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Griselinia littoralis, Olearia macrodonta, Brachyglottis ‘Sunshine’) that can be controlled/shaped by early summer pruning, their taller shoots tied to the trellis to provide coverage. Easier still would be exposure-tolerant evergreens (e.g. Evergreen climber Trachelospermum jasminoides (on Rachel’s “wanted” list) when grown in containers is relatively slow-growing and manageable, but may not enjoy the site.Each container of the size above should house a maximum of two shrubs or climbers, to allow sufficient root space for proper growth.Limiting the planting to two to three evergreen species will look smarter.The following may help, bearing in mind that this will always be a difficult, high maintenance project. The current mix of clumps of thrift, small clematises and scrambling variegated euonymus does not work, and she asks for ideas. The rather exposed site gets afternoon sun. Rachel Evans, in her attempts to form an attractive defining barrier between her and next door’s block-paved drive, has come up against an oh-so-common problem – namely, how to achieve an attractive, at least partially evergreen, thicket in containers (four of them in a row, each 3ft/1m long and barely deeper than most window-boxes), and each with its own metre-high backing trellis. The subject of garden boundaries rears its head over the top of the trellis again.
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