Regional guide
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.
Climate signals
- USU's peer-reviewed fact sheet, revised May 2025, groups Utah vegetables into four major categories, A-D, by cold tolerance for spring planting dates.
- Utah planting dates vary sharply by place: St George lists a March 30 average last spring frost, while Woodruff lists June 26.
- USU notes that frost can vary over a short distance because of elevation and topography, so gardeners should keep records for their own sites.
- Several Utah locations list Group D very tender crops with a protected with cover flag, so warm-crop timing needs local protection checks.
Planning notes
- Use Group A hardy crops as soon as the soil dries out in spring; source examples include peas, radish, spinach, turnip, broccoli, cabbage, Brussels sprouts, and artichoke.
- Use Group B semi-hardy crops about 2 weeks before average last spring frost; source examples include beets, lettuce, carrots, parsnips, Swiss chard, endive, and cauliflower.
- Use Group C tender crops on the average date of the last spring frost; source examples include cucumber, sweet corn, snap bean, summer squash, and celery.
- Use Group D very tender crops about 2 weeks after Group C when soil is warm; source examples include winter squash, eggplant, pepper, pumpkin, tomato, and watermelon.
- For broccoli, radish, carrot, sweet corn, and Swiss chard, plan several plantings where the season is long enough.
- Fall Group E examples include beets July 1 - August 1, spinach July 1 - August 15, and turnip July 1 - August 1.
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.
- Green Globe Artichoke Vegetable · Warm · 120 days
- Provider Bush Bean Vegetable · Warm · 50 days
- Detroit Dark Red Beet Vegetable · Cool · 58 days
- Waltham 29 Broccoli Vegetable · Cool · 74 days
- Long Island Improved Brussels Sprouts Vegetable · Cool · 100 days
- Golden Acre Cabbage Vegetable · Cool · 64 days
- Danvers 126 Carrot Vegetable · Shoulder · 70 days
- Snowball Y Cauliflower Vegetable · Cool · 70 days
- Tall Utah Celery Vegetable · Cool · 110 days
- Bright Lights Swiss Chard Vegetable · Shoulder · 55 days
- Golden Bantam Sweet Corn Vegetable · Warm · 80 days
- Marketmore 76 Cucumber Vegetable · Warm · 58 days
- Black Beauty Eggplant Vegetable · Warm · 80 days
- Green Curled Endive Vegetable · Cool · 85 days
- Lacinato Kale Vegetable · Cool · 60 days
- Early White Vienna Kohlrabi Vegetable · Cool · 55 days
- Black Seeded Simpson Lettuce Vegetable · Cool · 45 days
- Evergreen Bunching Onion Vegetable · Shoulder · 65 days
- Hollow Crown Parsnip Vegetable · Cool · 120 days
- Sugar Snap Pea Vegetable · Cool · 62 days
- California Wonder Pepper Vegetable · Warm · 72 days
- Small Sugar Pumpkin Vegetable · Warm · 100 days
- French Breakfast Radish Vegetable · Cool · 28 days
- American Purple Top Rutabaga Vegetable · Cool · 90 days
- Bloomsdale Spinach Vegetable · Cool · 42 days
- Waltham Butternut Squash Vegetable · Warm · 95 days
- Roma Tomato Vegetable · Warm · 76 days
- Purple Top White Globe Turnip Vegetable · Cool · 55 days
- Sugar Baby Watermelon Vegetable · Warm · 80 days
Related regional guides
- 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.
- 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.
- Utah Vegetable Variety Recommendations USU archived Utah guide for variety selection, maturity/frost-free caveats, disease-resistance framing, planting chart, and conservative matches.