Seaweed on a gravel yard
United Kingdom 
I live in Wiltshire on the side of a slight hill - we have water running off the fields after it rains [ heavy clay] which then flows away across a gravel yard.
After a wet period sea weed like vegetable matter appear on the surface of the gravel - there are no apparent roots or attachment.
During the dry summer days [ remember them] these plants shrivel and die away.
Does anyone know what type of plant it is and how to curb it ??
thks
William
9 Sep, 2008
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Water the whole area with solution of Armillatox 30mls. to 1 gallon of water. Covers 9 square yards in March and October or after heavy rain.
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9 Sep, 2008