Sun Mapping

Sunlight is one of the most important factors in garden planning, yet it’s something many gardeners overlook or guess at. Every garden has its own pattern of light and shade that shifts throughout the day and across the seasons. Sun mapping helps you understand where sunlight naturally falls in your space so you can choose the right plants, design the right layout, and avoid frustrating mistakes like burning shade-lovers or starving sun-loving flowers and vegetables.

Sun mapping isn’t fancy or technical — it’s simply observing your garden with intention. By taking note of sunlight at different times, you begin to see how buildings, trees, fences, hills, and even seasonal angles of the sun affect your growing space. This knowledge gives you the confidence to place plants where they’ll thrive, make the most of limited sunlight, and adapt your garden to your climate and goals.

Whether you’re growing vegetables that demand full sun, shade-loving woodland plants, or a mix of both, knowing your sun patterns is the foundation for a successful, resilient garden.

What Sun Mapping Involves

Sun mapping means tracking how many hours of direct sunlight different areas of your garden receive in a typical day. Most gardeners map sun in one of two ways:

  1. By observing the sun at several times throughout the day, or
  2. By tracking specific garden areas and counting hours of direct light.

You can use a simple sketch, a phone camera, a notepad, or even a sun-tracking app — but none of that is required. The goal is simply to understand your light patterns well enough to make wise planting decisions.

Sun Exposure Categories

Gardeners and plant tags use these standard terms to describe light levels:

  • Full Sun: 6+ hours of direct sun per day
  • Partial Sun / Partial Shade: 3–6 hours of direct sun
  • Dappled (Filtered) Light: shifting speckled sun through leaves
  • Full Shade: Less than 3 hours of direct sun
  • Deep Shade: Little to no direct sun at all

These hours don’t have to be consecutive — what matters is the total amount of light your plants receive.

How to Map Sunlight in Your Garden

1. Observe at Key Times of Day

Check your garden at these approximate times:

  • Early morning (8–10 AM)
  • Midday (12–2 PM)
  • Late afternoon (4–6 PM)

Write down which areas are in sun or shade at each time.

2. Track Direct Sun Hours

Choose a few key spots where you want to plant and:

  • Note when the sun first hits
  • Note when shade returns
  • Add up the total hours

This tells you whether that spot qualifies as full sun, partial sun, or shade.

3. Repeat Across Seasons

Sun angles change dramatically:

  • Spring sun rises lower and casts longer shadows
  • Summer sun is high and bright
  • Fall shadows lengthen again
  • Winter light may only hit certain areas

Even one observation per season will improve your overall picture.

4. Notice Shade Sources

Take note of:

  • Trees (their leaves change shade patterns seasonally)
  • Your home or garage
  • Neighboring buildings
  • Fences and hedges
  • Slopes or raised beds
  • Patios or pergolas

These objects create predictable daily shade structures.

5. Mark It on a Map

Use a simple garden sketch or aerial printout and mark:

  • Full sun areas (highlight yellow)
  • Partial sun/shade areas (green)
  • Full shade areas (blue)

This becomes your planting blueprint.

Why Sun Mapping Matters

Better Plant Placement

You’ll know exactly where to place:

  • Full-sun vegetables
  • Shade-loving flowers
  • Heat-tolerant herbs
  • Moisture-loving plants that prefer cooler spots

Healthier Plants With Less Effort

Plants grown in their preferred light:

  • Grow faster
  • Bloom more
  • Resist pests better
  • Require fewer inputs (water, fertilizer)

Smarter Garden Layout

Sun mapping helps you decide where to put:

  • Raised beds
  • Flower borders
  • Seating areas
  • Trellises
  • Trees or shrubs
  • Container zones

Fewer Surprises Later

You’ll anticipate:

  • Afternoon heat pockets
  • Midday sun intensity
  • Seasonal shade shifts
  • Canopy changes as trees leaf out

Sun Mapping in Your Garden

Once you start mapping sunlight in your own garden, you’ll begin to see your space in a whole new way. You’ll understand why certain plants struggled in the past, why others unexpectedly thrived, and how to use your unique light patterns to your advantage. Over time, sun mapping becomes second nature — you’ll automatically notice how the seasons shape your yard, where you can push the limits of your growing zone, and which areas offer opportunities you hadn’t seen before.

Whether you’re planning a vegetable bed, designing a flower border, or creating a relaxing seating nook, knowing your sunlight patterns helps you make choices you can trust. Use your sun map as a foundation for the rest of your garden planning, and you’ll be amazed at how much smoother designing, planting, and growing becomes.