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Chill Hours
This chart
of chill hours was released from research stations on the southeast
chill hours. High
chill will not produce in the lower chilling regions, however low
chilling plants will produce in the higher but caution must be
taken to prevent
freeze damage if low chill varieties are planted farther north.
If chill hours are satisfied on low chill varieties in November
and December they will begin producing flowers in January and are
subject to freeze damage. |
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Frost Protection
Most
of the Southern Highbush planted in the Southeastern United States
are protected with overhead irrigation for frost and freeze protection.
Proper design of a system is important to insure adequate protection
for different cold events. If too little water is used, then more
damage may occur then if it was left unprotected. |
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Water Application Rates based on Wind Speed & Temperature
Frost /Freeze Protection Using Solid Set Irrigation Equipment by Dr. Dale Linvill
Agricultural Weather Office, Clemson University
The following tables contain water application rates for several wind speed and temperature combinations. These are estimated sprinkling rates required for col protection for a 2 cm leaf. The temperature is for a dr unprotected leaf. (After J.D. Martsolf in Barfield, B.J., and J.F. Gerber. 1979. Moderation of the Aerial Environment of Crops. ASAE St. Joseph MI.)
Temperature C |
| Wind Speed (m/s) |
|
| Application Rates (cm/hr) |
|
|
| 0.14 |
0.19 |
0.23 |
0.27 |
0.30 |
0.32 |
| 0.21 |
0.29 |
0.35 |
0.40 |
0.44 |
0.48 |
| 0.29 |
0.39 |
0.47 |
0.53 |
0.59 |
0.64 |
| 0.36 |
0.49 |
0.58 |
0.57 |
0.74 |
0.80 |
| 0.43 |
0.58 |
0.70 |
0.80 |
0.89 |
0.97 |
| 0.50 |
0.68 |
0.82 |
0.93 |
1.03 |
1.13 |
| 0.57 |
0.78 |
0.93 |
1.07 |
1.18 |
1.29 |
|
Application rate for cold protection under different wind ad temperature conditions. (From Extension Circular 287 by Gerber and Martsolf, Florida Agricultural Extension Service.)
Temperature F |
| Wind Speed (mph) |
|
| Application Rates (in/hr) |
|
|
| 0.10 |
0.10 |
0.10 |
| 0.10 |
0.10 |
0.14 |
| 0.10 |
0.16 |
0.30 |
| 0.12 |
0.24 |
0.50 |
| 0.16 |
0.30 |
0.60 |
| 0.20 |
0.40 |
0.70 |
| 0.26 |
0.50 |
0.90 |
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Variety Specs
| Southern |
Highbush |
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Varieties |
Bush Habit |
|
Chill Hours |
|
Vigor |
|
Berry Quality |
|
Berry Size |
|
Released By |
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| Abundance |
upright |
|
300 |
|
5 |
|
3 |
|
5 |
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Florida |
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| Emerald |
spreading |
|
200-300 |
|
5 |
|
5 |
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5 |
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Florida |
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| Farthing |
semi-sprdg |
|
low |
|
4 |
|
3 |
|
4 |
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Florida |
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| Gulf
Coast |
upright-sprdg |
|
200-300 |
|
5 |
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3 |
|
3 |
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Mississippi |
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| Jewel |
upright-sprdg |
|
250 |
|
3 |
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4 |
|
4 |
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Florida |
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| Lenior |
semi-sprdg |
|
600-700 |
|
3 |
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3 |
|
3 |
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North Carolina |
| |
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| Palmetto |
spreading |
|
400-450 |
|
4 |
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4 |
|
3 |
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Georgia |
| |
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| Primadonna |
upright |
|
200 |
|
4 |
|
4 |
|
5 |
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Florida |
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| Rebel |
spreading |
|
400-450 |
|
5 |
|
3 |
|
5 |
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Georgia |
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| Santa Fe |
upright |
|
350 |
|
4 |
|
3 |
|
4 |
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Florida |
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| Scintilla |
semi-upright |
|
not available |
|
4 |
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5 |
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5 |
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Florida |
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| Springhigh |
upright |
|
150-200 |
|
4 |
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3 |
|
5 |
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Florida |
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| Springwide |
spreading |
|
low |
|
3 |
|
5 |
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5 |
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Florida |
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| Star |
upright-sprdg |
|
400-500 |
|
3 |
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5 |
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5 |
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Florida |
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| Sweetcrisp |
spreading |
|
not available |
|
5 |
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5 |
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3 |
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Florida |
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| Windsor |
semi-sprdg |
|
400 |
|
5 |
|
4 |
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5 |
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Florida |
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| Rabbiteye |
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Varieties |
Bush Habit |
|
Chill Hours |
|
Vigor |
|
Berry Quality |
|
Berry Size |
|
Released By |
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| Alapaha |
upright |
|
450-500 |
|
4 |
|
3 |
|
3 |
|
Georgia |
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| Brightwell |
upright |
|
350-400 |
|
4 |
|
5 |
|
3 |
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Georgia |
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| Ochlocknee |
upright |
|
650-700 |
|
4 |
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3 |
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Georgia |
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| Powderblue |
spreading |
|
550-650 |
|
4 |
|
3 |
|
3 |
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North Carolina |
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| Premier |
upright |
|
550 |
|
5 |
|
3 |
|
4 |
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North Carolina |
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| Vernon |
upright |
|
500-550 |
|
5 |
|
5 |
|
5 |
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Georgia |
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Scale
: 5 - Excellent 4 - Very
good 3 - Good 2 - Fair 1 - Poor
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phone: (352) 481-5558 • fax: (352) 481-5093 • 2600 SE 193rd Ave • Hawthorne, Florida • 32640
©2008 Island Grove Ag Products
sland Grove Ag Products origin
as a merger between two existing blueberry farms in north central Florida. The focus at that time was to produce quality blueberry plants and increase production in our own fields.
IGAP also participates in community functions in Hawthorne, our closest town. Most notably is the clean-up and recovery of the City Park at Lake Johnson in which we contributed labor, equipment and plant material for this clean-up and enhancement project. At the local high school, we donated and built a fruit orchard at the agricultural department hoping to inspire young adults to learn more about agriculture and fruit production. The orchard contains blueberries, blackberries, grapes, pears, peaches, plums and persimmons.