Freesias are winter hardy in zones 8 and above. Many gardeners in cooler climates plant them in the spring after all chances of frost have passed, and then grow them as annuals. They can be grown in containers or in the ground. Plant the corms 1 inch deep. Allow actively growing plants to dry slightly between waterings and use a liquid fertilizer once flower spikes appear. The flower heads are removed when they start to fade. Some support may be needed. Freesia prefers cool temperatures, ideally in the 50 to 60 degree F range.
Use caution with oxalis bulbs--some can be quite invasive once established. Oxalis is the largest genus in the wood sorrel family with over 500 species. The leaves of most Oxalis usually have three leaflets and are shamrock-like in appearance. Hardiness zones vary by species. Most require full sun and evenly moist soil when actively growing. Dormant plants are kept drier. Use fertilizer once or twice a year on actively growing plants. Bulbous types are planted in the fall where winter hardy. When growing, move it to its regular growing area. Propagation is by offsets removed at planting time or by root division.
Freesia is hardy to 20 degrees F, so it is a houseplant in many areas. USDA plant database shows Oxalis widely distributed in most states. Both plants are planted shallow, about 1 inch deep. Both plants are propagated by corm or bulb division and freely eject viable seed. Oxalis can be considered aggressive weeds in turfgrasses in some southern areas.
