Start with compost, add peat, perlite and fertilizer and mix well.

You can buy a big bale of compressed peat and large bag of perlite, depending on how much you need, these could last you quite a few seasons.

The fertilizer could be a slow release formula or a generic all purpose. I add more fertilizer depending on application ( hanging baskets for instance would get a handful more at planting time.

I just get in there with my garden gloved hands and give it a good mixing pulling out any large pieces that need more time to cook in the compost.

Your ratio should be about:

Compost= 60%

Peat= 30%

Perlite=10%

+ a few handfuls or more of fertilizer pending on size of mix.

For more info on composting visit: http://www.sowanddipity.com/the-dirt-on-comp...