d04dd710____Recycling___City_of_Toronto__Best_uses
[Type] Leaves [Features] Insulator; high in minerals; may mat or blow away if not shredded or composted; many are acidic (rhododendron, pine needles, oak, beech - best used on acid-loving plants like tomatoes and strawberries) [Sources] Commonly available [Best uses] 
Cools soil in summer; winter cover (apply after dormancy, remove or till into soil in the spring); (see above box on leaf mould)
Yard waste, lawns and composting - Overview - Garbage & Recycling | City of Toronto
Best uses