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规划 › 种植时间 › Garlic
种植时间

什么时候种 Garlic

没有哪一个日期放之四海而皆准。Garlic 的种植时间是相对你自己的终霜来定的，所以答案 从 November 20 （San Diego, CA） 一直排到 April 25 （Burns, OR）。 在下面找你所在的城镇。

简短版

怎么下地cloves/sets
露地定植 终霜前 47 天到终霜前 16 天
收获天数240–300
耐寒程度hardy
传统月相亏凸月
值得一提：Garlic is a fall crop: Maryland says October 15-November 15 against a first frost of about October 31, and Penn State says 'a good three weeks prior to the ground freezing' so roots form but shoots do not emerge. Spring planting works but Maryland notes fall-planted garlic outproduces it. Harvest the following July, hence 240-300 days.

这其实是一种秋播作物。下面的春播日期也能用，不过 garlic 秋天种下去明显长得更好。请看秋播那一列。

在你所在的城镇，什么时候种 garlic

这里的每个日期都是按当地自己的霜冻日期算出来的——有气象站的地方用 NOAA 实测站点常态值， 没有的地方则由周边气候网格推算。“最佳月相日”是时间窗内落在该作物传统月相上的那几天。

地点分区 露地定植 秋季播种 最佳月相日
Birmingham, AL 8a Feb 2 – Mar 5 Oct 12 – Dec 2 Feb 2–7
Greensboro, AL 8b Jan 29 – Mar 1 Oct 12 – Dec 2 Feb 2–7
Hoover, AL 估算 8b Feb 1 – Mar 4 Oct 11 – Dec 1 Feb 2–7
Huntsville, AL 估算 8a Feb 10 – Mar 13 Oct 5 – Nov 25 Mar 4–9
Mobile, AL 9a Jan 5 – Feb 5 Nov 6 – Dec 27 Jan 5–9, Feb 2
Montgomery, AL 估算 8b Jan 25 – Feb 25 Oct 16 – Dec 6 Feb 2–7
Tuscaloosa, AL 估算 8a Feb 1 – Mar 4 Oct 11 – Dec 1 Feb 2–7
Anchorage, AK 5b Mar 19 – Apr 19 Sep 1 – Oct 22 Apr 2–7
Badger, AK 估算 2a Mar 27 – Apr 27 Aug 10 – Sep 30 Apr 2–7
Bethel, AK 4a Apr 4 – May 5 Aug 23 – Oct 13 Apr 4–8, May 2
Eagle River, AK 估算 5a Mar 25 – Apr 25 Aug 25 – Oct 15 Apr 2–7
Fairbanks, AK 2a Mar 27 – Apr 27 Aug 14 – Oct 4 Apr 2–7
Juneau, AK 7a Mar 18 – Apr 18 Sep 3 – Oct 24 Apr 2–7
Ketchikan, AK 8a Mar 6 – Apr 6 Sep 23 – Nov 13 Mar 6–10, Apr 2
Kodiak, AK 7b Mar 19 – Apr 19 Sep 3 – Oct 24 Apr 2–7
Nome, AK 4a Apr 19 – May 20 Aug 4 – Sep 24 May 2–7
Flagstaff, AZ 6a Apr 18 – May 19 Aug 29 – Oct 19 May 2–7
Phoenix, AZ 10a Nov 22 – Dec 23 Nov 25 – Jan 15 Dec 5–10
Tucson, AZ 9b Dec 20 – Jan 20 Nov 9 – Dec 30 Jan 4–9
Fayetteville, AR 估算 7a Feb 20 – Mar 23 Sep 29 – Nov 19 Mar 4–9
Fort Smith, AR 估算 8a Feb 12 – Mar 15 Oct 4 – Nov 24 Mar 4–9
Little Rock, AR 8a Feb 2 – Mar 5 Oct 11 – Dec 1 Feb 2–7
Antioch, CA 估算 9b Dec 17 – Jan 17 Nov 6 – Dec 27 Jan 4–9
Arden-Arcade, CA 估算 9b Jan 6 – Feb 6 Nov 1 – Dec 22 Jan 6–9, Feb 2–3
Bakersfield, CA 9b Dec 15 – Jan 15 Nov 8 – Dec 29 Jan 4–9
Chico, CA 估算 9b Jan 13 – Feb 13 Oct 29 – Dec 19 Feb 2–7
Chino, CA 估算 9a Jan 16 – Feb 16 Oct 29 – Dec 19 Feb 2–7
Citrus Heights, CA 估算 9b Jan 6 – Feb 6 Nov 1 – Dec 22 Jan 6–9, Feb 2–3
Clovis, CA 估算 9b Dec 28 – Jan 28 Nov 4 – Dec 25 Jan 4–9
Elk Grove, CA 估算 9b Dec 22 – Jan 22 Nov 6 – Dec 27 Jan 4–9
Eureka, CA 9b Jan 20 – Feb 20 Oct 31 – Dec 21 Feb 2–7
Fontana, CA 估算 9a Jan 20 – Feb 20 Oct 26 – Dec 16 Feb 2–7
Fresno, CA 9b Nov 28 – Dec 29 Nov 14 – Jan 4 Dec 5–10
Hesperia, CA 估算 9a Jan 20 – Feb 20 Oct 26 – Dec 16 Feb 2–7
Lancaster, CA 估算 8b Feb 7 – Mar 10 Oct 18 – Dec 8 Feb 7–8, Mar 4–7
Modesto, CA 估算 9b Dec 30 – Jan 30 Nov 3 – Dec 24 Jan 4–9
Oceanside, CA 9b Dec 31 – Jan 31 Nov 8 – Dec 29 Jan 4–9
Ontario, CA 估算 9a Jan 16 – Feb 16 Oct 29 – Dec 19 Feb 2–7
Palmdale, CA 估算 8b Feb 7 – Mar 10 Oct 18 – Dec 8 Feb 7–8, Mar 4–7
Pomona, CA 估算 9a Jan 16 – Feb 16 Oct 29 – Dec 19 Feb 2–7
Rancho Cucamonga, CA 估算 9a Jan 16 – Feb 16 Oct 29 – Dec 19 Feb 2–7
Redding, CA 9a Jan 15 – Feb 15 Oct 22 – Dec 12 Feb 2–7
Rialto, CA 估算 9a Jan 20 – Feb 20 Oct 26 – Dec 16 Feb 2–7
Roseville, CA 估算 9b Jan 6 – Feb 6 Nov 1 – Dec 22 Jan 6–9, Feb 2–3
Sacramento, CA 9b Dec 17 – Jan 17 Nov 2 – Dec 23 Jan 4–9
