
What to plant, and where
6.0 h in June, 7.8 h in December
Tomatoes want six hours. Hostas want under three. Put each where its hours really are.
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Shade Map measures your house and the trees around it, then shows you sun and shade on your own ground at any hour of any day of the year.
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123 Main Street
Decatur, GA · example
Where the sun is, right now
Drag through the day
Plan your own home, any hour, any day
Shade Map measures yours, the house, the trees around it, and where the light lands at any hour of any day of the year.Drag through a day on one house. On the right, what Shade Map shows you at that same moment: the shade on the ground, and what is in sun.
An example home in Atlanta, to scale: the house and its five trees, every shadow cast by the sun's true position. It shifts between the photo and the plan Shade Map draws from it.
3:23 PM
6.0 h of sun on the garden, June 21
Yellow is daylight, black is night, for Atlanta. Drag across it to read any day.
October 2
Atlanta: 14 h 24 m of daylight on June 21, 9 h 54 m on December 19. The steps in March and November are the clocks changing.
Plant labels mean hours: full sun is six or more, part shade three to six, shade under three. This is every patch of the example yard, counted every ten minutes from sunrise to sunset.

6.0 h in June, 7.8 h in December
Tomatoes want six hours. Hostas want under three. Put each where its hours really are.

6.8 h of direct sun on the south roof, December 21
Winter sun is what panels miss. Know what each face of the roof gets before you get quotes.

Shaded 3:19 PM to 6:44 PM, July afternoons
Find where the patio is cool at five in July before you pour concrete or plant a hedge.

December light, before you make an offer
A listing shows one sunny afternoon. See what the yard and the roof get in midwinter.
Figures for the example yard above, worked out the way Shade Map works out yours.
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It depends on the day of the year and on what stands between the sun and the ground: your house, your neighbours' houses and your trees. Shade Map measures your house and the trees around it, then counts the hours of direct sun on every patch of your yard for any day you choose.
Garden centres use hours of direct sun a day. Full sun is six hours or more, part sun or part shade is three to six hours, and full shade is less than three. Shade Map gives you those hours for each spot, in midsummer and in midwinter.
Shade Map is powered by measure.so technologies. It measures your house and the trees around it, then works out where the sun is for your exact location, minute by minute, on any day of the year.
Yes. The tallest trees around your house are measured one by one: where each stands, how tall it is and how wide its crown spreads. Smaller trees are not modelled, so the hours of sun shown are a best case, most of all in winter, when a low sun reaches furthest through the trees.
It works for homes across most of the United States. It measures houses, not campuses: a building more than about 260 metres (850 feet) across is too large to measure.
No. Hours of sun are the hours the sun is clear of your house and trees: the most a cloudless day can give that spot. For gardening and siting that is the number you want, since plant labels and solar installers both start from it.
You can see how much direct sun each part of your roof gets in summer and in winter, and how much of it your trees take. It does not estimate energy output. Use it to know which roof faces are worth quoting before an installer visits.
Where the sun is over any address right now, with today's sunrise, sunset and day length, is free and needs no account. Everything else (measuring your house and trees, any hour of any day, hours of sun on every spot) is $24.99, paid once. There is no subscription.
It measures the same way, powered by measure.so technologies. The web version and the iPhone app are bought separately for now.