Unit 3250: Horticultural Garden Design and Maintenance

1. Understanding Horticultural Design Principles

1.1 Introduction to Design Principles

• Definition and importance in garden design

1.2 Key Principles

• Balance: symmetrical, asymmetrical, and radial
• Proportion: size relationships among plants and structures
• Unity: creating a cohesive garden theme
• Rhythm: repetition and progression in garden elements
• Focalization: establishing points of interest

1.3 Application of Principles

• Case studies of garden layouts
• Practical exercises in applying principles to conceptual designs

2. Site Analysis and Assessment for Garden Design

2.1 Conducting a Site Survey

• Mapping existing features
• Measuring garden dimensions

2.2 Environmental Factors

• Soil quality: texture, pH, fertility
• Sunlight exposure: microclimates, sun/shade patterns
• Drainage: water flow, erosion risks
• Existing vegetation: identification and assessment

2.3 Impact on Design Decisions

• Matching plant requirements to site conditions
• Identifying constraints and opportunities

3. Selecting Plants for a Horticultural Garden

3.1 Plant Selection Criteria

• Climate adaptability
• Soil compatibility
• Water requirements and drought tolerance
• Aesthetic factors: color, texture, form

3.2 Developing a Plant Palette

• Combining plant types: trees, shrubs, perennials, groundcovers
• Creating seasonal interest
• Native vs. exotic species considerations

3.3 Plant Sourcing and Availability

• Nurseries and suppliers
• Plant health and quality assessment

4. Designing Functional Garden Spaces

4.1 Garden Features and Their Functions

• Seating areas: placement, materials, comfort
• Pathways: design, materials, accessibility
• Water features: ponds, fountains, irrigation
• Vegetable and herb gardens: layout and companion planting

4.2 Integrating Features into Overall Design

• Flow and connectivity
• Aesthetic coherence
• User experience and safety

5. Implementing Sustainable Practices in Garden Design

5.1 Water Conservation Techniques

• Drip irrigation, rainwater harvesting

5.2 Soil Health and Composting

• Organic matter management
• Composting methods and benefits

5.3 Organic Pest Control

• Biological controls
• Companion planting
• Non-chemical interventions

5.4 Native Plant Selection and Biodiversity

• Benefits to local ecosystems
• Enhancing wildlife habitat

6. Maintenance and Care of a Horticultural Garden

6.1 Essential Maintenance Tasks

• Watering schedules and techniques
• Fertilizing: types and timing
• Pruning methods and timing
• Pest and disease monitoring and control

6.2 Developing a Maintenance Schedule

• Seasonal tasks
• Record keeping and monitoring

6.3 Tools and Equipment

• Proper use and care
• Safety considerations

7. Designing for Seasonal Interest

7.1 Understanding Seasonal Changes

• Plant growth cycles
• Seasonal color and texture variations

7.2 Plant Selection for Year-Round Appeal

• Early bloomers, summer plants, autumn foliage, winter interest

7.3 Planning Seasonal Displays

• Bulbs, annuals, and perennials
• Arranging for continuous bloom and visual interest

7.4 Case Studies and Design Examples

• Examples of gardens with strong seasonal impact