Freesias are not known for being the easiest bulb to grow. They are fussy about soil composition and weather. While you can grow them nearly year round in USDA zones 9 to 11, they will go dormant in the heat of the summer and will return in the fall.
Freesias grow well in daytime temperatures that are between 60 and 70 degrees Fahrenheit and should pop up within weeks of planting at those temperatures. If you live in a cooler climate, freesia corms can be planted in the spring. They need full sun and well-drained soil. The bulbs will flower approximately 12 weeks after planting.
Freesia bulbs can be grown inside in pots in the winter. Plant six to seven corms in a pot that measures about 6 inches across with the tips upright. Use well-drained potting mix and water it well so the water drains from the bottom. Foliage should appear within about 2 weeks.