Food Forest Site Analysis: Map Before You Plant
A food forest site analysis turns a property into a set of design facts. It records what is fixed, observes what changes, identifies hazards and bottlenecks, and shows where plants and infrastructure can succeed before permanent trees go into the ground.
The short answer: Start with a scaled base map, then add separate overlays for sun, water, wind, soil, slope, utilities, access, existing vegetation, wildlife, and human use. Observe through meaningful weather and seasonal events, then write design responses beside each constraint.
Build the Base Map
The base map holds stable facts: boundaries, dimensions, north, buildings, hard surfaces, utilities, wells, septic areas, easements, existing trees, and elevation clues.
Begin with a survey, parcel map, aerial image, or careful measurements. Verify rather than assume property lines. Mark doors, gates, downspouts, hydrants, power, buried services, overhead lines, retaining walls, roads, and structures. Call 811 before digging and follow local requirements; a utility mark is not a complete site design, but it prevents a preventable hazard.
Draw to a consistent scale so plant canopies and paths mean something. Keep the base map clean and use tracing paper or digital layers for observations. Oregon State’s permaculture materials and mapping instruction emphasize translating landform, water, vegetation, and use patterns into design decisions rather than decorating an aerial photo.
Map Sun, Shade, and Microclimates
Record where direct sun reaches the ground during the growing season and how buildings and mature trees change it. Winter sun alone can mislead a fruit-tree layout.
Observe morning, midday, and afternoon patterns near the longest and shortest days that matter to plant growth. Note reflected heat, frost pockets, wind shelter, cold-air drainage, and snowmelt. The existing Microclimates guide handles the detailed temperature and exposure effects; this analysis records them alongside all other site factors.
Watch Water Move
Walk during heavy rain and after snowmelt. Mark water entering, concentrating, ponding, infiltrating, and leaving the site; include roofs, drives, neighboring land, and compacted paths.
Separate four different questions: where water can be stored, where runoff should infiltrate, how irrigation reaches roots, and where damaging excess must drain safely. Do not prescribe a swale, pond, French drain, or rain garden until the water problem is identified. Use the Water Management hub to choose the right tool.
Flag wet feet near foundations, septic systems, unstable slopes, concentrated outlets, and property-line disputes for qualified advice. A food forest should not redirect a water problem toward a building or neighbor.
Assess Soil and Contamination Risk
Combine a lab soil test with field observations of texture, drainage, compaction, depth, roots, fill, and past land use. No single test describes the whole rooting environment.
Sample distinct management areas separately when the history or soil visibly differs. Use a laboratory for pH and nutrient guidance. Dig observation holes where safe to see structure, restrictive layers, perched water, construction debris, or compaction. USDA Web Soil Survey adds landscape context but may not capture small disturbed urban areas.
For urban, roadside, industrial, painted-building, or filled sites, review the property history and ask the lab or local environmental authority which contaminant tests are appropriate. EPA notes that ordinary fertility testing may not include contaminants. Use the existing Soil Testing guide for sampling and interpretation.
Map Wind, Wildlife, and Existing Vegetation
Record prevailing and damaging winds, funnels between buildings, drifting snow, and storm exposure. Note deer routes, rabbit or vole pressure, domestic animals, pollinator habitat, and nesting areas. Existing vegetation can reveal wetness, disturbance, shade, and soil conditions, but identify invasive plants and hazardous trees before assigning them a role.
Inventory valuable assets: healthy mature trees, shelter, hedges, good soil, existing irrigation, useful structures, and productive plants. The cheapest design move may be to keep and connect what already works.
Map People, Access, and Management
A site is not only ecology. Mark how people, tools, materials, harvests, vehicles, children, customers, and animals move through it.
Draw frequently used routes, awkward corners, work areas, views to preserve, privacy needs, hose limits, storage, compost flow, and winter access. Then layer Permaculture Zones over the map: high-attention work should be easy to reach, but still must fit sun, water, soil, and safety.
Turn Observations Into Design Responses
| Observation | Question | Possible response |
|---|---|---|
| Morning sun, afternoon shade | Which crops tolerate the final light? | Use appropriate shrubs; keep high-light fruit elsewhere |
| Runoff crosses a path | Can the route follow contour or cross at a stable point? | Reroute, stabilize crossing, manage source |
| Compacted fill | How deep and extensive is the restriction? | Targeted remediation before planting |
| Daily harvest is far from kitchen | Can Zone 1 move closer? | Relocate herbs/berries or improve route |
| Mature healthy tree | What light and root conditions exist around it? | Retain as structure; plant compatible edge species |
Finish with three lists: opportunities, constraints, and unknowns that need testing or professional advice. Only then move to Spacing & Layout and the Planning Checklist.