Zone Maps
 
Average Temperatures in Florida
Chill Hour Accumulation in Florida from the University of Florida
Chill Hours Calculator and details of El Niño and La Niña at AgroClimate ext. link
Confused by Plant Hardiness Zones? from the University of Florida, Columbia County pdf
Counties of Florida Map from the United States Census Bureau
Florida Chill Hours Map from the University of Florida
Freeze/Frost Occurrence Data Florida Listings from National Climatic Data Center Stations pdf
Plant Hardiness Zone Map from the USDA Agricultural Research Service
Plant Growth Factors: Temperature Publication From Colorado State University Extension pdf
USDA Plant Hardiness Zone (Interactive) Look up your area by zip code ext. link
US Drought Monitor at the National Drought Mitigation Center ext. link
Weather Resources: links at the University of Florida ext. link

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Florida Chill Hours Map

The University of Florida Institute of Food and Agricultural Science (UF-IFAS) tabulates chill hours (as opposed to average minimum temperature) in more detail for Florida and their map can be used to identify the expected range of chill hours for areas in Florida.

Be sure to match your plants by Hardiness Zone and by Chill Hours.

In order to bloom in spring, deciduous fruit trees like peaches, plums, and nectarines all must go through the plant equivalent of a long winter's nap.

They need a dormancy period with a certain number of chilling hours, when the temperature drops below 45 degrees Fahrenheit. The exact number of chilling hours depends on the fruit tree variety, but it can be anywhere from a hundred to more than a thousand.

Here in Florida, gardeners should look for special "low chill" fruit tree varieties. Low-chill peaches, plums, and nectarines need just 100 to 525 chilling hours per year, making them better suited for our mild winters. Low-chill apples are also available, though there are fewer varieties that work well in Florida. 1


Hardiness Zone Map of Florida
Fig. 1 

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Chill Hour Accumulation in Florida

Chill Hour Accumulation in Florida
Fig. 2

Below 45F (7.2C) through February 10th

There are many sources from which to gather this data, including the Florida Automated Weather Network FAWN. The state of Florida has several zones with different chill unit accumulations to aid in selecting a peach cultivar. 2

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Counties of Florida Map

Map showing Florida Counties
Fig. 3

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Plant Hardiness Zone Map

Florida Plant Hardiness Zone Map
Fig. 4

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Average Temperatures in Florida

Average high and low temperatures for various Florida cities
Fig. 5



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Bibliography

1 "Chill Hours." gardeningsolutions.ifas.ufl.edu. Gardening Solutions, UF/IFAS. 23 Oct. 2013. Web. 10 Aug. 2016.
2 Olmstead, Mercy, Chaparro, Jose, Andersen, Pete, Williamson, Jeff and Ferguson,James. "Florida Peach and Nectarine Varieties." edis.ifas.ufl.edu. This document is Circ. 1159, a publication of the Horticultural Sciences Department, UF/IFAS Extension First published Nov. 1995 under the title, "Peaches and Nectarines for Central and North Florida." Revised May 2013. Web. 4 Sept. 2014.

Illustrations

Fig. 1 Florida Chill Hours Map. N.d. ifas.ufl.edu. Web. 12 Apr. 2014.
Fig. 2 Chill Hour Accumulation in Florida (Below 45F [7.2C] through February 10th). N.d. edis.ifas.ufl.edu. Outline map courtesy of the Florida State Historical Society. Web. 16 Apr. 2015.
Fig. 3 State Based County Outline Map - Florida. General Reference Maps. 7 Oct. 2002. census.gov/geography.html. Web. 9 Aug. 2016.
Fig. 4 USDA Plant Hardiness Zone Map Florida, 2012. planthardiness.ars.usda.gov. Web. 9 Aug. 2016.
Fig. 5 Average high and low temperatures for various Florida cities. N.d. en.wikipedia.org. Web. 10 Aug. 2016.


Published 19 Feb 2013 KJ. Last Update 17 Nov. 2016 LR
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