Select an area for planting in full sun with well-draining soil.
Remove the top soil completely from the planting area. Dig a hole that is twice as deep as the lilac root system is long.
Mix a few handfulls of gravel and compost in with garden soil at the bottom of the hole.
Hold the planting upright in the center of the hole. Push garden soil into the hole around the roots and gently tamp it into place.
Fill in the hole entirely and tamp the top with a shovel or your feet. Pack the soil well.
Water the planting. Spread 2 to 3 inches of mulch around the lilacs.
Choose a sunny location with well-draining soil in early spring. Till or work the soil and clear any rocks.
Dig a 4 to 6 inch deep furrow in the tilled soil with a hoe.
Back fill the furrow, leaving a 3 inch deep row.
Lay tubers, roots down, in the row--6 to 8 inches apart. Cover with 2 inches of soil.