Fill a 6-inch diameter pot half full with moistened potting soil two weeks before the last expected spring frost. Set the corm on top the soil, adjusting the soil's depth as necessary, so the bottom of the corm sits 5 inches beneath the rim of the pot. Fill the pot the rest of the way with moistened potting soil.
Set the pot in a sunny, 60 to 70 degree Fahrenheit location. Water the soil when it begins to feel dry, keeping it evenly moistened at all times.
Transplant the corm outdoors to a well-drained, full sun garden bed after frost danger has passed and after the soil in the bed warms to at least 60 degrees Fahrenheit.
Dig a planting hole that is as deep as the freesia pot, using a trowel. Make the hole larger than the width of the pot.
Lift the freesia from the pot. Set it inside the planting hole. The bottom of the corm must sit 5 inches beneath the soil surface. Space freesia plants 4 inches apart.
Fill in the holes with soil, firming the soil surface around the base of each freesia with your hands. Water the bed thoroughly after transplanting.