Salinas, CA 估算 9b Dec 14 – Jan 14 Nov 12 – Jan 2 Jan 4–9
San Bernardino, CA 估算 9a Jan 20 – Feb 20 Oct 26 – Dec 16 Feb 2–7
San Diego, CA 10b Nov 20 – Dec 21 Dec 1 – Jan 21 Dec 5–10
San Jose, CA 估算 9b Dec 24 – Jan 24 Nov 11 – Jan 1 Jan 4–9
Santa Clara, CA 估算 9b Dec 24 – Jan 24 Nov 11 – Jan 1 Jan 4–9
Santa Maria, CA 9b Dec 19 – Jan 19 Nov 13 – Jan 3 Jan 4–9
Stockton, CA 估算 9b Dec 26 – Jan 26 Nov 3 – Dec 24 Jan 4–9
Tracy, CA 估算 9b Dec 26 – Jan 26 Nov 3 – Dec 24 Jan 4–9
Vacaville, CA 估算 9b Dec 17 – Jan 17 Nov 6 – Dec 27 Jan 4–9
Victorville, CA 估算 8b Jan 28 – Feb 28 Oct 18 – Dec 8 Feb 2–7
Visalia, CA 估算 9b Dec 29 – Jan 29 Nov 3 – Dec 24 Jan 4–9
West Covina, CA 估算 9a Jan 16 – Feb 16 Oct 29 – Dec 19 Feb 2–7
Arvada, CO 估算 5b Mar 25 – Apr 25 Sep 3 – Oct 24 Apr 2–7
Aurora, CO 估算 6a Mar 19 – Apr 19 Sep 8 – Oct 29 Apr 2–7
Boulder, CO 估算 5b Apr 3 – May 4 Aug 27 – Oct 17 Apr 3–8
Centennial, CO 估算 6a Mar 19 – Apr 19 Sep 8 – Oct 29 Apr 2–7
Colorado Springs, CO 估算 6a Mar 27 – Apr 27 Sep 3 – Oct 24 Apr 2–7
Denver, CO 6a Mar 19 – Apr 19 Sep 9 – Oct 30 Apr 2–7
Fort Collins, CO 估算 5b Mar 31 – May 1 Aug 29 – Oct 19 Apr 2–7
Grand Junction, CO 7a Mar 7 – Apr 7 Sep 20 – Nov 10 Mar 7–10, Apr 2–3
Greeley, CO 估算 5b Mar 21 – Apr 21 Sep 4 – Oct 25 Apr 2–7
Highlands Ranch, CO 估算 6a Mar 19 – Apr 19 Sep 8 – Oct 29 Apr 2–7
Lakewood, CO 估算 5b Mar 25 – Apr 25 Sep 3 – Oct 24 Apr 2–7
Longmont, CO 估算 5b Apr 3 – May 4 Aug 27 – Oct 17 Apr 3–8
Pueblo, CO 5b Mar 14 – Apr 14 Sep 9 – Oct 30 Apr 2–7
Thornton, CO 估算 6a Mar 19 – Apr 19 Sep 8 – Oct 29 Apr 2–7
Westminster, CO 估算 5b Mar 25 – Apr 25 Sep 3 – Oct 24 Apr 2–7
Bridgeport, CT 估算 7a Mar 4 – Apr 4 Sep 24 – Nov 14 Mar 4–9
Danbury, CT 估算 7a Mar 4 – Apr 4 Sep 24 – Nov 14 Mar 4–9
East Norwalk, CT 估算 7a Mar 4 – Apr 4 Sep 24 – Nov 14 Mar 4–9
Hartford, CT 6b Mar 5 – Apr 5 Sep 16 – Nov 6 Mar 5–10
New Haven, CT 估算 7a Feb 27 – Mar 30 Oct 1 – Nov 21 Mar 4–9
North Stamford, CT 估算 7a Mar 5 – Apr 5 Sep 23 – Nov 13 Mar 5–10
Norwalk, CT 估算 7a Mar 4 – Apr 4 Sep 24 – Nov 14 Mar 4–9
Stamford, CT 估算 7a Mar 5 – Apr 5 Sep 23 – Nov 13 Mar 5–10
Waterbury, CT 估算 6a Mar 16 – Apr 16 Sep 12 – Nov 2 Apr 2–7
Dover, DE 估算 7b Feb 21 – Mar 24 Oct 2 – Nov 22 Mar 4–9
Wilmington, DE 估算 7a Feb 25 – Mar 28 Sep 30 – Nov 20 Mar 4–9
Downtown DC, DC 估算 7b Feb 19 – Mar 22 Oct 3 – Nov 23 Mar 4–9
Washington, DC 估算 7b Feb 19 – Mar 22 Oct 3 – Nov 23 Mar 4–9
Washington, D.C., DC 8a Feb 5 – Mar 8 Oct 19 – Dec 9 Feb 5–8, Mar 4–5
Gainesville, FL 估算 9a Jan 12 – Feb 12 Nov 6 – Dec 27 Feb 2–7
Tallahassee, FL 9a Jan 26 – Feb 26 Oct 24 – Dec 14 Feb 2–7
Athens, GA 估算 8a Feb 10 – Mar 13 Oct 8 – Nov 28 Mar 4–9
Atlanta, GA 8b Jan 27 – Feb 27 Oct 21 – Dec 11 Feb 2–7
Columbus, GA 估算 8b Feb 1 – Mar 4 Oct 14 – Dec 4 Feb 2–7
Johns Creek, GA 估算 8a Feb 13 – Mar 16 Oct 6 – Nov 26 Mar 4–9
Macon, GA 估算 8b Feb 1 – Mar 4 Oct 13 – Dec 3 Feb 2–7
Roswell, GA 估算 8a Feb 13 – Mar 16 Oct 6 – Nov 26 Mar 4–9
Sandy Springs, GA 估算 8a Feb 6 – Mar 9 Oct 11 – Dec 1 Feb 6–8, Mar 4–6
Savannah, GA 9a Jan 14 – Feb 14 Oct 31 – Dec 21 Feb 2–7
South Fulton, GA 估算 8a Feb 10 – Mar 13 Oct 7 – Nov 27 Mar 4–9
Boise, ID 7b Mar 8 – Apr 8 Sep 21 – Nov 11 Mar 8–10, Apr 2–4
Lewiston, ID 7b Feb 18 – Mar 21 Sep 26 – Nov 16 Mar 4–9
Meridian, ID 估算 7a Mar 21 – Apr 21 Sep 10 – Oct 31 Apr 2–7
Nampa, ID 估算 7a Mar 9 – Apr 9 Sep 14 – Nov 4 Mar 9–10, Apr 2–5
Pocatello, ID 6a Apr 6 – May 7 Aug 19 – Oct 9 Apr 6–8, May 2–4
Aurora, IL 估算 5b Mar 7 – Apr 7 Sep 20 – Nov 10 Mar 7–10, Apr 2–3
