- Freesias grow best outdoor in the garden where summers are hot and dry. That makes the plants go dormant. Cooler weather from fall to spring with ample rain in the winter yields flowers in spring.
- In regions with winters colder than 20 degrees, gardeners plant the corms in spring once danger of frost passes. The corms produce leaves and then yield flowers roughly 10 to 12 weeks after planting. In wet summer climates, dig up the corms once leaves yellow and replanted them in autumn.
- Freesia corms produce their flowers after exposure to cool nighttime temperatures. Where hardy outdoors, flowering naturally occurs in spring. If grown in containers or planted outdoors every spring, corms are either prechilled at 30 to 40 degrees or the plants are exposed to cool nights as the foliage grows heading into early summer.
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