Answer: Styrax is a nice choice and you can keep it at the height you require by pruning it back every few years. Other suggestions include Choisya ternata (an evergreen shrub that you can train into a tree). It reaches 10' in height and produces clusters of fragrant flowers in both spring and autumn. Dwarf citrus trees will produce fragrant blossoms and the added bonus of some fruit. A final suggestion is a dwarf weeping plum. The flowers are mildly fragrant. Hope the above information is useful!
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