Enough sun for tomatoes? SunCalc figures it out

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Luster Leaf is best known for digital monitors that check the pH and moisture levels of your soil, but the company’s SunCalc targets a different variable: light. The “sunlight calculator” measures the amount of sunshine that actually reaches a specific spot during a 12-hour period -- key to determining which plants should go where. A University of Maine global warming monitoring station put the SunCalc through its paces, and it ultimately performed on a par with the school’s radiometer. The device costs about $30. To find retailers, click here.

-- Jeff Spurrier

Photo credit: Courtesy of Luster Leaf