Test the soil with a testing kit to determine soil pH, following the testing procedure detailed in the kit's instructions. Viburnums require a soil pH between 5.5 and 6.5.
Spread a 2-inch layer of compost over the planting site. Add agricultural limestone in the amount indicated by the soil test, if applicable, to bring the soil into the proper pH range. Work the compost and limestone into the top 10 to 12 inches of soil.
Dig the planting hole with a shovel. Make the hole the same depth as the viburnum transplant's pot and twice as wide.
Lift the viburnum from the nursery pot. Set it in the prepared planting hole so the top of the root ball is even with the top of the surrounding soil.
Fill in the hole around the roots halfway. Water the soil thoroughly to settle it. Finish filling in the hole and water a second time.
Spread 4 to 6 inches of pine straw mulch on top the soil around the viburnum shrub. Pull back the straw to leave a 3-inch space between the mulch and the stem of the shrub.