Bonsai Course

Lesson 1 • Essential Bonsai Vocabulary

Defines Japanese and horticultural terms used throughout the course. Accurate terminology enables precise communication and study of advanced resources.

Lesson 2 • Origins and Cultural Roots

Traces bonsai from ancient Chinese penjing through Japanese refinement. Provides historical grounding that informs modern design philosophy.

Lesson 3 • Bonsai Styles Overview

Surveys the five classical styles: formal upright, informal upright, slanting, cascade, and semi-cascade. Students identify style characteristics in reference specimens.

Lesson 1 • Tree Anatomy Fundamentals

Covers roots, trunk, branches, leaves, and vascular tissue relevant to bonsai. Understanding structure guides every intervention made on a tree.

Lesson 2 • Stress Responses and Recovery

Identifies how trees signal and recover from mechanical, drought, and disease stress. Recognizing stress early prevents irreversible damage to bonsai.

Lesson 3 • Growth Cycles and Dormancy

Explains seasonal growth patterns, dormancy triggers, and apical dominance. Timing of training techniques depends on accurate knowledge of growth cycles.

Lesson 1 • Workspace Organization and Safety

Guides setup of a functional bonsai bench, lighting, and tool storage. Safe ergonomic practices reduce injury during extended work sessions.

Lesson 2 • Core Bonsai Tool Types

Introduces concave cutters, knob cutters, shears, wire cutters, and root hooks. Each tool's purpose and correct grip are demonstrated before use.

Lesson 3 • Tool Maintenance and Hygiene

Covers cleaning, sharpening, oiling, and sterilizing tools between trees. Proper maintenance extends tool life and prevents disease transmission.

Lesson 4 • Bonsai Containers and Trays

Explains how pot size, depth, shape, and color relate to tree species and style. Container choice directly affects root health and visual harmony.

Lesson 1 • Watering Principles and Techniques

Teaches the finger-test method, watering frequency, and correct application technique. Overwatering and underwatering are the leading causes of bonsai death.

Lesson 2 • Fertilizer Types and Nutrients

Distinguishes nitrogen, phosphorus, and potassium roles and organic vs. synthetic sources. Correct nutrient ratios drive vigorous growth or controlled refinement.

Lesson 3 • Water Quality and pH Management

Addresses how mineral content and pH in water affect nutrient uptake and soil chemistry. Students test and adjust water quality to prevent long-term soil degradation.

Lesson 4 • Bonsai Soil Components

Examines akadama, pumice, lava rock, and organic components by drainage and retention. Soil structure determines oxygen availability and root health.

Lesson 1 • Developing Primary Branch Structure

Guides selection of first, second, and third branches for balanced visual weight. Primary structure decisions are the most consequential in bonsai design.

Lesson 2 • Pruning Goals and Timing

Defines structural pruning vs. maintenance pruning and optimal seasonal windows. Matching pruning type to growth stage prevents unnecessary stress.

Lesson 3 • Encouraging Ramification

Explains pinching, clip-and-grow, and selective pruning to multiply fine branch tips. Dense ramification creates the illusion of an aged, mature canopy.

Lesson 4 • Wound Treatment and Sealing

Covers cut paste application, wound sealants, and monitoring callus development. Sealed wounds heal faster and reduce entry points for pathogens.

Lesson 1 • Wiring Application Fundamentals

Teaches the 45-degree wrapping angle, anchoring technique, and two-branch wiring method. Consistent angle and tension are the foundation of effective wiring.

Lesson 2 • Monitoring and Removing Wire

Explains wire-bite prevention through regular inspection and timely removal. Wire left too long scars bark permanently and disrupts vascular flow.

Lesson 3 • Advanced Shaping with Raffia and Clamps

Introduces raffia wrapping for thick branch bending and mechanical clamps for trunk movement. These methods extend shaping possibilities beyond standard wire alone.

Lesson 4 • Bending and Positioning Branches

Demonstrates safe bending pressure, branch preparation, and use of guy wires for heavy limbs. Controlled bending achieves movement without splitting wood fibers.

Lesson 1 • Post-Repotting Care

Prescribes shading, reduced watering, and withheld fertilizer during the recovery window. Correct aftercare determines whether repotting strengthens or weakens the tree.

Lesson 2 • When and Why to Repot

Identifies root-bound signs, repotting frequency by species age, and optimal seasonal timing. Repotting at the wrong time can set a tree back by an entire growing season.

Lesson 3 • Root Pruning Principles

Covers safe root reduction ratios, identifying feeder vs. structural roots, and cutting technique. Removing the right roots stimulates new feeder root growth.

Lesson 4 • Nebari Development Techniques

Applies surface root spreading, tourniquet, and tile methods to build visible radial roots. Strong nebari is a hallmark of refined bonsai and takes years to develop.

Lesson 1 • Choosing Species for Your Climate

Matches tree species to local climate zones, indoor vs. outdoor requirements, and skill level. Species-climate mismatch is the most common cause of beginner failure.

Lesson 2 • Creating a Development Timeline

Structures multi-year plans with annual goals for trunk, branch, and root development. Long-term planning prevents reactive decisions that compromise the design vision.

Lesson 3 • Refining the Design Vision

Integrates aesthetic principles, species character, and accumulated skill into a cohesive vision. Design refinement is an ongoing dialogue between practitioner and tree.

Lesson 4 • Sourcing Quality Material

Evaluates nursery stock, collected yamadori, pre-bonsai, and trained specimens by potential. Raw material quality sets the ceiling for the final design outcome.