November 2024: Frost Predicted & Final Warm Season Harvest
The Old Farmer's Almanac had our first frost date as November 1st. The Farmers' Almanac (similar name but different) had it as November the 4th. The National Weather Service had predicted patchy frost for us on November the 21st but it didn't materialize. We had pulled in our frost sensitive crops all the same:
Fun fact: Our hardiness zone has been changed from zone 7B to 8A. So, yeah, climate change is real.
If you're new to gardening, then you'll hear a lot about hardiness zones, but there's more to it than that.
Hardiness zone *only* tells you about how cold you can expect your coldest temperatures in winter to be, but people try to use it for a lot more than that. Here's one example for the US:
Another thing that's important to know if you want to grow perennials, particularly things like gooseberries and apples, is how many chill hours (iirc, hours between 45f and freezing) you get, which is shown in this next map:
I'm guessing North Dakota is in that little bubble because they spend so much of winter below freezing, which doesn't count toward chill hours.
A third consideration, which comes in handy when someone who's used to Texas thinks you should be able to grow papayas near Seattle because it's also zone 8 for hardiness, is the heat zone you're in. Heat zone measures how many days above 85f a location got, historically. Either last year was a huge anomaly (let's hope) or this desperately needs to be updated:
When you combine these three, it gives you a better idea of what you can grow, and what will thrive in your area.
By the way, here's a Chill hours chart from One Green World nursery:
Fruit Tree Chill Hours Chart
Almond: 400-600
Walnut: 800-100
Filbert (Hazelnut): 800-1300
Chestnut: 300-500
Pistachio: 550-800
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Apple: 700-1000 (Low chill varieties between 200-500)
Apricot: 500-800
Peach: 600-1000 (low chill varieties between 300-500)
Nectarine: 100-500
Asian Pear: 400-500
European Pear: 600-800
Japanese Plum: 500-900
European Plum: 700-1000
Pluot: 400-800 (Low chill varieties between 200-300)
Find Your Chill Hours (Map Diagram) For Deciduous Fruit Trees
Chill hours are important because they help break the dormancy of certain plants, particularly deciduous fruit trees, allowing them to grow, bloom, and fruit properly. During winter, plants enter a state of dormancy to conserve energy. The cold temperatures experienced during chill hours trigger physiological changes in the plant, signaling that it’s time to end dormancy and prepare for the…
The USDA has updated plant hardiness zones, and despite last winter’s impressive cold, we’ve jumped up a zone (to 5a from 4b in 2012; the average low went up by 6 degrees)
Hardiness zones are a (partial) climate description that’s been in existence for a bit over a century, though the government didn’t get involved in it until the ’60s (At which point they proceeded to do so badly for a few…
North America is divided into 10 zones based on average yearly low temperatures. These zones are called Hardiness Zones. All tree species thrive in certain temperatures, and you can easily find the right tree species for your local temperature range by knowing which zone you are in.
Utah is very unique in that it contains 4 different hardy zones, zones 4-8. While we are predominantly zone 6, we still have the other 3 zones in our beautiful state. This means that you’re able to have a wider range of trees that are able to thrive in your yard than anywhere else in the nation! The Colorado Blue Spruce does great in zones 2-7, Austrian Pine thrives in 4-8, Bristlecone Pine does well in 3-7, and the Pinyon Pine is hardy in zones 5-8. This is great news for you as these are the four main trees that we offer, and all of them are grown locally so they’re already used to the weather conditions.
We’ve got a great hardiness zone tool that will let you know what zones you’re located in. All you have to do is enter in your zip code and it’ll populate the zones that are best for where you’re currently living. Once you’ve figured out your zones you can get to work on planning your yard around the trees and other foliage that’ll do best in your yard.
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