Cordyline australis, commonly known as Cabbage Tree or New Zealand Cabbage Palm, is a hardy evergreen monocot tree native to New Zealand. The seeds germinate relatively easily without special pretreatment, typically between 28 to 90 days, with cold stratification improving uniformity. This species is known for its frost tolerance and is one of the hardiest Cordyline species for temperate climates.
Before sowing
Seeds germinate without pretreatment. Cold stratification for 4 weeks improves germination uniformity and timing. Optional warm water soak for 24 hours recommended.
Sowing
What to expect
Tips
Sow seeds onto moist, well-drained seed compost and cover thinly with sand or grit, pressing seeds lightly into substrate. Light is needed for germination, so do not cover completely. Maintain high humidity by covering with clear plastic. Keep substrate consistently moist but not waterlogged. Cold stratification for 4 weeks at 15°C will speed germination and provide more uniform results. Warm soaking for 24 hours before sowing is optional but beneficial. Germination can be slow; be patient as some seeds may take 3+ months. Once seedlings appear, provide bright, indirect light and maintain moisture. Transplant to individual pots when large enough to handle. Protect young plants from mice and provide frost protection in first winter outdoors.
Sources: Plant World Seeds, Chiltern Seeds, Royal Horticultural Society, PFAF Database, Canopy (NZ Seed Propagation), Sunshine Horticulture, BBC Gardeners World, North Carolina Extension, New Zealand Plant Conservation Network