Champaign, IL 估算 6a Mar 4 – Apr 4 Sep 18 – Nov 8 Mar 4–9
Chicago, IL 6a Feb 28 – Mar 31 Sep 28 – Nov 18 Mar 4–9
Cicero, IL 估算 6a Mar 1 – Apr 1 Sep 26 – Nov 16 Mar 4–9
Elgin, IL 估算 5b Mar 11 – Apr 11 Sep 18 – Nov 8 Apr 2–7
Joliet, IL 估算 5b Mar 7 – Apr 7 Sep 20 – Nov 10 Mar 7–10, Apr 2–3
Naperville, IL 估算 5b Mar 7 – Apr 7 Sep 20 – Nov 10 Mar 7–10, Apr 2–3
Near North Side, IL 估算 6a Mar 1 – Apr 1 Sep 26 – Nov 16 Mar 4–9
North Peoria, IL 估算 5b Mar 4 – Apr 4 Sep 19 – Nov 9 Mar 4–9
Peoria, IL 估算 5b Mar 4 – Apr 4 Sep 19 – Nov 9 Mar 4–9
Rockford, IL 估算 5b Mar 11 – Apr 11 Sep 13 – Nov 3 Apr 2–7
Springfield, IL 估算 6a Feb 26 – Mar 29 Sep 21 – Nov 11 Mar 4–9
Waukegan, IL 估算 6a Mar 8 – Apr 8 Sep 23 – Nov 13 Mar 8–10, Apr 2–4
West Town, IL 估算 6a Mar 1 – Apr 1 Sep 26 – Nov 16 Mar 4–9
Bloomington, IN 估算 6a Mar 1 – Apr 1 Sep 22 – Nov 12 Mar 4–9
Carmel, IN 估算 6a Mar 1 – Apr 1 Sep 24 – Nov 14 Mar 4–9
Evansville, IN 7a Feb 16 – Mar 19 Sep 29 – Nov 19 Mar 4–9
Fort Wayne, IN 估算 6a Mar 12 – Apr 12 Sep 17 – Nov 7 Apr 2–7
Indianapolis, IN 6b Feb 24 – Mar 27 Sep 29 – Nov 19 Mar 4–9
South Bend, IN 估算 6a Mar 12 – Apr 12 Sep 20 – Nov 10 Apr 2–7
Cedar Rapids, IA 估算 5a Mar 15 – Apr 15 Sep 8 – Oct 29 Apr 2–7
Davenport, IA 估算 5b Mar 7 – Apr 7 Sep 16 – Nov 6 Mar 7–10, Apr 2–3
Des Moines, IA 5b Mar 2 – Apr 2 Sep 20 – Nov 10 Mar 4–9
Dodge City, KS 6b Mar 5 – Apr 5 Sep 20 – Nov 10 Mar 5–10
Goodland, KS 6a Mar 16 – Apr 16 Sep 11 – Nov 1 Apr 2–7
Kansas City, KS 估算 6b Feb 26 – Mar 29 Sep 24 – Nov 14 Mar 4–9
Lawrence, KS 估算 6b Feb 26 – Mar 29 Sep 24 – Nov 14 Mar 4–9
Olathe, KS 估算 6b Feb 23 – Mar 26 Sep 27 – Nov 17 Mar 4–9
Overland Park, KS 估算 6b Feb 23 – Mar 26 Sep 27 – Nov 17 Mar 4–9
Topeka, KS 估算 6b Feb 28 – Mar 31 Sep 21 – Nov 11 Mar 4–9
Wichita, KS 估算 7a Feb 24 – Mar 27 Sep 26 – Nov 16 Mar 4–9
Lexington, KY 7a Feb 25 – Mar 28 Sep 28 – Nov 18 Mar 4–9
Lexington-Fayette, KY 估算 6b Feb 28 – Mar 31 Sep 24 – Nov 14 Mar 4–9
Louisville, KY 估算 7a Feb 21 – Mar 24 Sep 30 – Nov 20 Mar 4–9
Meads, KY 估算 6b Mar 5 – Apr 5 Sep 22 – Nov 12 Mar 5–10
Baton Rouge, LA 9a Jan 9 – Feb 9 Oct 27 – Dec 17 Jan 9, Feb 2–6
Lafayette, LA 估算 9a Jan 5 – Feb 5 Nov 1 – Dec 22 Jan 5–9, Feb 2
Shreveport, LA 8b Jan 12 – Feb 12 Oct 25 – Dec 15 Feb 2–7
Bangor, ME 估算 5a Mar 21 – Apr 21 Sep 4 – Oct 25 Apr 2–7
Caribou, ME 4b Mar 21 – Apr 21 Sep 1 – Oct 22 Apr 2–7
Lewiston, ME 估算 5b Mar 18 – Apr 18 Sep 8 – Oct 29 Apr 2–7
Portland, ME 6a Mar 10 – Apr 10 Sep 15 – Nov 5 Mar 10, Apr 2–6
Baltimore, MD 估算 7b Feb 21 – Mar 24 Oct 4 – Nov 24 Mar 4–9
Columbia, MD 估算 7b Feb 21 – Mar 24 Oct 4 – Nov 24 Mar 4–9
Germantown, MD 估算 7b Feb 23 – Mar 26 Sep 30 – Nov 20 Mar 4–9
Boston, MA 7a Feb 16 – Mar 19 Oct 10 – Nov 30 Mar 4–9
Brockton, MA 估算 6b Mar 8 – Apr 8 Sep 17 – Nov 7 Mar 8–10, Apr 2–4
Cambridge, MA 估算 6b Mar 8 – Apr 8 Sep 17 – Nov 7 Mar 8–10, Apr 2–4
Dorchester, MA 估算 6b Mar 8 – Apr 8 Sep 17 – Nov 7 Mar 8–10, Apr 2–4
Fall River, MA 估算 7a Mar 2 – Apr 2 Sep 24 – Nov 14 Mar 4–9
Lowell, MA 估算 6a Mar 12 – Apr 12 Sep 13 – Nov 3 Apr 2–7
Lynn, MA 估算 7a Mar 3 – Apr 3 Sep 24 – Nov 14 Mar 4–9
New Bedford, MA 估算 7a Mar 5 – Apr 5 Sep 23 – Nov 13 Mar 5–10
Newton, MA 估算 6b Mar 8 – Apr 8 Sep 17 – Nov 7 Mar 8–10, Apr 2–4
Quincy, MA 估算 6b Mar 8 – Apr 8 Sep 17 – Nov 7 Mar 8–10, Apr 2–4
South Boston, MA 估算 6b Mar 8 – Apr 8 Sep 17 – Nov 7 Mar 8–10, Apr 2–4
Springfield, MA 估算 6a Mar 19 – Apr 19 Sep 9 – Oct 30 Apr 2–7
Worcester, MA 估算 6b Mar 13 – Apr 13 Sep 12 – Nov 2 Apr 2–7
