1. Lawn Damage
   As tleaves build up what they can actually do is mat together, this forms a barrier over the top of the grass which means that your lawn can’t breather. The following spring the full extent of the damage will be evident with bald patches.
2. Save Money
   There is another reason to collect leaves though and it can save you money. Leaves make an excellent addition to your compost heap, which means you can save cash next year on buying compost.
3. Save More Money
   If instead of compost you wanted mulch (there is a difference) you would need to start a separate pile for leaves. This is explained further in the article what to do with your fall leaves.
4. Safety
   On harder non-porous surfaces such as concrete, tarmac, block paved or a slabbed area decaying leaves can become a big hazard when they are wet. Layers and layers of wet compressed leaves are very slippy not just to people but also on sloping driveways.
5. Aesthetics
   Although seasonal leaf fall looks nice at first, it’s a bit like snow, after the first day and a bit of rain it all looks a bit brown and sludgy, nice.

Find out how to look after your lawn by collecting the leaves in this how to use a lawn sweeper.