How to Root a Viburnum 'Robustum' Cutting in Water

Viburnum tinus "Robustum" is also known as roundleaf laurustinus. It is a moderately fast-growing evergreen shrub that reaches 6 to 12 feet in height with a spread of 3 to 6 feet. Robustum is hardy in United States Department of Agriculture zones 7 through 12. It grows well in full to partial sun and has white fragrant flowers in the spring that attract hummingbirds.

Pruning shears or a sharp knife
Rooting hormone

Instructions

- 1
  Examine the Robustum plant in the late spring to early summer to find the new soft wood.
- 2
  Cut off 4 to 5 inches of a 6- to 8-inch soft-wood stem. Make the cut right below the leaf node. Cut several stems because not all of them will root.
- 3
  Remove the lower leaves of the stem, but leave the top two to four leaves.
- 4
  Dip the cut end in water and shake off the excess water. Dip the wet end into rooting hormone and shake off the loose powder.
- 5
  Fill a small glass with water. Insert the end with rooting hormone into the glass of water. Choose a glass that is the same height as the lowest leaf of your stem cutting. Fill the glass so it is within 1/4 to 1/2 inch below the rim. Do not submerge the leaves in the water.
- 6
  Place the glass in a sunny location. It takes three weeks or longer for the roots to form. Change the water if it becomes green or has a bad odor.

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