chill hours by zip code

How are chill hours calculated?

Counting the Hours

One way to calculate chill hours is to count the number of hours with a temperature below 7°C (45°F). A slightly more accurate model excludes hours below freezing (as these do not contribute towards dormancy) and only counts those spent between 0°C (32°F) and 7°C (45°F).

How many chill hours does Zone 9 get?

Chilling Hours

Zone 8a 700+ Chill hours includes southern SC west to central TX	Premier, Climax Blueberry
Zone 9b 110-310 Chill hours includes extreme south TX	Anna, Dorsett Golden Apple, FlordaPrince, FlordaBest Peach, Tropic Beauty, Tropic Snow Peach, Sunhome Nectarine, Sharp, Misty, Gulf Coast Blueberry

How many chill hours does Zone 10 get?

Chilling requirement is a concern for USDA zones 9B and 10, predominately in Southern and coastal regions where chilling hours average 100 to 600 per year. If you are within this area, take note of the chilling requirements listed for fruits and choose accordingly.

What temperature is considered chill hours?

Chill Hours (sometimes called Chill Units) are an approximation of how many hours of weather between 32 degrees and 45 degrees (F) a plant requires to properly go dormant so it can wake up and blossom and/or set fruit. Some plants, like fruit trees and certain flowers, require a minimum number of chill hours to thrive.

How many chill hours do apples need?

Most apple varieties need 500-1,000 chill hours or temps below 45 F. (7 C.) but there are some low chill varieties available that need no more than 300 chill hours. Low chill varieties need less than 700 chill hours and can withstand hotter summers than other varieties.

How many chill hours do pistachios need?

Fruit & Nut Crop Chill Portions Requirements

Crop	Cultivar	Chill Portions
Pistachio	Peters²^,¹⁰	58-65
Pistachio	Sirora¹²	60
Prune	Improved French¹⁰	55-60
Walnut	Chandler¹⁰	45-50

What is a low chill fruit tree?

Chill hours are the amount of time the fruit trees have spent below 45 degrees Fahrenheit. Low chill fruit trees, such as stone fruit, as well as nut trees, require a specific number of hours each winter to regulate growth.

What are chill hours for blueberries?

Blueberry bushes need a minimum number of chill hours by variety each winter to enhance their fruiting. Chill hours are defined as hours less than 45°F but above 32°F. If a blueberry bush doesn't experience enough chill hours in the winter, the flower buds might not open at all in spring, or they might open unevenly.

Do chill hours need to be consecutive?

It is important to know that the Chilling Hours do not need to be consecutive. Typically, the plant just needs cumulative Chilling Hours. ... If we have enough nights doing that, then that may be enough for most plants. On the flip side, some plants have hair triggers to break out of dormancy.

How many chill hours do peaches need?

Standard peach cultivars have winter chill requirements of 450 to 1,200 hours below 45 F between November 1 and the end of February. Those peach trees will not flower and set fruit in warmer climates.

How many chill hours does Houston get?

Within the Harris County area, Pasadena and the Galveston Bay area on the south side of the county receive approximately 350–450 chill hours; downtown Houston receives approximately 450 hours; Cypress and the Bear Creek area receive approximately 600 hours.

What are the best fruit trees for Zone 9?

Zone 9 Fruit Tree Varieties

Owardi satsuma mandarin orange (Citrus reticulata 'Owari')
Calamondin (Citrus mitis)
Meyer lemon (Citrus x meyeri)
Marumi kumquat (Citrus japonica 'Marumi')
Trifoliate orange (Citrus trifoliata)
Giant pummelo (Citrus pummel)
Sweet Clementine (Citrus reticulata 'Clementine')

What is chill time?

chilltime(Noun) To relax, layback in a particular moment or hour. chilltime(Verb) To work hard in a short period of time.

Do plum trees need chill hours?

Many fruit and nut trees that grow in temperate climates (climates that are moderate rather than extremely cold or hot) have chill hour requirements. Most temperate fruits, such as figs, pomegranates, olives, apples, pears, peaches, and plums require 200 to 2000 chill hours in the winter.

What is the chilling temperature?

Chilling is the application of temperatures in the range of 0°C to 8°C, i.e. above the freezing point of the food, while freezing uses temperatures well below the freezing point, conventionally below 18°C. The difference between the two processes goes beyond the difference in temperature.

Do strawberries need chill hours?

In strawberries, hours accumulated of temperatures between 28 and 45 degrees Fahrenheit are considered to be effective and are counted as towards chill requirement. Chill requirement in strawberry is made up of two essential parts.

Can apples grow in warm climates?

It is possible to grow apples in hot climates like zone 8, although the variety is considerably more limited than it is in cooler areas. In order to set fruit, apple trees need a certain number of “chill hours,” or hours during which the temperature is below 45 F.

Can you grow apples in hot climate?

Shri Hariman Sharma a renowned progressive farmer hailing from Paniala village of Bilaspur district has developed an apple variety that can be grown in plain, tropical and subtropical areas.
...
HRMN 99 Apple Plant (Hot climate Variety)

Soil Specific	Loamy, Well Drained
Type Of Seed	Hrmp 99
Height when Fully Grown	15 to 20 ft

What is a chill portion?

Chill hours counts any hour between 32°-45° F as the same. Chill portions gives different chill values to different temperatures. No more wondering about the value of 'warm' chill hours. Temperatures between 43°-47° F have the most chill value.

How many chill hours do almonds need?

The chilling requirement for almonds is 200-300 hours.