Picea jezoensis
Japanese spruce, Jezo spruce, Hokkaido spruce, Japanese fir, ezo-matsu: this majestic conifer comes from the cold forests of northern Japan and Sakhalin Island. Its flat needles have a distinctive feature that makes it immediately recognizable: dark green on top, they are marked with two white bands underneath, giving the foliage a silvery-blue sheen when the wind turns it over.
Characteristics:
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Blue-tinged foliage: blue-green needles with silvery undersides, dense and evergreen.
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Slender form: a regular conical silhouette, reaching 30 to 50 meters in its natural habitat.
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Remarkable hardiness: it tolerates temperatures down to -30 °C without difficulty.
Precautions:
- Plan for its mature spread: this is not a small-garden tree. Give it plenty of space, or train it as a bonsai if your land is limited.
- It dislikes hot, dry summers: cultivation is difficult in Mediterranean climates.
Sowing advice:
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Position: full sun to partial shade, in a cool location.
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Soil: cool to moist, deep, rather acidic, and well drained. Unlike many conifers, it appreciates soil moisture and even tolerates heavy, cool soils — it is a boreal forest tree. However, it dislikes summer drought and alkaline soils.
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Method: the seeds require 6 to 8 weeks of cold stratification. Then sow them in pots or a nursery in spring, using a light, well-drained potting mix. Keep the soil moist but not waterlogged and place them in partial shade until germination.
Planting advice:
- Transplant into the ground once the young plants are well rooted, using a deep pot to accommodate their root system.
- It is exceptionally well suited to bonsai, thanks to its short needles and fine branching — see our guide to creating a bonsai from a seed.
Care advice:
- Water regularly during the first few years and mulch around the base to retain soil moisture: this is the key to its success in our climates.
Beneficial pairings:
- It creates a beautiful Japanese garden scene with the Japanese maple, whose red autumn foliage contrasts with its persistent blue-green color, or with ferns planted at its base.
Value for biodiversity:
- Its dense, evergreen foliage provides winter shelter and nesting sites highly sought after by birds.
- Its winged seeds feed squirrels, crossbills, and tits.
- In ecological woodland planting, it is particularly suitable for cool, wet soils that few species tolerate.
Uses:
- An ornamental tree for large gardens and parks, avenues, windbreak hedges in cold regions, and bonsai. Its light, resonant wood is highly valued in Japanese joinery, particularly for instrument making.
Symbolism:
In Japanese culture, it symbolizes resilience in the face of cold and the wisdom of Hokkaido's ancient forests, where it forms almost untouched stands.
Harvesting your own seeds:
Harvest the hanging cones as soon as they turn brown, before they fully open, then let them dry somewhere warm and dry: their scales will naturally separate and release the winged seeds. See how to store your seeds.
Commitment to Quality: at SemiSauvage - Permaculture, we grow and select our seeds with respect for all living things as our guiding principle. Based near the Auvergne Volcanoes, we choose open-pollinated, non-hybrid varieties, tested for their germination rate, carefully sorted and packaged, with no chemical treatment. Our belief: to give gardeners back the ability to resow, year after year, seeds that truly belong to them.
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