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7 Cards in this Set
- Front
- Back
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Cardinal Temperature
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the temperature range in which plants grow and survive
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MINIMUM CARDINAL TEMPERATURE
a) growth |
40-50 oF (5-6 oC) for most species
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MINIMUM CARDINAL TEMPERATURE
b) survival |
1) tender or chilling sensitive: 32 to 45 oF (0 to 7 oC)
2) semi-hardy plants: 15 to 29 oF (-9 to -2 oC) 3) hardy plants: less than 0 oF (-18 oC) |
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OPTIMUM TEMPERATURE
a) cool-season plants |
grow best at 65-75 oF (18-24 oC)
1) in southern U.S.: grow as fall-winter crops. 2) in northern U.S.: grow in late spring, summer, early fall |
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OPTIMUM TEMPERATURE
b) warm-season plants |
grow best at 78-90 oF (24-32 oC)
1) in southern U.S.: grow in late spring and summer, early fall 2) in northern U.S.: grow in summer, but for some warm season crops the growing season may be too short to get good yield. |
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MAXIMUM CARDINAL TEMPERATURE
a) growth |
90-96 oF (32-36 oC), most species
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MAXIMUM CARDINAL TEMPERATURE
b) survival |
130 oF (54 oC), most species
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