I do not see many horse chestnuts in home landscapes and your tree is a beautiful specimen. It appears that your tree is suffering from a common fungal disease called horse chestnut leaf blotch.

Leaves: Deciduous; oppositely arranged; palmately compound leaves; 5 obovate leaflets with lobed, serrate margins. Twigs and buds: Glabrous; stout; reddish-brown; have prominent horse-shoe-shaped leaf ...

About a century ago the American chestnut tree was attacked by the introduced fungal pathogen (Cryphonectria parasitica). This fungus drove the chestnut to functional extinction. Now, scientists at ...

Horse chestnut is a tree that produces spiny-shelled fruits containing seeds, known as conkers. These may have some health benefits, for instance in treating varicose veins and hemorrhoids. However, ...