fatty acids.
Related Videos:
Nostoc
Mixing and Applying Fungicide
Related Resources:
Nostoc: A green, jelly-like substance growing in lawns
A Continuation of Nostoc Blue - Green Algae Control Solutions In Nurseries
There is some type of slime or fungus growing on my limestone driveway. I was hoping you could tell me what it might be and what causes it. It is dry most of the time but when it rains it swells up and turns a dark greenish color and is slimy. It is also spreading. I don't know how to treat it because I don't know what it is
Answer:
This is Nostoc algae. It is also known as witches butter or star jelly. It like places where there is compact soils and poor drainage (like a driveway). It can dry up between rains but then rehydrates and continues to grow. It does not need to be treated because it will go away with a long spell of hot dry weather. If you do want to treat you can use a fungicide that controls algae and moss that uses potassium salts or fatty acids.
Related Videos:
Nostoc
Mixing and Applying Fungicide
Related Resources:
Nostoc: A green, jelly-like substance growing in lawns
A Continuation of Nostoc Blue - Green Algae Control Solutions In Nurseries