Ann Arbor, MI 估算 6a Mar 16 – Apr 16 Sep 12 – Nov 2 Apr 2–7
Canton, MI 估算 6b Mar 10 – Apr 10 Sep 21 – Nov 11 Mar 10, Apr 2–6
Clinton Township, MI 估算 6a Mar 15 – Apr 15 Sep 20 – Nov 10 Apr 2–7
Dearborn, MI 估算 6b Mar 10 – Apr 10 Sep 21 – Nov 11 Mar 10, Apr 2–6
Detroit, MI 估算 6b Mar 10 – Apr 10 Sep 21 – Nov 11 Mar 10, Apr 2–6
Detroit City, MI 6b Mar 5 – Apr 5 Oct 1 – Nov 21 Mar 5–10
Flint, MI 估算 6a Mar 18 – Apr 18 Sep 12 – Nov 2 Apr 2–7
Grand Rapids, MI 估算 6a Mar 18 – Apr 18 Sep 14 – Nov 4 Apr 2–7
Lansing, MI 估算 6a Mar 15 – Apr 15 Sep 15 – Nov 5 Apr 2–7
Livonia, MI 估算 6b Mar 10 – Apr 10 Sep 21 – Nov 11 Mar 10, Apr 2–6
Marquette, MI 6a Mar 22 – Apr 22 Sep 21 – Nov 11 Apr 2–7
Sterling Heights, MI 估算 6a Mar 16 – Apr 16 Sep 16 – Nov 6 Apr 2–7
Troy, MI 估算 6a Mar 16 – Apr 16 Sep 16 – Nov 6 Apr 2–7
Warren, MI 估算 6b Mar 10 – Apr 10 Sep 21 – Nov 11 Mar 10, Apr 2–6
Bloomington, MN 估算 5a Mar 11 – Apr 11 Sep 12 – Nov 2 Apr 2–7
Duluth, MN 5a Mar 28 – Apr 28 Sep 12 – Nov 2 Apr 2–7
Minneapolis, MN 估算 5a Mar 11 – Apr 11 Sep 12 – Nov 2 Apr 2–7
Minneapolis-St. Paul, MN 5a Mar 7 – Apr 7 Sep 18 – Nov 8 Mar 7–10, Apr 2–3
Rochester, MN 估算 4b Mar 16 – Apr 16 Sep 7 – Oct 28 Apr 2–7
Saint Paul, MN 估算 5a Mar 11 – Apr 11 Sep 12 – Nov 2 Apr 2–7
Gulfport, MS 估算 9a Jan 2 – Feb 2 Nov 6 – Dec 27 Jan 4–9
Jackson, MS 8b Jan 26 – Feb 26 Oct 15 – Dec 5 Feb 2–7
West Gulfport, MS 估算 9a Jan 2 – Feb 2 Nov 6 – Dec 27 Jan 4–9
Columbia, MO 估算 6b Feb 21 – Mar 24 Sep 27 – Nov 17 Mar 4–9
East Independence, MO 估算 6a Feb 27 – Mar 30 Sep 22 – Nov 12 Mar 4–9
Independence, MO 估算 6a Feb 27 – Mar 30 Sep 22 – Nov 12 Mar 4–9
Kansas City, MO 6b Feb 25 – Mar 28 Sep 24 – Nov 14 Mar 4–9
Lee's Summit, MO 估算 6b Feb 23 – Mar 26 Sep 26 – Nov 16 Mar 4–9
O'Fallon, MO 估算 6b Feb 22 – Mar 25 Sep 26 – Nov 16 Mar 4–9
Springfield, MO 估算 6b Feb 25 – Mar 28 Sep 23 – Nov 13 Mar 4–9
St. Louis, MO 估算 7a Feb 17 – Mar 20 Sep 30 – Nov 20 Mar 4–9
Billings, MT 5b Mar 18 – Apr 18 Sep 7 – Oct 28 Apr 2–7
Bozeman, MT 5a Apr 6 – May 7 Aug 24 – Oct 14 Apr 6–8, May 2–4
Butte, MT 估算 4b Apr 19 – May 20 Aug 12 – Oct 2 May 2–7
Great Falls, MT 估算 4b Mar 31 – May 1 Aug 25 – Oct 15 Apr 2–7
Missoula, MT 5b Mar 30 – Apr 30 Aug 27 – Oct 17 Apr 2–7
Bellevue, NE 估算 5b Mar 4 – Apr 4 Sep 17 – Nov 7 Mar 4–9
Lincoln, NE 估算 6a Mar 7 – Apr 7 Sep 14 – Nov 4 Mar 7–10, Apr 2–3
North Platte, NE 5b Mar 25 – Apr 25 Sep 1 – Oct 22 Apr 2–7
Omaha, NE 5b Mar 2 – Apr 2 Sep 21 – Nov 11 Mar 4–9
Scottsbluff, NE 5a Mar 19 – Apr 19 Sep 4 – Oct 25 Apr 2–7
Elko, NV 5b Apr 12 – May 13 Aug 19 – Oct 9 May 2–7
Enterprise, NV 估算 9a Jan 6 – Feb 6 Oct 26 – Dec 16 Jan 6–9, Feb 2–3
Henderson, NV 估算 9b Dec 16 – Jan 16 Nov 9 – Dec 30 Jan 4–9
Las Vegas, NV 9b Dec 8 – Jan 8 Nov 10 – Dec 31 Dec 8–10, Jan 4–6
North Las Vegas, NV 估算 9a Jan 6 – Feb 6 Oct 26 – Dec 16 Jan 6–9, Feb 2–3
Paradise, NV 估算 9a Jan 6 – Feb 6 Oct 26 – Dec 16 Jan 6–9, Feb 2–3
Reno, NV 7b Mar 4 – Apr 4 Sep 23 – Nov 13 Mar 4–9
Sparks, NV 估算 7a Mar 19 – Apr 19 Sep 15 – Nov 5 Apr 2–7
Spring Valley, NV 估算 9a Jan 6 – Feb 6 Oct 26 – Dec 16 Jan 6–9, Feb 2–3
Sunrise Manor, NV 估算 9a Jan 6 – Feb 6 Oct 26 – Dec 16 Jan 6–9, Feb 2–3
Concord, NH 5b Mar 22 – Apr 22 Sep 3 – Oct 24 Apr 2–7
Manchester, NH 估算 6a Mar 12 – Apr 12 Sep 13 – Nov 3 Apr 2–7
Nashua, NH 估算 6a Mar 12 – Apr 12 Sep 13 – Nov 3 Apr 2–7
Atlantic City, NJ 7a Mar 2 – Apr 2 Sep 29 – Nov 19 Mar 4–9
