Answer: Your fuchsia is probably F. arborescens, traditionally a big shrub, growing to about 18' tall. If it's been trained to a single-trunk, it will be difficult to make it revert to a multi-stemmed plant, even with judicious pruning. Since you have the option of removing and replacing them, I'd go ahead and do that. Pruning the tops will result in additional stem development there, but the trunk is likely to remain bare. It's a difficult decision but in this case I think I'd replace them with younger plants that can be trained into spectacular specimens.
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