Cut off the flower heads once all the buds have produced flowers and after the flowers begin to wilt. Trim off the flower head but leave the remaining stalk in place.
Set the pot in an area that receives bright, all-day light, such as near a south-facing window. The leaves need plenty of sunlight after flowering to produce and store the necessary nutrients for the following year's blooming period.
Fertilize the freesias every two weeks with a soluble houseplant fertilizer. Apply the fertilizer at the rate indicated on the package.
Water the flowers when the top inch of soil in the pot feels dry. Empty the drainage saucer under the pot after each irrigation.
Cut back the foliage in late spring once it yellows and dies back on its own. Remove the foliage at the soil surface.
Store the pots in a dark 50 degree Fahrenheit location until you regrow the corms in late summer or early fall. Place the pots on their side during storage.