Sun/Shade Mapper
Estimate sun exposure in your garden based on nearby obstacles like buildings and trees.
Sun/Shade Mapper
Estimate sun exposure in your garden based on nearby obstacles
Formula
Shadow Length = Obstacle Height / tan(Sun Angle)Calculates shadow cast by obstacles at different times of year
How to Use
- 1Enter your latitude — Input your approximate latitude (use a map or GPS).
- 2Select the month — Choose the month you want to analyze.
- 3Measure obstacles — Enter the height and distance of nearby buildings or trees.
- 4Set obstacle direction — Indicate which direction the obstacle is from your garden.
- 5View results — See estimated sun hours and plant recommendations.
Frequently Asked Questions
How do I find my latitude?
Search your address on Google Maps and look at the URL or use your phone's GPS. Most of the continental US is between 25° and 49° latitude.
What counts as full sun?
Full sun means 6 or more hours of direct sunlight per day. Most vegetables and flowering plants need full sun.
How accurate is this calculator?
This provides estimates based on sun angle calculations. Actual conditions vary with weather, multiple obstacles, and terrain.
Does obstacle direction matter?
Yes! In the northern hemisphere, obstacles to the south block the most sun. East obstacles affect morning sun, west affects afternoon.