Bonsai-Seed:
Red Maple

When propagating bonsai, the great advantage lies in the ability to influence the shape and form of the tree from the very beginning. While it takes longer to grow a tree from seed, this method allows you to put your personal touch on both the size and design early on. By using shallow bonsai pots, the plant develops a more compact growth than wild saplings found in nature.

Introduction
This beautiful deciduous tree is fast-growing and, with its striking autumn colour, is a key participant in the famous "Indian Summer". The leaves are small and 3-5 lobed – the same leaf that graces the Canadian flag. Even young plants flower, producing clusters of red blossoms from March to June. The Red Maple develops very shallow roots, making it ideal for bonsai culture in flat pots.

Propagation
The seeds require a period of frost to germinate. Place the seeds in the freezer for about 2-3 weeks. Afterwards, soak the seeds in water for 24 hours and then press them onto moist seed-starting soil or sandy garden soil. A germination temperature of approximately 20°C is sufficient, with seeds usually sprouting within 30-60 days.

Location and Light
The Red Maple loves bright to sunny locations. Even young seedlings are quite fast-growing and often reach a height of 30 cm in a short time. Plenty of light is essential for developing the most intense red autumn foliage.

Watering and Nutrients
The plant is adaptable and tolerates short-term drought as well as waterlogging. From May to August, the bonsai should be supplied with bonsai fertiliser, ideally every 3 weeks, to ensure healthy development.

Growing Medium
As with all maple species, the soil mix should provide good drainage. An addition of lava or pumice stone is suitable. Commercial bonsai soil over a drainage layer of pebbles is also an excellent option.

Pruning
For seedlings, do not begin pruning until the second year. To develop a strong trunk, shorten the branches only 1-2 times per year. For remaining branches, prune new growth back to two pairs of buds. Since maple buds sit opposite each other, ensure the remaining pair points left and right to allow the leaves space. The final pruning of the season should be done in early August.

Winter Storage
The tree is fully hardy, but the roots in a shallow pot should be protected from extreme frost. A cool, bright, and sheltered outdoor location is ideal for overwintering.

Important Growing Tips
Use professional seed-starting soil or coconut coir for sowing, as these media provide good aeration and have low nutrient content. Keep the medium evenly moist during germination – not wet. Cover the tray with clear film or glass and ventilate every three days to prevent mould. Limit direct sunlight for the first six weeks after germination. After 5–8 weeks, the seedling can be carefully transplanted. Take care not to damage the delicate new roots.