Answer: Champaca won't perform well in a container and probably will not flower if you keep it pruned to only 4-5 feet tall. I think you'd be happier with a dwarf shrub that produces fragrant flowers. Daphne odora, Mock Orange or even Japanese Snowball might be shrubs you'll want to consider.
The sour oranges were among the first citrus to be introduced to the Americas, where they became feral in areas of warm, humid tropical and subtropical climates. The sour oranges are principally used for marmalade, with specialty use in liqueurs and perfumes. In Texas, sour orange is the rootstock on which more than 99 percent of the industry is planted.
'Chinotto' is a myrtle-leaf orange closely related to the sour oranges that makes a very attractive ornamental. The tree is densely foliated, compact and nearly thornless with the same cold hardiness as sour orange. The fruit resembles a small orange with yellowish peel. It is acidic in flavor and seedy; the fruit stores very well on-tree and is used in preserves.
It's the nature of a sour orange to be acidic and sour; no amount of fertilizer will change the fruit and make it sweet.
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