Flower · Iridaceae
When to plant freesias
Freesias grow from corms and are valued for fragrant cut flowers. They need a suitable mild growing season; warm enough to avoid damaging frost does not necessarily mean cool enough for a good flowering display.
Hardy in USDA zones
9a to 11a
A winter-survival reference; heat, chill and drainage also matter.
Frost tolerance
Tender
How much cold the plant itself will take.
Choose a place for estimated dates and local climate checks.
Timing, in frost-relative terms
Freesias occupy their position for years. Check mature size, drainage, winter survival and cultivar requirements before choosing a planting window. Frost dates alone cannot tell you whether the plant will thrive, flower or fruit.
- Hardy in USDA zones 9a–11a.
Getting the timing right
Use a drained rooting medium and a sunny position appropriate to local conditions. Keep moisture available during leaf and flower growth without leaving corms in standing water. Choose a container deep enough for roots and support stems if the chosen variety needs it.
Frost tolerance
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.
Classified as tender, with a catalog cold-damage reference of -3°C (26.6°F)26.6°F (-3°C). Exposure duration, growth stage and acclimatisation change cold tolerance.
Before you plant freesias
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 13°C (55.4°F); the calendar estimates soil warmth from air temperatures and cannot measure your bed.
- Check the local overnight forecast before planting out. Delay planting or keep protection ready if frost is forecast, even after the historical last-frost date.
- Check mature size, drainage and cultivar suitability before choosing a permanent position. A suitable planting window does not guarantee long-term survival or fruiting.
Give freesias a mild, cool growing period
Use a drained rooting medium and a sunny position appropriate to local conditions. Keep moisture available during leaf and flower growth without leaving corms in standing water. Choose a container deep enough for roots and support stems if the chosen variety needs it.
Allow the leaves to complete growth after flowering. Where outdoor winter conditions are unsuitable, follow the supplier's lifting and storage advice for the corms. Small successive batches can be compared for flowering time, but very different temperatures may change the result more than a few days between plantings.
What to record this season
Which planting batch flowered well, and what temperatures occurred during its active growth? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.
Further reading: Freesia (Baboon Flower, Freesias) | North Carolina Extension Gardener Plant Toolbox . General crop guidance; local dates on this site are calculated separately. Source checked 19 September 2026 by Safe to Plant; this is not an expert review.
The reference describes plant identity and cultivation. Its regional calendar months and hardiness observations do not validate the calculated dates for another location. This reference covers the broader plant group; confirm the named form and its specific requirements with the supplier.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy