Add approximately 8 to 10 inches of additional soil around the rose bush immediately after you plant it in the soil. Mound the soil carefully to cover the bud union and the center area of the stems, leaving just the tips of the stems protruding out from the soil.
Leave the soil on the rose bush for two to three weeks. Observe the rose bush during this time to notice when new growth begins.
Remove the soil from the rose bush when you detect new growth beginning from the stems protruding out from the soil. Direct a gentle spray from a garden hose over the soil to leave the plant growing at the proper depth -- with the bud union just below the soil level for northern regions or at the soil level for southern regions. Removing the soil with water will eliminate the chance of damaging the bush.