Planting Ginkgo biloba requires following the eight key principles: "strong, large, full, dry, solid, shallow, transparent, and high." To make it easier to remember, there's a simple rhyme: "Strong seedlings grow fat; dry soil is filled with layers. Plant shallow, avoid lodging. Good air circulation and high temperature—these eight rules are easy to follow, ensuring high survival and excellent growth."
A strong: Choose strong seedlings with thick stems and balanced height and thickness. The roots should be well-developed and healthy, as the saying goes, "You can buy seedlings, but you can't buy roots." Fresh seedlings are crucial—plant them right after digging to maintain vitality. However, many ginkgo seedlings today are stored for long periods, sometimes up to two or three months, which can reduce their quality.
Large: Dig large planting holes, typically one meter in size. If the seedlings are larger, adjust the hole size accordingly to accommodate their root systems.
Full: Apply enough base fertilizer when planting. Use fully mature organic fertilizers, and mix them thoroughly with soil before placing them in the upper or middle part of the hole. Leave about 20 cm of soil on top to prevent direct contact between roots and fertilizer, which could burn them. If suitable fertilizer isn't available, don’t force it—better to plant safely and replant later if needed.
Dry: Fill the hole with loose, well-drained soil, avoiding any compacted areas that might harm the roots.
Solid: Pack the soil firmly around the roots, layer by layer, to ensure good contact between the roots and soil. Avoid over-compacting with your feet, especially in wet, clay-heavy soils like those found in Shanghai during spring. In such conditions, shallow planting and raised beds are better to prevent waterlogging and allow natural settling.
Shallow: Plant Ginkgo shallowly, especially in areas with high groundwater levels and heavy rainfall. Shallow planting helps the roots warm up faster, improves air circulation, and reduces the risk of root rot after rain. If the planting hole is too deep, the survival rate drops. It’s best to plant the roots level with the ground or slightly above, and in flat areas, small mounds are ideal.
Transparent: After planting, water thoroughly to help the soil settle around the roots. Once the water is absorbed, the surface should be level with the ground or slightly higher (1-2 cm) to avoid water pooling.
High: Create a raised mound of 20–30 cm after watering. This has three benefits: protecting against flooding, preventing wind damage, and reducing the risk of root rot during the rainy season. Avoid leaving depressions in the soil, as they can collect water and cause root decay in hot, wet weather.
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