Top o’ the mornin’ to all ye lads and lasses. Today is St. Patrick’s Day – a good day to celebrate all things green don’t ya think? Not so green ’round here though is it?
Well soon enough my friends, soon enough. Spring will come – in the meantime we still have a ways to go in our study of plant form, texture and colour. I’ll try to have you ready in time for the frenetic plant-shopping sprees that will begin in the next month or so.
A grafted standard is essentially a shrub grafted onto a stem or “standard” – also called a top-graft, the overall effect is that of a stick with a ball on top. If that sounds disparaging, it isn’t intended to – they’re actually very attractive additions to the landscape. Many different shrubs can be grafted this way, but the ones that work best are those that are smallish with a naturally round(ish) growth habit – this means minimal pruning will be required. Dwarf Korean lilac, globe spruce and globe Caragana are all commonly used and available in grafted form at most nurseries.
Depending on the particular shrub used, the height of the standard, and how it is pruned, this form can have several landscape or garden applications. They work well as linear plantings to emphasize a design line – both curving and straight design lines can be planted this way.
If they’re tallish and not too wide, two top-grafted standards on either side of an entryway, can make an attractive frame – not so much, if they’re short and stout though; these are best used as single specimens.
I find this form to be especially useful when designing certain theme gardens, most notably Mediterranean, Colonial and English Landscape Style.
As a general rule grafted standards don’t work in groups (unless planted in a row along a design line), but there are of course exceptions to every rule – see below.
Topiary is the practice of shearing woody plant material into… well, just about any shape you can imagine. My intention here isn’t to instruct you in the art of plant sculpture (my attempt at topiary would likely result in something akin to Richard Dreyfuss’s infamous mashed potato mountain), but rather to instruct you in their appropriate use. Of course a shrub can be sculpted into a mouse, a monkey, or a monster but the most common forms you’ll find at a nursery are standards, pom–poms, poodle tiers and spirals.
These are created by pruning a large shrub, which is naturally multi-stemmed, into a single-stem, tree-like form with a ball-shaped top. They look pretty much the same as a grafted standard – in fact now that I think of it, a couple of the photos in this post were of standards I just assumed were grafted, but they could well have been shrubs that had been pruned to a single trunk, rather than grafted. No matter, their application is exactly the same.
Pom-pom topiary is formed from a shrub that is pruned into several main stems with a “ball” of foliage at the end of each. This is a very unique form and should be used as a lone specimen – this means only one in your entire composition. No grouping, repeating, planting in a row, or framing – they’re the wrong shape for any of these applications.
Pom-poms, especially pines, can lend an Asian feel to a garden composition because they, like bonsai, are part of the Japanese aesthetic. Topiary and bonsai are used to create Reduced Scale, an important Japanese design principle which refers to the reproduction in miniature, of scenes in nature – bonsai and topiary are used to fashion “trees”, but in much-reduced scale. For this reason, it is acceptable to use more than one of these forms in a Japanese garden composition.
This form is a single trunk with two or more individual balls of foliage along its length. Poodle tiers are fairly upright specimens, which makes them an appropriate choice for framing views and entryways. They also make excellent single features. Like topiary standards and grafted standards, poodle tiers are especially suited to Mediterranean style gardens, formal Colonial style gardens and English Landscape gardens.
Spiral topiary is an upright form that has been pruned into a spiral or corkscrew shape. These forms have the same application as poodle tiers and standards – they’re elegant as single specimens, or repeated sequentially along a design line, are suitable for framing, and are fine additions to theme gardens like Colonial, Mediterranean or English Landscape.
In our climate most garden topiary is Juniperus chinensis, Juniperus scopulorum or Juniperus virginiana, as well as several Pinus species. In warmer climes, Boxwood, Yew, False Cypress, Rosemary and Bay Laurel are used. These are often available as potted annuals for us Northern gardeners, and given a sunny window, they might overwinter indoors.
Topiary and grafted standards present very strong form in the landscape – suitably sited, they will bring style and sophistication to your garden.Happy St. Pat’s Day – just think green. Sue