Posted: 21/08/2015 at 08:27
When you say 'compost' do you mean the bagged multi-purpose compost that you can buy from garden centres and DIY stores?
I wouldn't use the above - I would use screened topsoil, with the addition of some well rotted farmyard manure and home-made garden compost or leafmould. If the last isn't available I'd get bags of 'soil conditioner' from garden centres.
Multi-purpose compost breaks down to dust very quickly -i n my experience it's really only suitable for short term planting in containers