Fragrant indoor plants are great to have as a natural air freshener. They can help remove pollutants from the air and filter carbon dioxide to oxygen. For houseplants, there are some sweet-smelling choices that are indoor plants and adaptable to indoor lighting, but they can be planted outside as well.
Arabian jasmine, Jasminum sambac, is from the olive family. It is a fragrant evergreen vine that works in container gardening and for indoor use. The vine has dark green leaves, some of which are in whorls. Flowers are tiny and white (maturing to pink), 1 inch wide, and in clusters. Fruits are black berries. Arabian jasmine can be grown in full sun or partial shade in any moist soil and can be propagated via semiripe cuttings. It is hardy in USDA hardiness zones 9 to 11.
Blue passionflower, Passiflora caerulea, from the passion flower family is also called deciduous passionflower or hardy passionflower. It is a fragrant drought-resistant perennial vine that attracts butterflies. It is good for container gardening and indoor use. It can get 30 feet long with lobed leaves. Flowers are white and purplish blue and bloom in the summer. They can get 4 inches wide. Fruits are orange and are produced in late summer or fall. The blue passionflower should be planted in loose, well-drained soil with full sun and propagated via seed or cuttings. It is hardy to USDA hardiness zones 8 to 11.
Gardenia, Gardenia augusta, is from the madder family. It is a fragrant evergreen shrub that is good for container gardening and indoor use. It can get 6 to 8 feet in height and width. Glossy leaves are leathery, and white flowers turn to yellow as they mature. The fragrance is very sweet smelling. This plant should be grown in moist, acidic soil that is well drained in sun to partial shade and propagated via cuttings. It is hardy to USDA hardiness zones 8 to 10.
Parsley, Petroselinum crispum, is from the carrot family. It is a fragrant annual that is good for container use or indoor gardening. It can be a butterfly attractor. It can get 1 foot tall and 2 feet wide. Leaves are bright green and flowers are small and yellow. The foliage can be edible (with a nutty flavor) and is fragrant. Parsley should be grown in acidic soil in full or partial sun and propagated via seed. It is hardy in temperatures of 50 to 70 degrees F (10-21 degrees C).