A garden sun map shows where and when light hits your plot so you can place plants in the right spots through the seasons.
Light makes or breaks a planting plan. A quick map of sun and shade turns guesswork into a clear layout you can trust. Below you’ll track light by the hour, mark summer and winter paths, and set each bed up for success. No special gear is needed. A phone, a pencil, and a few short checks across the day will do the job.
Make Your Own Garden Sunlight Map: Step-By-Step
What you’ll need: a printed base plan or a simple sketch, tape or binder clips, two colored pens, a phone clock, and a few sticky notes. If you like digital tools, keep a copy of your sketch on your phone so you can mark it on the go.
Pick the test day. Choose a day with a normal sky for your season. If clouds roll in, repeat the missing time slots the next clear day. Run the checks in the growing season you care about most, then repeat in the opposite season to see changes.
Mark fixed features. Trace the house, fences, trees, sheds, tall hedges, and any parked vehicles that sit in one spot. Add windows and doors if heat reflection or access matters. Draw beds and containers you plan to keep.
Set time blocks. Use four to eight checks: sunrise, mid-morning, noon, mid-afternoon, and late day. Add extra slots if you garden near tall buildings or big trees where shadows move fast.
| Time Block | Direct Sun (hrs) | Notes |
|---|---|---|
| Sunrise | 0–2 | Long low shadows; east beds warm first |
| Mid-morning | 1–3 | Good for greens and herbs |
| Noon | 2–4 | Strongest light; watch for glare |
| Mid-afternoon | 1–3 | Heat can build near walls |
| Late day | 0–2 | West beds get softer rays |
Do the rounds. At each time block, walk the yard and mark sun with a yellow line and shade with a blue line. Draw quick “rays” into spots getting direct light. Put a dot on areas in dappled light under trees. Jot notes like glare off a wall or a hot patio.
Total the hours. After your last round, add the blocks for each bed or square on your map. Beds with six or more hours fit sun lovers. Three to six suits many flowers and roots. Less than three fits shade-tolerant picks.
Cross-check with a sun path tool. If you want to know angles and the arc across the sky, a calculator helps. The NOAA solar calculator shows sunrise and sunset directions and the sun’s position by hour. It’s handy when new builds or trees sit near your fence line.
Why A Sun Sketch Beats Guesswork
Plants read light in hours and intensity. A clear sketch gives you a fast way to match needs to spots. It also keeps you from overwatering shade corners that stay cool or baking a fern beside a south wall. You’ll see where tomatoes will set fruit, where lettuce won’t bolt, and where a bench stays comfortable.
Labels like full sun and part shade are short rules that guide placement. Many gardeners use a simple scale so choices stay easy. When you log hours, match them to those labels and you’ll pick with confidence.
You can use a common set of ranges: full sun is six hours or more, part sun or part shade is three to six, and full shade is less than three. See the plain definitions from Penn State Extension if you want the reference on one page. Your map turns those numbers into real spots you can plant.
Set Up Your Base Plan
Measure once. Step off lengths or use your phone’s measure app. A quick scale like one square equals one foot keeps sketches tidy. Add north with a tiny arrow in the corner so you can read morning and evening swing at a glance.
Print a satellite image if you like. Many mapping sites let you print your lot. Tape two sheets if you need more room. Trace over hard lines so later notes stand out. If you work in a notebook, leave a blank page facing the map for totals and plant lists.
Color code. Use one pen for direct light and another for shade. If you prefer pencils, pick two bold tones. Keep the same colors from round to round so patterns jump off the page when you’re done.
Run Observations Across The Day
Sunrise Sweep
Note which edges light up first. East beds warm first and can dry early. Note any frost pockets if you garden where nights run cool in spring.
Mid-Morning Check
This window shows how fast shade retreats. It tells you which narrow strips beside walls will cook later and which stay kind to leafy greens.
Noon Pass
The light is most intense. Mark the harsh edges. Flag any leaves that wilt. That tells you where a clay pot or a dark path may heat up a bed.
Mid-Afternoon Lap
West beds can swing hot. Track glare near pale walls and glass. If a bed climbs past six hours here, plan sun lovers or add a trellis for afternoon relief.
Late-Day Note
This is the comfort slot for seating. Mark where shade settles for the evening. Those spots also handle shade herbs and greens once summer peaks.
Map Summer And Winter Paths
The sun’s arc climbs high in warm months and sits lower in the cold part of the year. That shift moves shadows by many feet. A quick second map in the opposite season makes layout choices stick. If you can’t wait months, sketch both arcs using a tool and your best guess on leaf cover.
