If you have a very sunny spot, you can grow rosemary and lavender
indoors, especially if you have an unheated, or semi heated sun porch
which protects against winters full blast while allowing cool temps and
sharp temp drops at night. Patchouli is a nice indoor plant, peppers
are ornamental and lovely. Citrus trees, not only for their fruit, but
the oils in the leaves. Jasmine and hibiscus make good tea.
passionfruit vines smell heavenly, look wonderful, and the right kind
can have lovely tasting tart fruits. Miracle fruit makes even the
sourest stuff taste sweet...perfect for getting picky kids to drink,
say, grapefruit juice. Dragonfruit has georgeous flowers and a bland
but nutritious fruit that can be eaten or juiced...