Answer: The situation you describe doesn't sound very plant-friendly! Anything vigorous enough to cope with poor soil and competition from eucalyptus roots will need at least annual pruning to keep it in shape. Lonicera (honeysuckle), forsythia (trained through the wire), or climbing hydrangea (Hydrangea anomala) are plants I've had success with under difficult circumstances. They each need pinching and pruning in the juvenile stages, and annual pruning to keep them inbounds, but are otherwise good additions to the landscape. Hope one of these plants appeals to you!
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