Clifton, NJ 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Edison, NJ 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Elizabeth, NJ 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Jersey City, NJ 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Newark, NJ 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Paterson, NJ 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Toms River, NJ 估算 7b Feb 27 – Mar 30 Sep 30 – Nov 20 Mar 4–9
Trenton, NJ 估算 7a Feb 28 – Mar 31 Sep 27 – Nov 17 Mar 4–9
Albuquerque, NM 8a Feb 18 – Mar 21 Oct 4 – Nov 24 Mar 4–9
Enchanted Hills, NM 估算 7b Mar 4 – Apr 4 Sep 22 – Nov 12 Mar 4–9
Las Cruces, NM 估算 8b Feb 1 – Mar 4 Oct 13 – Dec 3 Feb 2–7
Rio Rancho, NM 估算 7b Mar 4 – Apr 4 Sep 22 – Nov 12 Mar 4–9
Roswell, NM 7b Feb 25 – Mar 28 Sep 30 – Nov 20 Mar 4–9
Santa Fe, NM 7a Mar 18 – Apr 18 Sep 15 – Nov 5 Apr 2–7
Albany, NY 6a Mar 11 – Apr 11 Sep 15 – Nov 5 Apr 2–7
Amherst, NY 估算 6a Mar 17 – Apr 17 Sep 17 – Nov 7 Apr 2–7
Borough Park, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Buffalo, NY 估算 6a Mar 17 – Apr 17 Sep 17 – Nov 7 Apr 2–7
Bushwick, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Canarsie, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Chinatown, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Corona, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
East Flatbush, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
East Harlem, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
East New York, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Elmhurst, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Flatbush, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Fordham, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Gravesend, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Greenburgh, NY 估算 7a Mar 5 – Apr 5 Sep 23 – Nov 13 Mar 5–10
Jamaica, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
New York City, NY 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Richmond Hill, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Rochester, NY 估算 6b Mar 11 – Apr 11 Sep 22 – Nov 12 Apr 2–7
Sheepshead Bay, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Sunset Park, NY 估算 7a Feb 23 – Mar 26 Oct 2 – Nov 22 Mar 4–9
Syracuse, NY 6a Mar 13 – Apr 13 Sep 19 – Nov 9 Apr 2–7
Upper West Side, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
West Albany, NY 估算 6a Mar 14 – Apr 14 Sep 13 – Nov 3 Apr 2–7
Yonkers, NY 估算 7b Feb 14 – Mar 17 Oct 14 – Dec 4 Mar 4–9
Asheville, NC 7b Feb 21 – Mar 24 Sep 28 – Nov 18 Mar 4–9
Cary, NC 估算 8a Feb 13 – Mar 16 Oct 6 – Nov 26 Mar 4–9
Charlotte, NC 估算 8a Feb 11 – Mar 14 Oct 5 – Nov 25 Mar 4–9
Concord, NC 估算 8a Feb 11 – Mar 14 Oct 5 – Nov 25 Mar 4–9
Durham, NC 估算 8a Feb 13 – Mar 16 Oct 6 – Nov 26 Mar 4–9
Fayetteville, NC 估算 8a Feb 10 – Mar 13 Oct 8 – Nov 28 Mar 4–9
Greensboro, NC 估算 8a Feb 14 – Mar 17 Oct 5 – Nov 25 Mar 4–9
Greenville, NC 估算 8a Feb 7 – Mar 10 Oct 11 – Dec 1 Feb 7–8, Mar 4–7
High Point, NC 估算 8a Feb 17 – Mar 20 Oct 1 – Nov 21 Mar 4–9
Raleigh, NC 估算 8a Feb 13 – Mar 16 Oct 6 – Nov 26 Mar 4–9
Roanoke Rapids, NC 8a Feb 8 – Mar 11 Oct 13 – Dec 3 Feb 8, Mar 4–8
West Raleigh, NC 估算 8a Feb 13 – Mar 16 Oct 6 – Nov 26 Mar 4–9
Wilmington, NC 估算 8b Feb 5 – Mar 8 Oct 15 – Dec 5 Feb 5–8, Mar 4–5
Winston-Salem, NC 估算 7b Feb 21 – Mar 24 Sep 30 – Nov 20 Mar 4–9
Bismarck, ND 4b Mar 24 – Apr 24 Aug 31 – Oct 21 Apr 2–7
Fargo, ND 4a Mar 24 – Apr 24 Aug 31 – Oct 21 Apr 2–7
Grand Forks, ND 估算 4a Mar 25 – Apr 25 Aug 30 – Oct 20 Apr 2–7
Minot, ND 估算 4a Mar 27 – Apr 27 Aug 29 – Oct 19 Apr 2–7
