Regional guide

Washington County Utah Fall Vegetable Calendar

USU Washington County fall guide for August direct-seed windows, September transplants, elevation shifts, frost caveats, and storage onions.

Climate signals

• USU labels this source Fall Vegetable Garden Calendar for Washington County.
• USU says Washington County locations vary widely in elevation, which has significant influence on climate and growing season.
• St. George has an elevation of 2,624 feet and a frost-free growing season of more than six months.
• Enterprise has an elevation of 5,346 feet, and the frost-free season begins the first week of June and ends in mid-September.
• Knowing when to plant is critical where the season is short, about 3 1/2 months.

Planning notes

• August 10-20 direct-seed rows include Beans at 50-60 days and 1 to 1 1/2 inches, Beets at 50-63 days and 3/4 to 1 1/4 inches, and Carrots at 50-70 days and 1/8 inch.
• August 20-30 direct-seed rows include Green onions at 50-60 days and 1/2 to 1 inch, Kale at 50-60 days and 1/4 to 1/2 inch, Kohlrabi at 50-60 days and 1/4 to 1/2 inch, Peas at 55-70 days and 1 to 1 1/2 inches, and Lettuce at 64-68 days and 1/4 to 1/2 inch.
• Overwintering onions are listed in the August 20-30 block at 50+60 days and 1/2 to 1 inch, with a note: do not plant before September 1.
• Additional August 20-30 direct-seed rows include Radishes at 28-30 days, Swiss chard at 44-55 days, Spinach at 42-45 days, and Turnips at 57-60 days.
• For transplants, USU says to wait until temperatures begin to cool noticeably before planting transplants.
• Sept. 10-25 transplant rows include Broccoli at 45-60 days, Cabbage at 45-60 days, Cauliflower at 45-60 days, and Lettuce at 30-45 days from transplanting to maturity.
• At higher elevations above 4,000 feet, move planting dates up by about 2 weeks.
• Much of Washington County has a long growing season extending well into October, while higher elevations will likely see frost earlier, so plan accordingly.
• On transplanted vegetables such as broccoli and cabbage, plan on needing an additional month after planting to allow them to mature.
• Many fall crops can withstand a light frost, but they should be well established before frost.
• USU says lettuce, spinach, and beets will handle the frost quite well.
• Onions kept for storage do better if planted now and harvested next summer.
• Use the onion catalog link for green onion crop-row context; the storage and overwintering onion notes are timing guidance, not storage-onion cultivar recommendations.
• Use these priority catalog links as crop-row examples, not USU cultivar recommendations.

Catalog crop examples

These catalog entries match crops covered by the regional timing source; variety-specific details remain tied to each seed entry's own source.

• Provider Bush Bean Vegetable · Warm · 50 days
• Detroit Dark Red Beet Vegetable · Cool · 58 days
• Danvers 126 Carrot Vegetable · Shoulder · 70 days
• Evergreen Bunching Onion Vegetable · Shoulder · 65 days
• Lacinato Kale Vegetable · Cool · 60 days
• Early White Vienna Kohlrabi Vegetable · Cool · 55 days
• Sugar Snap Pea Vegetable · Cool · 62 days
• Black Seeded Simpson Lettuce Vegetable · Cool · 45 days
• French Breakfast Radish Vegetable · Cool · 28 days
• Bright Lights Swiss Chard Vegetable · Shoulder · 55 days
• Bloomsdale Spinach Vegetable · Cool · 42 days
• Purple Top White Globe Turnip Vegetable · Cool · 55 days
• Waltham 29 Broccoli Vegetable · Cool · 74 days
• Golden Acre Cabbage Vegetable · Cool · 64 days
• Snowball Y Cauliflower Vegetable · Cool · 70 days

Related regional guides

• Utah Frost-Group Vegetable Garden A USU frost-group guide for Utah planting dates, city frost swings, protected-cover caveats, succession rows, and fall windows.
• Wasatch Front Vegetable Planting Dates USU Wasatch Front guide for city last-frost dates, hardy/tender planting groups, succession rows, and fall harvest windows.
• Washington County Utah Two-Season Vegetable Garden USU Washington County guide for elevation-driven frost seasons, St. George heat pause, short-season sites, and fall count-back timing.
• Utah Vegetable Variety Recommendations USU archived Utah guide for variety selection, maturity/frost-free caveats, disease-resistance framing, planting chart, and conservative matches.

Source: USU Extension Washington County Fall Vegetable Garden Calendar