Mark trees as “leaf-on” and “leaf-off.” A bare oak in winter lets light pour onto a bed that turns dappled in summer. If you plan a pergola or canopy, draw a thin outline to test the shade before you build.
Shade Types And How To Mark Them
Full Sun
Six hours or more of direct rays. Mark these blocks with bold rays on your sketch. These beds suit fruiting crops, most herbs, and many shrubs that like heat.
Partial Sun Or Part Shade
Three to six hours with cooler spells in between. Mark with alternating rays and dots. These strips are perfect for roots, many annuals, and berries that can scorch under all-day light.
Dappled Light
Leaves break up the rays. Mark with a soft dotted fill. In summer this can act like gentle partial shade that still grows a wide range of plants.
Full Shade
Less than three hours of direct light. Mark with a calm blue block. These corners carry ferns, hostas, hellebores, and foliage plants that shine without strong sun.
Turn Notes Into Planting Moves
Place sun lovers. Tomatoes, peppers, squash, melons, eggplant, lavender, and most woody herbs want six hours or more. Give heat-tolerant picks the west side if afternoons run hot where you live.
Place partial sun plants. Roots like carrots and beets, many flowers, and berries such as currants can work with three to six hours. These beds often sit under light tree canopies or near fences that cast shade part of the day.
Place shade picks. Ferns, hostas, hellebores, and many spring ephemerals thrive with less than three hours and dappled light. These corners stay cool and hold water better in midsummer.
Tune heat and reflection. South walls, stone, and light paving bounce heat into nearby soil. Dark paving soaks heat. If a bed runs too hot, add mulch, a light fabric, a tall pot, or a trellis to break the rays.
Quick Fixes Your Map Reveals
Lift the canopy. A careful prune on lower branches can open a narrow beam of light without removing a tree. Do small cuts and step back often. Safety first.
Shuffle containers. Pots are your lever. Slide heat lovers toward the bright edge and move leafy greens into the cooler band that shows up on your sketch.
Use light fabrics. Shade cloth, lattice, or a vine on a simple frame gives instant relief to a bed that tips over the line in late day.
Catch rain where shade sits. Drip lines under trees and slow soil drying under big hedges. Add a soaker hose, compost, and mulch to even things out.
Common Mapping Mistakes To Avoid
Only timing one day. Try a second pass in a different month. Even one winter check and one summer check will refine the plan.
Chasing apps without ground truth. Apps help, but they can’t see your exact fence height or that parked van. Walk the yard. Let the real shadows guide you.
Forgetting walls and glass. Reflected heat can be harsh near pale siding and windows. Your notes on glare save leaves from scorch marks.
Ignoring dapple. Dappled light under mature trees changes by the hour. Mark it with dots and treat it as a friendly middle ground for many plants.
Helpful Tools And Simple Upgrades
String grid. Stretch twine to divide a bed into squares. Track light by square. This makes later crop rotation easy, too.
Time-lapse photos. Prop your phone and snap a shot each hour. A quick flip through the images shows the shade edge moving across the bed.
DIY sun stick. Push a dowel into the soil and mark shadow tips through the day. Connect the marks. You’ll see the arc without a screen.
Seasonal angle check. If you like maps, you can also view azimuth and height by hour in the NOAA position tool. Pair that with your notes to predict where shade will sit in spring and fall.
Plant Groups And Light Matchups
| Group | Hours Of Direct Sun | Good Spots |
|---|---|---|
| Heat lovers | 6+ | Open beds, south and west edges |
| Partial sun | 3–6 | Dappled zones, near fences |
| Shade tolerant | <3 | North edges, under trees |
Match the groups to the hours you logged. If a corner falls between bands, trial a plant or add light with a reflective pot. If heat is the issue, give plants air and mulch. Small tweaks often unlock a bed that once felt tricky.
Keep Your Map Fresh
Gardens change. Trees grow, neighbors add sheds, and seasons shift your habits. Pin your sketch to a wall in the shed or save a photo in a notes app. Add quick edits when you see a pattern. A minute here and there saves whole seasons of poor growth.
Each spring, skim your notes and plan moves. Each fall, add a short check so you know how winter light lands. If you add a structure, do one extra pass to see the new shade band. This is light maintenance that pays you back in harvests and healthy borders.
One-Day Schedule You Can Copy
7:00 Walk with coffee, mark first light. 10:00 Note which strips lose shade. 12:30 Flag harsh edges. 15:00 Track hot spots. 18:00 Mark where the yard calms down. Total the hours and list plants for each bed.
That’s it. You now have a clear picture of light in your space. Use it to pick smarter, water smarter, and enjoy a yard that matches your goals. When beds match light, plants stay healthy and care gets easier.