Williston, ND 4a Apr 4 – May 5 Aug 22 – Oct 12 Apr 4–8, May 2
Akron, OH 估算 6b Mar 8 – Apr 8 Sep 26 – Nov 16 Mar 8–10, Apr 2–4
Cincinnati, OH 估算 6b Mar 4 – Apr 4 Sep 23 – Nov 13 Mar 4–9
Cleveland, OH 估算 6b Mar 8 – Apr 8 Sep 26 – Nov 16 Mar 8–10, Apr 2–4
Columbus, OH 估算 6b Mar 8 – Apr 8 Sep 20 – Nov 10 Mar 8–10, Apr 2–4
Dayton, OH 6a Feb 28 – Mar 31 Sep 28 – Nov 18 Mar 4–9
Toledo, OH 6b Mar 6 – Apr 6 Sep 24 – Nov 14 Mar 6–10, Apr 2
Broken Arrow, OK 估算 7b Feb 14 – Mar 17 Oct 3 – Nov 23 Mar 4–9
Cheyenne, OK 7b Feb 15 – Mar 18 Oct 4 – Nov 24 Mar 4–9
Edmond, OK 估算 7b Feb 16 – Mar 19 Oct 3 – Nov 23 Mar 4–9
Lawton, OK 估算 7b Feb 12 – Mar 15 Oct 5 – Nov 25 Mar 4–9
Norman, OK 估算 7b Feb 13 – Mar 16 Oct 5 – Nov 25 Mar 4–9
Oklahoma City, OK 7b Feb 14 – Mar 17 Oct 5 – Nov 25 Mar 4–9
Tulsa, OK 估算 7b Feb 14 – Mar 17 Oct 3 – Nov 23 Mar 4–9
Beaverton, OR 估算 8b Feb 1 – Mar 4 Oct 16 – Dec 6 Feb 2–7
Bend, OR 估算 6b Apr 15 – May 16 Aug 22 – Oct 12 May 2–7
Burns, OR 5b Apr 25 – May 26 Aug 7 – Sep 27 May 2–7
Eugene, OR 8b Feb 23 – Mar 26 Sep 23 – Nov 13 Mar 4–9
Gresham, OR 估算 8b Feb 19 – Mar 22 Oct 7 – Nov 27 Mar 4–9
Hillsboro, OR 估算 8b Feb 17 – Mar 20 Oct 5 – Nov 25 Mar 4–9
Medford, OR 8b Feb 20 – Mar 23 Sep 29 – Nov 19 Mar 4–9
Portland, OR 9a Jan 25 – Feb 25 Oct 20 – Dec 10 Feb 2–7
Salem, OR 估算 8b Feb 27 – Mar 30 Oct 2 – Nov 22 Mar 4–9
Allentown, PA 估算 6b Mar 9 – Apr 9 Sep 19 – Nov 9 Mar 9–10, Apr 2–5
Erie, PA 7a Mar 10 – Apr 10 Oct 5 – Nov 25 Mar 10, Apr 2–6
Philadelphia, PA 7b Feb 14 – Mar 17 Oct 11 – Dec 1 Mar 4–9
Pittsburgh, PA 7a Mar 2 – Apr 2 Sep 28 – Nov 18 Mar 4–9
Reading, PA 估算 7a Mar 2 – Apr 2 Sep 25 – Nov 15 Mar 4–9
Providence, RI 估算 7a Mar 2 – Apr 2 Sep 24 – Nov 14 Mar 4–9
Warwick, RI 估算 7a Mar 2 – Apr 2 Sep 24 – Nov 14 Mar 4–9
Charleston, SC 9a Jan 19 – Feb 19 Oct 28 – Dec 18 Feb 2–7
Columbia, SC 估算 8a Feb 10 – Mar 13 Oct 8 – Nov 28 Mar 4–9
North Charleston, SC 估算 9a Jan 13 – Feb 13 Nov 5 – Dec 26 Feb 2–7
Aberdeen, SD 估算 4a Mar 21 – Apr 21 Aug 31 – Oct 21 Apr 2–7
Brookings, SD 估算 4b Mar 19 – Apr 19 Sep 2 – Oct 23 Apr 2–7
Rapid City, SD 5a Mar 26 – Apr 26 Sep 1 – Oct 22 Apr 2–7
Sioux Falls, SD 5a Mar 10 – Apr 10 Sep 13 – Nov 3 Mar 10, Apr 2–6
Brownsville, TN 8a Feb 10 – Mar 13 Oct 6 – Nov 26 Mar 4–9
Chattanooga, TN 8a Feb 5 – Mar 8 Oct 10 – Nov 30 Feb 5–8, Mar 4–5
Clarksville, TN 估算 7a Feb 19 – Mar 22 Sep 29 – Nov 19 Mar 4–9
East Chattanooga, TN 估算 7b Feb 14 – Mar 17 Oct 3 – Nov 23 Mar 4–9
Franklin, TN 7b Feb 15 – Mar 18 Oct 1 – Nov 21 Mar 4–9
Knoxville, TN 7b Feb 13 – Mar 16 Oct 3 – Nov 23 Mar 4–9
Memphis, TN 8a Jan 28 – Feb 28 Oct 17 – Dec 7 Feb 2–7
Murfreesboro, TN 估算 7b Feb 23 – Mar 26 Sep 25 – Nov 15 Mar 4–9
Nashville, TN 7b Feb 12 – Mar 15 Oct 4 – Nov 24 Mar 4–9
New South Memphis, TN 估算 8a Feb 2 – Mar 5 Oct 10 – Nov 30 Feb 2–7
Smyrna, TN 7b Feb 25 – Mar 28 Sep 21 – Nov 11 Mar 4–9
Abilene, TX 估算 8a Feb 9 – Mar 12 Oct 8 – Nov 28 Mar 4–9
Alief, TX 估算 9b Dec 28 – Jan 28 Nov 10 – Dec 31 Jan 4–9
Allen, TX 估算 8b Jan 28 – Feb 28 Oct 17 – Dec 7 Feb 2–7
Amarillo, TX 7a Feb 27 – Mar 30 Sep 29 – Nov 19 Mar 4–9
Arlington, TX 估算 8b Jan 23 – Feb 23 Oct 20 – Dec 10 Feb 2–7
Austin, TX 9a Jan 24 – Feb 24 Oct 17 – Dec 7 Feb 2–7
Beaumont, TX 估算 9a Jan 8 – Feb 8 Oct 30 – Dec 20 Jan 8–9, Feb 2–5
Carrollton, TX 估算 8b Jan 22 – Feb 22 Oct 21 – Dec 11 Feb 2–7
College Station, TX 估算 9a Jan 17 – Feb 17 Oct 24 – Dec 14 Feb 2–7
Corpus Christi, TX 10a Nov 29 – Dec 30 Nov 30 – Jan 20 Dec 5–10
