How to Grow and Care for Bonsai Trees

Choose the right tree species. Select a tree that suits the environment where you plan to grow it. Consider both the local climate and indoor conditions when deciding on the type of tree. For safety, opt for native species that thrive in your region.

• Deciduous trees like Chinese or Japanese elms, magnolias, oaks, and crabapples are excellent choices for outdoor bonsai. Ensure the species can grow to their full size in your area.
• If you prefer evergreen trees, consider pines, junipers, spruces, or cedars as great options.
• For indoor bonsai (or if you live in a hot climate), tropical species like jade plants, snow roses, and olives are ideal for bonsai cultivation.

Decide whether to grow the tree from seed. Growing bonsai from seeds is a time-consuming but rewarding process. You’ll need to wait for the tree to establish strong roots and grow sturdy before beginning pruning and shaping. Depending on the species, this can take up to 5 years. Many enthusiasts find the effort and time worthwhile, as seeds are inexpensive and allow complete control over the tree’s growth stages. To grow a bonsai from seed, follow these steps:

• Purchase a bonsai seed kit. Soak the seeds overnight, then plant them in well-draining soil with nutrients suited to the tree species. Use a standard pot (not a decorative ceramic one, which is typically used only after the tree has been shaped and matured).
• Provide the tree with adequate water, sunlight, and a stable temperature, ensuring these match the species’ requirements.
• Wait until the tree is strong and healthy before starting any shaping or pruning.

Consider finding a pre-existing tree. This method is highly regarded, as locating a bonsai candidate in the wild requires skill and knowledge. If you’re interested in finding a wild tree, keep the following in mind:

• Choose a tree with a sturdy trunk but relatively young age. Older trees often struggle to adapt to potted conditions.
• Select a tree with roots that spread evenly in all directions, rather than growing to one side or entangled with other roots.
• Dig around the tree and remove a large amount of soil along with the roots to prevent shock or death when transplanting it into a pot.
• Plant the tree in a wide, standard training pot. Care for it according to its specific needs, and wait about a year for the roots to adapt before beginning shaping.

Choose a partially shaped bonsai tree. This is the easiest way to start learning bonsai art but also the most expensive. Significant time and effort have already been invested in growing and shaping these trees, making them costly. You can find such trees at nurseries, specialty stores, or online.

• If you purchase a pre-shaped bonsai, ask the grower about its specific care requirements.
• After bringing the bonsai home, allow it a few weeks to adjust to its new environment before pruning.

Pay attention to seasonal changes. Like all plants, bonsai trees respond to seasonal shifts. Outdoor trees are particularly sensitive to changes in temperature, light, and rainfall. Some regions experience four distinct seasons, while others have minimal seasonal variation. Regardless, research how your tree species reacts to seasonal changes in your area and adjust care accordingly.

• Trees typically go dormant in winter, shedding leaves and halting growth, so they require less nutrients. During this period, watering is sufficient. Avoid heavy pruning, as the tree cannot replenish lost nutrients until spring.
• In spring, trees use stored nutrients to sprout new growth. This transitional phase is ideal for repotting (adding fresh nutrients to the soil) and starting pruning.
• Growth continues through summer, depleting remaining nutrient reserves. Ensure consistent watering during this time.
• In autumn, growth slows, and nutrients begin to accumulate again. This is a suitable time for both pruning and repotting.

Expose the tree to morning sunlight and provide shade in the afternoon. The light requirements for bonsai trees vary by species and regional climate, but most thrive in areas with morning sun exposure. Every few days, rotate the pot 90 degrees to ensure all parts of the foliage receive equal light.

• Indoor plants may need shading with window curtains during the hot summer months.

Protect the tree from extreme temperatures. During summer, the tree can stay outdoors most of the time. Bring it inside at night when temperatures drop below 4°C. Before winter arrives, gradually acclimate the tree to indoor conditions by bringing it inside for a few hours each day, eventually keeping it indoors permanently.

Provide water and nutrients to the tree. Use specialized bonsai fertilizer to maintain the tree's health. Water the tree when the soil begins to dry. The frequency of watering depends on the species and the season. Daily watering may be necessary in summer, but during cold winter months, water only every few days.

Choose a style for the tree. There are numerous traditional bonsai styling techniques to choose from. Some styles mimic natural growth patterns, while others are more unique. Dozens of bonsai styles are available, though some are limited by the pot's size. Here are some of the most popular bonsai styles:

• Chokkan This is the formal upright style, depicting a strong, straight tree with evenly spread branches.
• Moyohgi This is the informal upright style, featuring a natural slant rather than a straight vertical growth.
• Shakan This is the slanting style, where the tree appears to be leaning against the wind, creating a dramatic effect.
• Bunjingi This is the 'literati' style, characterized by a long, twisted trunk with minimal branches.

Shape the trunk and branches. Shaping a young bonsai involves bending the trunk and branches to guide its growth. Use wire to maintain the desired shape as described here:

• Use annealed copper wire for evergreen species and aluminum wire for deciduous trees. Thicker wire is needed for the lower trunk, while thinner wire works for branches.
• Secure the wire by wrapping it around the trunk or branch 1-2 times. Avoid wrapping too tightly to prevent damage.
• Wrap the wire at a 45-degree angle, holding the tree steady with one hand as you work.
• The need for wiring varies depending on the time of year and whether the tree has recently been repotted.
• Over time, as the tree grows into the desired shape, rewire it and continue shaping until it can maintain its form without wire assistance.

Prune and trim the tree. Use small pruning shears to selectively remove leaves, buds, and parts of branches to guide the tree's growth. Each pruning session stimulates new growth in different areas. Deciding where and how often to prune is an art in bonsai cultivation, requiring practice to master.

• When transferring the tree to a smaller pot, trim the roots to fit. Avoid root pruning until the trunk reaches the desired size.
• Prune in summer to encourage new growth. Remove entire branches in autumn when the tree is less active. Perform maintenance pruning to remove dead branches in late winter or early spring.
• Over-pruning can harm the tree, so avoid cutting too much.

Transfer the tree to a display pot. Once the bonsai has achieved its desired shape, move it to a display pot. Choose from a variety of ceramic or wooden pots that complement the tree's style. Ensure the pot is wide enough to hold sufficient soil and nutrients for the tree's health.

• Select a pot with a length proportional to the tree's height. Deeper pots are needed for thicker trunks.

Consider adding decorative accents. While the bonsai should be the centerpiece, small accessories like rocks, shells, or miniature plants can enhance its beauty, creating a forest or beach scene.

• Avoid placing rocks or objects too close to the roots.
• Adding moss patches is an excellent way to create an appealing landscape.

Display your bonsai on a dedicated stand. A stunning bonsai deserves to be showcased like any other piece of art. Consider placing a wooden or metal stand in front of an empty wall to highlight your bonsai. Positioning it near a window is ideal, as the tree still requires light even while on display. Continue watering, fertilizing, and caring for it, and your bonsai masterpiece will thrive for many more years.