Tuesday, March 3, 2009

Size of Plants in Your Garden

By Reuben Garden

Colours can be used as garden features in their own right - edging a path with the blue and grey of catmint (Nepeta) or a rose border with the yellow-green of Alchemilla moths (lady's mantle) are good examples.

The overall shape and form of every plant must be taken into account. for they will largely determine the final effect of the planting, particularly the way it appears in winter. Height and spread can be used to advantage when you want to provide sentinel effects in borders or to highlight a gateway or path.

The ultimate size and shape of all mature plants can be predicted with sonic. accuracy. These dimensions may be reached within one or two years, as with perennials such as Acanthus spinosus (bear's breeches), or it may be many years or even generations before a plant reach- * es its maximum height and spread. The beautiful blue cedar, Cedrus libani ssp. atlantica 'Clauca Pendula', for example, will take generations to achieve its full height and spread, but it will need the space in which it can grow and develop.

In all the entries in the directory there is an indication of the average height and spread that is to be expected from any given plant over a given number of years. However, it is worth bearing in mind that a plant's development will always be influenced by the conditions in which it is grown.

Silver and grey plants, such as santolina (cotton lavender) and artemisias. arc the ideal foil for most other colours, and they can be introduced to create buffer zones between strong colours, such as reds and blues, and to provide somewhere for the eye to rest.

This may seem obvious, but many gardens, even those apparently well designed, do not look exciting or stimulating simply because the number and balance of the plants in them have not been thought through and acted upon.

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