Description
Soils that retain good moisture and promote good drainage
Sugi is the national tree of Japan, usually planted around temples and shrines. In other parts of the world it is widely cultivated as ornamental because of the beautiful color of its foliage and its extraordinary size, forming a unique set.
Its wood is fragrant, reddish pink, light but very strong, waterproof and resistant to deterioration. It is widely used in japan for home building and interiors.
This giant of nature is fast growing and easy to grow.
Cryptomeria japônica is symmetrical, uniform and imposing, when planted together, form a beautiful screen of privacy and windbreak.
They can be grown in pots and make beautiful Christmas trees.
It is also much appreciated and highly valued in that region in the art of bonsai. One of the few conifers that regenerates after a cut and promotes new shoots.
Curiosities:
1894 Record – feudal lord who was too poor to offer a stone lantern at the funeral of the shogun tokugawa leyasu (1543-1616), applied for permission to plant a sugi avenue where future visitors could be protected from the heat and the sun. The offer has been accepted, and the avenue that still exists is over 65 km (40 miles) long and is today one of the wonders of the world, of such imposing grandeur, breathtaking from any mortal.
Germination Guide
🌍 Japan and China
Moderate
Cryptomeria japonica, commonly known as Japanese cedar or sugi, is a graceful evergreen conifer native to Japan and central/southern China. This important timber tree exhibits short dormancy that can be effectively broken with 2-3 weeks of cold stratification at 4°C. Seeds germinate within 3-9 weeks after stratification when maintained at warm temperatures around 15°C.
Germination
Germination time
Expect germination in
21 – 63 days
Temperature
Min 15°C
Ideal 15°C
Max 20°C
🌡️ Temperature alternation recommended
— Place in warm position after cold stratification to stimulate germination
Substrate moisture
💧 Medium
Seed Pre-treatment
-
💧
Soaking — 24 hours
Soak seeds in lukewarm water for 24 hours after cold stratification, before sowing
-
🔨
Hot water scarification
Soak seeds in room temperature water for 24 hours before stratification
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❄️
Cold stratification — 21 days at 4°C
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📋
Additional notes
Short cold stratification (2-3 weeks) is essential to break dormancy. Keep seeds moist but not waterlogged during stratification.
Substrate & Container
Recommended substrate
Well-draining seed compost or mixture of sand and potting soil
Recommended container
Seed trays, plug trays, or small pots with drainage holes
Growing Tips
Sow seeds 1/4 inch (6mm) deep and tamp soil lightly. Mulch the seed bed to maintain consistent moisture. Keep substrate moist but never waterlogged during germination. Ensure good air circulation to prevent damping off disease. Place seedlings in bright location after germination but shade from direct sun initially. Seedlings are robust and frost-hardy by 15-20 weeks; transplant to individual pots when large enough to handle. Germination requires patience—multiple winter cycles may occur naturally in cold climates.
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