Hi Jimbow, and a big
to All Things Plants.
What type of alpine plants are you growing? And what are your growing conditions/weather/soil like?
There are many alpine type plants that will do well in normal garden soil that is amended with forest type compost and gravel (small pea gravel/chicken grit).
I have raised beds filled with forest compost, sand and pea gravel. I also have some beds filled with sandy loam compost. Most plants are top dressed with a nice layer of chicken grit or pea gravel after planting. If you are using raised beds it will provide you with better drainage and it is easy to provide pockets of special growing conditions for individual plants with specific needs.