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mariana seeds

Black Spruce Seeds ‘Picea Mariana’

Black Spruce Seeds ‘Picea Mariana’, get yourSeeds !

Family: Pinaceae

Kind: Picea

Species: Picea Mariana

  • Common name:
    • Black spruce
    • Spice Marial
    • Picea Mariana

Black spruce is a slow-growing tree that can grow on average 10 to 15 m in height and 15 to 25 cm in diameter. In suitable areas, it can exceed 30 m. In the tundra, it is usually reduced to a shrub state.

Its leaves are acicular, 20 mm long, stiff, rounded and dark bluish green. Its cones, which hang from the branches, measure about 25 mm, are ovoid, sharp and almost spherical when opened. They open little and stay on the tree.

It is during the winter that they release their seeds, which can remain in the cone for several years. The bark of the black spruce is thin, scaly, dark greyish brown.

Black spruce is perfect for bonsai. Under favourable conditions, it develops a right trunk appreciated in group plantations.

Stunted and dwarf edrs, which originate from northern regions, high peaks or peat bogs, are usually planted alone and shaped either in sloping, wind-beaten, semi-cascade or waterfall shape. The literate shape is also perfect.

Black spruce is often used in raft-style compositions.

Growth speed

Full sun, but needs shade from the midday sun in summer, otherwise its needles may turn brown.

These northern trees prefer cool temperatures, although small or young bonsai trees need frost protection.


The spruce trees are very wind-tolerant and enjoy good air circulation.

Temperature range

From -10c to 30c. It is a rustic shrub that can withstand bad weather as well as frosts up to -10oC.

Method of cultivation of bonsai Black spruce ‘Picea Mariana’

The frequencies, dates given are to be adapted according to the region of cultivation and the climate.

  • One watering can per week in the summer.
  • Need constant humidity.
  • Water continuously for the two years following planting. Beyond intervene during episodes of prolonged heat, bringing water to the foot of trees and not by scatmost.
  • Never allow the soil to dry out completely, especially in late August and September when future buds are forming. Water thoroughly, as the pot is quickly filled with fine roots.
  • Spray foliage often, even during dormant periods.
  • Feed your bonsai on a regular basis from early spring to late summer.
  • Every two weeks, in the spring and mid-fall, use liquid bonsai food or semi-powerful general-use fertilizer.
  • During the summer, spruce trees grow strongly and therefore require a high amount of nitrogen.
  • If the spines turn yellow, it indicates a lack of potassium that needs to be filled.

Transplantation is done in the summer, before the buds hatch. If the nascent leaf is taking shape, it is already too late. The roots can be removed as long as a portion of the soil clod can be kept intact. The roots should not be exposed to air and sunlight during repotting.

In general, every 3 or 4 years, from early to mid-spring, before new growth develops, or early fall. Older specimens (10 years old) can be repotted every 5 years.

Trim the roots by 1/3.

In general, an iced pot is a good choice because it retains moisture better. Efforts are being made to harmonize colour with the fall colour of the foliage. Dark blues, purples, purples and greys are the best effect.


Use a mixture of fast-draining soil, 1 part silt, 1 part peat, 1 part sharp sand, or use 1 part akadama and 1 part pumice stone.

In general, spruce should retain a decent-sized clod and may need to be planted in a deep pot to achieve this.

Protect from full sun for a few weeks after repotting.

Size is not required, but the branches may eventually be folded out of winter to stimulate the growth of new vigorous stems. Dead wood and intersecting branches should also be removed to maintain a beautiful harbour.

The buds appear from mid-April to mid-May. Pinch them when they are a soft green. The buds of the treetop should be reduced by 2/3, while those of the lower branches should be halved.

Do not use scissors, but pinch with your fingers by pulling and twisting the bud. When pruning, always leave 2.5 cm to 5 cm of branch near the trunk and cover the cut with squealing paste.

To shorten a branch, take care to prune it by leaving buds on the branch otherwise it may wither.

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Picea mariana (Black Spruce)


Picea mariana (Black Spruce) Seeds

Native to North America.

The Black spruce shares a similar range with the White spruce, growing in the northern temperate and boreal woods. It has a straight trunk with an irregular, narrow canopy and short, compact, drooping branches with upturned tips. Its silhouette makes it easy to distinguish from other spruce species. The needle-like leaves are a dark bluish green on the upper sides, paler green underneath. Seed cones are purple-brown in colour, egg-shaped and smaller than other spruces.

It prefers a sunny site or part shade with moist, well drained soil, but can tolerate a variety of soils.

Size: Height 40 to 60 ft; Width 8 to 12 ft.

Germination Instructions

Stratification: Provide about 30 to 45 days cold, moist stratification at 3° C (37° F) to 5° C (41° F).

  1. Soak seeds in water for 24 hours.
  2. Place seeds in sandwich bag(s) with a bit of damp sand or vermiculite to keep moist.
  3. Place the bag(s) with seeds in refrigerator for about 30 to 45 days.
  4. After the required time take the seeds out of the refrigerator and sow the seeds in pots 1/8 inch deep and cover lightly. Water gently so as not to wash away the seeds. Keep soil moist but not wet.

Picea mariana (Black Spruce) Description Picea mariana (Black Spruce) Seeds Native to North America. The Black spruce shares a similar range with the White spruce, growing in the