Cypress, TX 估算 9b Dec 28 – Jan 28 Nov 10 – Dec 31 Jan 4–9
Dallas, TX 估算 8b Jan 22 – Feb 22 Oct 21 – Dec 11 Feb 2–7
Denton, TX 估算 8a Feb 1 – Mar 4 Oct 14 – Dec 4 Feb 2–7
El Paso, TX 8b Jan 14 – Feb 14 Oct 21 – Dec 11 Feb 2–7
Fort Worth, TX 估算 8b Jan 23 – Feb 23 Oct 20 – Dec 10 Feb 2–7
Frisco, TX 估算 8b Jan 28 – Feb 28 Oct 17 – Dec 7 Feb 2–7
Garland, TX 估算 8b Jan 22 – Feb 22 Oct 21 – Dec 11 Feb 2–7
Grand Prairie, TX 估算 8b Jan 22 – Feb 22 Oct 21 – Dec 11 Feb 2–7
Houston, TX 9b Dec 28 – Jan 28 Nov 9 – Dec 30 Jan 4–9
Irving, TX 估算 8b Jan 22 – Feb 22 Oct 21 – Dec 11 Feb 2–7
Killeen, TX 估算 8b Jan 25 – Feb 25 Oct 18 – Dec 8 Feb 2–7
Laredo, TX 估算 9b Dec 19 – Jan 19 Nov 14 – Jan 4 Jan 4–9
League City, TX 估算 9b Dec 21 – Jan 21 Nov 17 – Jan 7 Jan 4–9
Lewisville, TX 估算 8b Jan 28 – Feb 28 Oct 17 – Dec 7 Feb 2–7
Lubbock, TX 7b Feb 5 – Mar 8 Oct 12 – Dec 2 Feb 5–8, Mar 4–5
McKinney, TX 估算 8b Jan 28 – Feb 28 Oct 17 – Dec 7 Feb 2–7
Mesquite, TX 估算 8b Jan 22 – Feb 22 Oct 21 – Dec 11 Feb 2–7
Midland, TX 8a Feb 7 – Mar 10 Oct 10 – Nov 30 Feb 7–8, Mar 4–7
Odessa, TX 估算 8a Jan 30 – Mar 2 Oct 14 – Dec 4 Feb 2–7
Paducah, TX 8a Feb 17 – Mar 20 Oct 4 – Nov 24 Mar 4–9
Pasadena, TX 估算 9b Dec 21 – Jan 21 Nov 17 – Jan 7 Jan 4–9
Pearland, TX 估算 9b Dec 21 – Jan 21 Nov 17 – Jan 7 Jan 4–9
Plano, TX 估算 8b Jan 28 – Feb 28 Oct 17 – Dec 7 Feb 2–7
Richardson, TX 估算 8b Jan 22 – Feb 22 Oct 21 – Dec 11 Feb 2–7
Round Rock, TX 估算 8b Jan 21 – Feb 21 Oct 22 – Dec 12 Feb 2–7
San Angelo, TX 估算 8a Feb 8 – Mar 11 Oct 8 – Nov 28 Feb 8, Mar 4–8
San Antonio, TX 9a Jan 10 – Feb 10 Oct 29 – Dec 19 Feb 2–7
Sugar Land, TX 估算 9b Dec 28 – Jan 28 Nov 10 – Dec 31 Jan 4–9
The Woodlands, TX 估算 9a Jan 9 – Feb 9 Oct 31 – Dec 21 Jan 9, Feb 2–6
Tyler, TX 估算 8b Jan 24 – Feb 24 Oct 19 – Dec 9 Feb 2–7
Waco, TX 估算 8b Jan 27 – Feb 27 Oct 16 – Dec 6 Feb 2–7
Wichita Falls, TX 8a Feb 7 – Mar 10 Oct 10 – Nov 30 Feb 7–8, Mar 4–7
Ogden, UT 估算 6a Mar 27 – Apr 27 Sep 4 – Oct 25 Apr 2–7
Orem, UT 估算 7a Mar 14 – Apr 14 Sep 14 – Nov 4 Apr 2–7
Provo, UT 估算 7a Mar 14 – Apr 14 Sep 14 – Nov 4 Apr 2–7
Salt Lake City, UT 7b Feb 20 – Mar 23 Oct 1 – Nov 21 Mar 4–9
Sandy, UT 估算 6b Mar 25 – Apr 25 Sep 8 – Oct 29 Apr 2–7
Sandy Hills, UT 估算 6b Mar 25 – Apr 25 Sep 8 – Oct 29 Apr 2–7
West Jordan, UT 估算 6b Mar 25 – Apr 25 Sep 8 – Oct 29 Apr 2–7
West Valley City, UT 估算 7a Mar 3 – Apr 3 Sep 24 – Nov 14 Mar 4–9
Burlington, VT 5a Mar 13 – Apr 13 Sep 15 – Nov 5 Apr 2–7
Colchester, VT 估算 5a Mar 19 – Apr 19 Sep 10 – Oct 31 Apr 2–7
South Burlington, VT 估算 5a Mar 20 – Apr 20 Sep 9 – Oct 30 Apr 2–7
Alexandria, VA 估算 7b Feb 19 – Mar 22 Oct 3 – Nov 23 Mar 4–9
Arlington, VA 估算 7b Feb 19 – Mar 22 Oct 3 – Nov 23 Mar 4–9
Chesapeake, VA 估算 8a Feb 7 – Mar 10 Oct 16 – Dec 6 Feb 7–8, Mar 4–7
East Hampton, VA 估算 8b Feb 5 – Mar 8 Oct 18 – Dec 8 Feb 5–8, Mar 4–5
Hampton, VA 估算 8b Feb 5 – Mar 8 Oct 18 – Dec 8 Feb 5–8, Mar 4–5
Newport News, VA 估算 8a Feb 7 – Mar 10 Oct 16 – Dec 6 Feb 7–8, Mar 4–7
Norfolk, VA 8b Jan 29 – Mar 1 Oct 24 – Dec 14 Feb 2–7
Portsmouth, VA 估算 8a Feb 7 – Mar 10 Oct 16 – Dec 6 Feb 7–8, Mar 4–7
Portsmouth Heights, VA 估算 8a Feb 7 – Mar 10 Oct 16 – Dec 6 Feb 7–8, Mar 4–7
Richmond, VA 7b Feb 15 – Mar 18 Oct 5 – Nov 25 Mar 4–9
Roanoke, VA 估算 7b Feb 24 – Mar 27 Sep 28 – Nov 18 Mar 4–9
Suffolk, VA 估算 8a Feb 18 – Mar 21 Oct 6 – Nov 26 Mar 4–9
Virginia Beach, VA 估算 8b Jan 30 – Mar 2 Oct 23 – Dec 13 Feb 2–7
Bellevue, WA 估算 9a Feb 1 – Mar 4 Oct 14 – Dec 4 Feb 2–7
