Moss in the garden - how to deal with it?

[DIYNovice1979]

Hello,
We have lots of moss in the back garden. Can this indicate a drainage problem?

The grass is a bit damp and springy, should I be concerned this could be a bigger issue in future. The picture below gives you a rough idea of what my back garden looks like.

Thanks

 

[fourtytwo]

I use Iron sulphate powder mixed in a watering can, about a tablespoonfull per 10 Ltrs spread over about 2sqyds!!
Slows it down, turns it black so it is easier to rake out and burn.
Makes the grass green and grows like stink.