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https://www.gardeningknowhow.com/edible/fruits/apples/chill-hours-for-apple-trees.htm#:~:text=Most%20apple%20varieties%20need%20500-1%2C000%20chill%20hours%20or,and%20can%20withstand%20hotter%20summers%20than%20other%20varieties.
https://www.gardeningknowhow.com/edible/fruits/apples/chill-hours-for-apple-trees.htm
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 …
https://www.orangepippintrees.com/articles/fruit-tree-advice/fruit-tree-minimum-chill-requirement
Most apple varieties have a chill requirement of about 1,000 hours or more, which is readily achieved in the temperate apple-growing regions of the USA, South America, South Africa, Australia, New Zealand, and Europe.
https://harvesttotable.com/fruit-tree-chill-hours/
Apples, peaches, and apricots are fruit trees most affected by chill hours. Apples have the highest chilling requirements of all fruit trees, followed by apricots and, then, peaches. ‘Fuji’ and ‘Gala’ apple varieties require 900 chill hours; ‘Dorset Golden’ apple requires just 100 chill hours.
https://www.plantmegreen.com/pages/plant-hardiness-zones-and-chill-hours
In fact, Israeli research has resulted in the Apple Ein Shemer variety that needs only approximately 300 chill hours, making it a very good choice for Southern gardeners who can finally get good apples to grow as far south as Zone 9.
https://www.groworganic.com/blogs/articles/chill-hours-what-are-they-how-do-i-count-them-and-why-do-my-fruit-trees-car
Pears – most require over 300 chill hours. Asian pears require the lowest chill hours of all pears. Figs, Pomegranates, Quince, Persimmons – all require 300 or less chill hours; Special Hybrids – Spice Zee Nectaplum or Flavor Delight Aprium; The majority of the fruit and nut trees require higher chill hours.
https://ask2.extension.org/kb/faq.php?id=344797
Chill hours are the number of hours between the temperatures of 32 and 45 degrees Fahrenheit. Most apple cultivars have a chill requirement of 750 to 1000 hours. Unfortunately, because of their high chill requirements, most apple cultivars cannot be successfully grown in Arkansas, Tennessee, and Georgia.
https://www.davewilson.com/home-garden/fruit-variety-recommendations/fruit-tree-chilling-requirement/
Varieties adapted to colder climates usually, but not always, have chilling requirements of 800-1,000 or more hours. In the coldest fruit tree climates, though, growers are little concerned with chilling requirements; almost all varieties receive their chilling requirement early in winter.
https://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1269.pdf
sweet apple. Chilling requirement of 100 hours. Self-fruitful.!Gordon: Produces a reddish-green fruit for fresh use and cooking. Chilling requirement, 400 hours. Self-fruitful. Castlebrite: Firm and juicy. Good flavor when fully ripe, oth-erwise somewhat tart. Good size. Bright orange with red blush. 450 chill hours. Self-fruitful.
https://gardeningsolutions.ifas.ufl.edu/plants/edibles/fruits/apples.html
Apples were once only grown in the northern regions of the U.S., but with varities like 'Anna,' 'Dorsett Golden,' and 'TropicSweet,' Florida gardeners can now successfully grow apples as well. To produce fruit, these varieties need about 300 to 400 hours below 45 degrees during the winter, so they’ll do well in central or north Florida.
https://www.willisorchards.com/product/ein-shemer-apple-tree
The Ein Shemer is an excellent multi-use southern apple that ripens mid-June to early July, after the Anna Apple Tree. The Ein Shemer Apple Tree is a self-fertile apple tree. Check out this apple tree for sale today! 100 chill hours.
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