Latest Methods for Making and Caring for Chinese Fringe Flower (Loropetalum) Bonsai

Loropetalum chinense var. rubrum is commonly used to make bonsai, and can be trained into different forms such as single-trunk, double-trunk, deadwood, curved-trunk and forest styles. The crown can be shaped into an elegant natural form, or into round pad shapes of varying sizes arranged in a pleasing staggered pattern. The shaping methods include wiring, guy-wiring and pruning. Let us take a look below at how to make and care for Loropetalum bonsai!

Propagation Methods for Loropetalum chinense var. rubrum

1. Grafting: Grafting mainly uses two methods, cut grafting and bud grafting, and can be carried out from February to October. Cut grafting is best done before bud break in spring, while bud grafting is best done in September to October. Multi-head grafting is carried out using medium and small plants of white Loropetalum (Loropetalum chinense) as rootstock. With strengthened water and fertilizer management and pruning, the plants can leave the nursery within 1 year.

2. Cuttings: Cuttings can be taken from March to September. Use loose loess soil as the cutting medium, ensure the medium is well aerated and drained and the air humidity is high, keep it warm but avoid direct sunlight, and make sure the cutting environment is well ventilated. Under warm and humid conditions, the cuttings form red callus in 20 to 25 days, and after 1 month grow 3 to 9 new roots 0.1 cm thick and 1 to 6 cm long.

3. Sowing: Sowing in spring and summer gives a high seed germination rate. Seeds germinate about 25 days after sowing, and in 1 year the seedlings can grow to 6 to 20 cm tall and produce 3 to 6 branches. The new roots of seedlings are red and fleshy, and careful management is required in the early stage until the root system becomes woody and turns brown, after which more extensive management is possible. Because of its long seedling stage, slow growth, and the appearance of white Loropetalum seedlings (atavism), sexual propagation is generally not used for nursery production but for breeding research on Loropetalum chinense var. rubrum.

Making Loropetalum Bonsai

1. Specimen planting: Choose a tall, full plant and plant it alone in an important position or at a focal point of view, such as near an entrance, in a courtyard or on a lawn, forming a landscape on its own. Pay attention to creating a strong contrast with the surrounding landscape to achieve the effect of “a touch of red among a sea of green”, so that it can serve as the central focal point of the landscape or guide the line of sight.

2. Group planting: Plant Loropetalum balls and other plants in clusters as accents in garden green spaces, which both enriches the landscape colors and enlivens the garden atmosphere. When planted in groups with green tree species, they all produce a beautifying effect. Planting Loropetalum balls as the main species in groups and patches forms a scenic forest; its unique leaf color and posture are beautiful in all four seasons, and its beautifying effect is far better than that of a purely green scenic forest.

3. Mass planting: Use one-year-old small Loropetalum seedlings planted densely in green spaces to form color blocks. They can be combined with golden privet (Ligustrum sinense 'Variegatum'), spring-flowering azaleas, summer-flowering azaleas, golden-leaved elm (Ulmus pumila 'Jinye') and golden-edged box (Euonymus japonicus 'Aureus'), etc. This not only forms color contrast through the difference in leaf color, but the flowering periods can also be staggered. For this use, cultivars of the Tongue-red group are suitable.

4. Ball shapes: Prune Loropetalum into ball shapes and place them in green belts. They are mainly divided into two types, rough balls and fine balls. Rough balls are mainly formed after 1 to 3 years of pruning and shaping, and are mainly used in larger green spaces with somewhat extensive management. Fine balls require at least 3 years of pruning and shaping, and are mainly used in refined gardens such as villa courtyards. For this use, cultivars of the Tongue-red group are suitable.

5. Color hedges: Plant Loropetalum densely to form color hedges that serve to enclose and divide space. The specifications of the nursery stock should be selected according to the specific use of the hedge. For example, in green spaces, a 70 to 80 cm hedge can be used to divide space, while hedges higher than 2 m are mostly used around the outer edge of green spaces to serve as a green wall.

6. Color sculptures: Train or shape Loropetalum in a targeted way into green sculptures such as animals or geometric shapes, and place them in green spaces as garden features. For this use, cultivars of the Tongue-red group are suitable.

7. Stump landscape: Taking advantage of the fast growth, large leaves and sparse branches of the Double-faced Red group of Loropetalum, train it in a targeted way into large stump landscape specimens for landscaping in high-grade gardens, and it can also be used as the focal point of a flower bed in the layout.

8. Street trees: Through pruning control, train Loropetalum into a small colorful-leaved tree, or cultivate it by grafting onto white Loropetalum. It is mostly used as a street tree in residential areas. For this use, cultivars of the Tongue-red group are suitable.

Caring for Loropetalum Bonsai

1. Soil: Loropetalum chinense var. rubrum prefers slightly acidic soil. If the soil is too alkaline, the bonsai will grow poorly and even die. For growing Loropetalum bonsai, a mix of river sand, coal ash and yellow loam in a 3:2:5 ratio is ideal; river sand and yellow loam in a 3:7 ratio, or sandy yellow loam, can also be used. Place a layer of well-drained coarse sand or expanded clay pellets at the bottom.

2. Pruning: Pruning and shaping are especially important for growing a good Loropetalum bonsai. To maintain the ornamental shape of the bonsai, during its growth period remove dominant branches, water sprouts, clustered branches, weak inner branches and pest- or disease-damaged branches, etc. Pruning the growing points and removing leaves can also regulate the flowering period or the red-leaf period. Heavy pruning is more suitable around the peak flowering period or in early autumn, and the effect is better when combined with repotting. After flowering, remove spent flowers and developing fruit as early as possible to avoid consuming nutrients.

3. Repotting: Repotting benefits the growth of Loropetalum. When repotting, pay attention to pruning old roots, water-sprout roots, overlapping roots and coiled roots, thinning overly dense root hairs, removing rotten and dead roots, shaking off the old soil and replacing it with new soil. The repotting interval depends first on the vigor of the stump landscape and second on the size of the pot. Generally, large pots are repotted every 3 to 4 years, medium pots every 2 to 3 years, and small pots every 1 to 2 years; in special cases it can be done at any time.

4. Fertilizing: Fertilizing Loropetalum follows the principle of light but frequent applications. During the growing period, apply diluted, fully fermented cake fertilizer water twice a month, with 1% urea added occasionally. Spraying an 800 to 1000 times dilution of monopotassium phosphate before the flowering period can promote flower bud differentiation and enhance flower color. Do not fertilize during the flowering period or the dormant period. Also spray a 0.5% ferrous sulfate solution once each season to maintain soil acidity. Fertilizing should be done on cloudy days or in the evening on sunny days.

5. Watering: Watering Loropetalum bonsai should be handled flexibly according to the season, climate, pot size and plant growth condition. In principle, each watering must soak through, keeping the soil moist but not waterlogged. In the high heat of midsummer, in addition to watering thoroughly in the morning and evening and spraying the leaves, provide some shade where possible to avoid scorching sun burning the roots near the pot wall or scorching the leaves and causing localized withering at the leaf edges; high temperatures can also turn the leaves green, affecting the ornamental value.

6. Pests and diseases: Loropetalum chinense var. rubrum has strong resistance to pests and diseases, but poor management can lead to problems such as black spot, sooty mold and scale insects. Therefore, when growing Loropetalum, pay attention to monitoring for pests and diseases, and achieve early detection and early treatment.