Master gardener Chris Dawson visits a traditional colonial home that has an expansive backyard overlooking a lake. The front porch currently has cement pots with seasonal iron frames inserted into them for winter decoration. The homeowner would like to replace these with something that has a year-round appeal, such as an evergreen topiary. When selecting shrubs for topiary:
- Make sure the form of the shrub is appropriate for the style of topiary.
- Avoid shrubs that have gaps in foliage; it will be harder to create an even shape when pruning.
- Choose a shrub with a main central leader or trunk that is vertically straight and very strong.
Dawson plants 'Brody' juniper (Juniperus virginiana) in the pots. This shrub is actually an eastern red cedar that is well suited to topiary. It has a tight, columnar habit and a rich green color that turns to a sage color in fall and winter. This fragrant shrub is hardy in Zones 4-9.
Dawson recommends using a heavier potting medium when planting larger shrubs in pots. A mixture of potting soil, topsoil, peat moss and organic compost creates a medium with good weight, moisture retention and nutrient levels.