Bellingham, WA 估算 8a Feb 17 – Mar 20 Oct 1 – Nov 21 Mar 4–9
Everett, WA 估算 9a Feb 1 – Mar 4 Oct 14 – Dec 4 Feb 2–7
Federal Way, WA 估算 8b Feb 9 – Mar 12 Oct 9 – Nov 29 Mar 4–9
Kent, WA 估算 8b Feb 9 – Mar 12 Oct 9 – Nov 29 Mar 4–9
Kirkland, WA 估算 9a Feb 1 – Mar 4 Oct 14 – Dec 4 Feb 2–7
Olympia, WA 8a Mar 13 – Apr 13 Sep 14 – Nov 4 Apr 2–7
Pasco, WA 7b Mar 11 – Apr 11 Sep 11 – Nov 1 Apr 2–7
Renton, WA 估算 8b Feb 9 – Mar 12 Oct 9 – Nov 29 Mar 4–9
Seattle, WA 9a Jan 14 – Feb 14 Oct 24 – Dec 14 Feb 2–7
Spokane, WA 6b Mar 10 – Apr 10 Sep 12 – Nov 2 Mar 10, Apr 2–6
Spokane Valley, WA 估算 6b Mar 21 – Apr 21 Sep 1 – Oct 22 Apr 2–7
Tacoma, WA 估算 8b Feb 9 – Mar 12 Oct 9 – Nov 29 Mar 4–9
Tri-Cities, WA 估算 7b Feb 26 – Mar 29 Sep 21 – Nov 11 Mar 4–9
Vancouver, WA 估算 8b Feb 17 – Mar 20 Oct 5 – Nov 25 Mar 4–9
Yakima, WA 7a Mar 22 – Apr 22 Sep 4 – Oct 25 Apr 2–7
Beckley, WV 6b Mar 6 – Apr 6 Sep 21 – Nov 11 Mar 6–10, Apr 2
Charleston, WV 7a Feb 28 – Mar 31 Sep 26 – Nov 16 Mar 4–9
Huntington, WV 估算 7a Feb 28 – Mar 31 Sep 27 – Nov 17 Mar 4–9
Parkersburg, WV 估算 6b Mar 8 – Apr 8 Sep 22 – Nov 12 Mar 8–10, Apr 2–4
Green Bay, WI 5b Mar 21 – Apr 21 Sep 9 – Oct 30 Apr 2–7
Kenosha, WI 估算 6a Mar 9 – Apr 9 Sep 21 – Nov 11 Mar 9–10, Apr 2–5
Madison, WI 估算 5a Mar 15 – Apr 15 Sep 10 – Oct 31 Apr 2–7
Milwaukee, WI 估算 6a Mar 11 – Apr 11 Sep 20 – Nov 10 Apr 2–7
Casper, WY 5a Apr 9 – May 10 Aug 23 – Oct 13 May 2–7
Cheyenne, WY 估算 5b Mar 31 – May 1 Aug 28 – Oct 18 Apr 2–7
Gillette, WY 估算 5a Apr 3 – May 4 Aug 27 – Oct 17 Apr 3–8
一句话总结：终霜日期是 50% 的概率——有一半的年份会在这之后还结霜。 Garlic 属于 hardy，所以 轻微的晚霜还扛得住，但在又冷又湿的土里别硬来。

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这些数据到底有多准？

Extension recommendations for the same crop routinely disagree by two to four weeks, and occasionally more, so these offsets should be presented as windows and starting points rather than deadlines. Three things drive the spread. (1) Regional risk tolerance: for warm-season crops, Colorado State and Utah State put tomatoes, peppers and melons out about 14 days after the last frost, while University of Missouri's calendar works out to roughly 25-35 days after the last frost and University of Maryland's window runs from the frost date itself out to 45 days past it. That is a real 6-week spread for the single most popular garden crop, and it exists because a short-season mountain state is optimizing against a short season while a humid continental state is optimizing against cold, wet spring soil. (2) Soil temperature versus calendar date: most Extension services now say the honest trigger is soil temperature at 4 inches, not the frost date, and the frost-relative number is a convenience translation. A cold, wet spring can push the real date two or three weeks past the calendar recommendation. (3) Days-to-maturity is variety-specific and is measured differently for direct-seeded versus transplanted crops - seed catalogs count from transplant date for tomatoes, peppers, eggplant and cole crops, but from sowing for roots and greens - so a 'days to maturity' range of 60-85 for tomato is genuinely 60-85 depending on which packet you bought. Additionally, the average last frost is a 50% probability, meaning half of all years have a frost after that date; Extension services commonly advise waiting 1-2 weeks past it for anything frost-tender, or being prepared to cover. Treat every number here as plus or minus about 10-14 days.

其他作物

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