I do not have an exact recipe but typically I would mix 2 or 3 bags of "compost with cow manure", a bag of either plain sand or potting soil with a high sand content, and a bag of fine mulch "hardwood fines" and add about a pint of fertilizer. This is mixed in a wheelbarrow as evenly as possible. The hardwood fines mulch which is stocked by Lowe's in my area is probably 75% rotted which makes the mix sort of light and fluffy. All this goes into a raised bed at least 8 inches deep. It does settle rather quickly so it needs to be compacted as well as mounded before planting. Hope this helps.
My rosea this morning. The blossom is a true rose color and looks great alongside the red fern leafs.
