The White Pine Bonsai: Feminine Elegance (Goyomatsu)

The Japanese White Pine(Pinus parvifolia or pentaphylla) is known in Japan as "Goyomatsu." If the Black Pine is the "King" (masculine strength), the White Pine is the "Queen" (feminine elegance). It is immediately distinguished by its needles gathered in clusters of five (hence "pentaphylla"), which are short, soft and bluish-green in color with a silvery stripe inside. It is a refined, slower-growing and more compact tree than the Black Pine, much beloved for its ability to create dense, flat stands of outstanding beauty.

Origin & species

Native to the mountains of Japan, it is a tree that often grows at high altitudes or on rocky terrain. This origin makes it extremely cold-hardy. The most common and popular variety in bonsai is the Miyajima (often grafted onto Black Pine to give vigor), famous for its short needles and horizontal branch growth.

Exposure and Microclimate

It likes full sun and open air.
Sun exposure (at least 4-6 hours direct) is necessary to maintain blue needle color and prevent fungal diseases. However, compared to the Black Pine, it tolerates half-shade a little better in very hot regions, as its needles are more delicate and can burn in the scorching August sun if the plant is in a small pot.

Watering

White Pine fears waterlogging more than anything else.
Water only when the potting soil is thoroughly dry. Check with your finger below the surface. Too much water quickly leads to yellowing of needles and rot of fine roots. Instead, it likes misting on the foliage (in the evening in summer), which cleans the stomata and hydrates the needles.

Water quality

It prefers light water, but adapts well to tap water. The important thing is that it is not too brackish or limey, so as not to alter the pH of the substrate in the long run.

Substrate

Drainage must be impeccable.

• Recommended mix: 50% Kiryuzuna (or medium-grained Pumice) and 50% Akadama.
• Kiryu is the Japanese substrate specifically for pine trees: it is hard, does not flake and provides oxygen to the roots for years. If you don't have it, pumice is an excellent substitute.

Repotting

Repot infrequently: every 3-5 years (or more for mature specimens), in spring (April), when the buds begin to move.
The golden rule for conifers applies here, too: do not wash the roots. Preserve the mycorrhiza (the white symbiont fungus) and leave some of the old soil loaf in the center, otherwise the tree may die of shock.

Fertilization

Fertilize with slow-release solid organic fertilizer.
Feed well in the fall (September-November) to prepare the tree for winter and subsequent budding. In spring, fertilize lightly. If you want very short needles, reduce spring fertilizer during candle elongation.

Flowering and fruiting

Produce pinecones that can remain on the tree for years. They are very decorative, short and stubby. However, pine cone production consumes a lot of energy: on a display or training bonsai, it is best to remove them or leave only one as an aesthetic detail.

Structure pruning

Major design work and removal of large branches is done during winter rest.
White Pine heals slowly and resin is less abundant than Black Pine, but covering cuts with mastic is still essential to prevent pathogens from entering the wood.

Maintenance pruning (Shoot selection)

Unlike Black Pine, White Pine does NOT defoliate and does NOT usually cut the candles to zero (Mekiri) because it struggles to produce a second shoot in the same year.
Maintenance is based on selection: if there are too many buds on a branch, only 2 (V-shaped) buds are left.

Stapling (Metsumi)

In spring, when the candles are elongating, you staple (break off with your fingers) the ones that are too strong, reducing them by 1/3 or 2/3. This slows down growth and keeps the shape compact without stressing the tree too much.

Binding & bending

White Pine branches are extremely flexible and can be bent into very sinuous shapes.
The best time is fall/winter. Use aluminum or copper wire. Because growth is slow, wire can stay in place for a long time (even 1-2 years), but always check that it does not mark smooth bark.

Diseases and pests

• Red spider mite: Causes punctiform yellowing of needles.
• Cottonwood me alybug: Hides among the needle fascicles.
• Laniger aphid: White flecks on new branches.

Winter & protection

Very cold-hardy (it is a high mountain tree). Can stay outside year-round. Protect the pot only during prolonged extreme frost to safeguard the pot itself and the capillaries.

Annual calendar

• January-February: Structural pruning, tying.
• March-April: Repotting (if necessary), start light fertilization.
• May: Candle stapling (Metsumi).
• June-July: Pest control, careful watering.
• August: Cleaning old needles (Momiage) to give light.
• September-October: Fall fertilization (important!).
• November-December: Rest.

Useful products for this bonsai

• Kiryuzuna (The best substrate for pine trees)
• Biogold fertilizer (Balanced nutrition)
• Bonsai tweezers (For cleaning dry needles)
• Coppered aluminum wire (To shape the branches)
• Healing putty (To protect cuts)
• White oil or Insecticide (Against mealybug)

Frequently Asked Questions about White Pine

Why is it called "Pentaphylla"?
From the Greek "penta" (five) and "phylla" (leaf). If you look at a bunch of needles, you will count exactly five starting from the same sheath. The Black Pine has two; the Ponderosa Pine has three.

Can I cut the candles like on the Black Pine?
Better not, or only if you are very experienced and the tree is very strong. The White Pine is weaker; if you cut everything (Mekiri), you risk that nothing will grow back and the branch will die. Just pinch (shorten) or select buds.

Why is it grafted?
Often White Pines (Miyajima variety) are grafted onto Black Pine roots (stronger and more vigorous). If you see a change in bark at the base of the trunk, that is the grafting point. It is valuable because it combines the beauty of White with the strength of Black.