What Growing Zone Is Richey?

Our records indicate the United States Department of Agriculture has given Richey a growing zone designation of 4a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Richey's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Richey's weather data from 1991 - 2020 in their analysis.

Latest MT growing zone map

If you are looking for plants suitable for growing in the Richey area, head on over to our page on plants that grow well in Richey, MT.

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Brass Watering Can

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Raised Garden Bed Kit

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Latest MT growing zone map

The growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since Richey is in growing zone 4a this means that plants there can survive temperatures as low as -30 to -25 degrees Fahrenheit. Plants for Richey's climate should be chosen with this in mind, or plants should be moved inside to keep their core temperature in the right range if necessary.

Some zones may have been changed by the USDA as of 2023. To see if the Richey area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That’s not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!

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Hardiness Zone FAQ

Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Richey, MT.

The USDA hardiness zone is 4a for Richey. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Richey's Growing Zone Details

USDA Growing Zone: 4a

Zip Codes:

59259

Longitude: -105.0696

Latitude: 47.6439

Lowest Avg Temperatures (F): -30 to -25

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Map of the Richey Area

All Towns In MT

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Helena Valley Southeast Helena Valley West Central Helena West Side Helmville Heron Herron Hidden Lake Colony Highwood Hilger Hilldale Colony Hillside Colony Hingham Hinsdale Hobson Hogeland Homestead Horizon Colony Hot Springs Hungry Horse Huntley Huson Hysham Indian Springs Inverness Ismay Jackson Jardine Jeffers Jefferson City Jette Joliet Joplin Jordan Judith Gap Kalispell Kerr Kevin Kicking Horse Kila Kilby Butte Colony King Arthur Park King Ranch Colony Kings Point Kingsbury Colony Klein Kremlin Lake Mary Ronan Lakeside Lakeview Lame Deer Landusky Laredo Laurel Lavina Lewistown Lewistown Heights Libby Lima Lincoln Lindisfarne Lindsay Little Bitterroot Lake Little Browning Livingston Lockwood Lodge Grass Lodge Pole Logan Lolo Loma Lonepine Loring Colony Luther Malmstrom AFB Malta Mammoth Manhattan Marion Martin City Martinsdale Marysville Maverick Mountain Maxville McAllister Medicine Lake Melstone Midway Colony Miles City Milford Colony Miller Colony Missoula Moccasin Monarch Montana City Montaqua Moore Mountain View Colony Muddy Musselshell Nashua Neihart New Miami Colony New Rockport Colony Niarada Nibbe Norris North Browning North Harlem Colony Noxon Nye Old Agency Olney Opheim Orchard Homes Outlook Ovando Pablo Paradise Park City Parker School Peerless Pendroy Philipsburg Piltzville Pine Creek Pinesdale Pinnacle Pioneer Junction Plains Pleasant Valley Colony Plentywood Plevna Polebridge Polson Pompeys Pillar Pondera Colony Ponderosa Pines Pony Poplar Potomac Power Prairie Elk Colony Pray Pryor Racetrack Rader Creek Radersburg Rapelje Ravalli Raynesford Red Lodge Redstone Reed Point Reserve Rexford Rhodes Riceville Richey Rimini Rimrock Colony Riverbend Riverview Colony Roberts Rockport Colony Rockvale Rocky Boy West Rocky Boy's Agency Rocky Point Rollins Ronan Roscoe Rosebud Roundup Roy Rudyard Ryegate Saco Saddle Butte Sage Creek Colony Saint Mary Saltese Sand Coulee Sangrey Santa Rita Sapphire Ridge Savage Scobey Sedan Seeley Lake Seville Colony 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Plants For Other States

Looking for the best plants in a different area of the United States? Click on a button below to find plants that are ideal for that state's temperatures.

Seed Starting Trays

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