How to Grow Sugar Beets USA

At a Glance

Quick Facts

Factor	Value
Soil texture	sandy loam, nutrient-rich, humus-laden, deeply ploughed (Wikipedia)
Drainage	well-drained
Lifecycle	biennial
Edible parts	root, leaves

Soil & Growing Conditions

Water: moisture-retentive, kept moist until germination (Wikipedia, Strictly Medicinal Seeds)

Growth Stages

Stage	BBCH	Notes
Sowing	0	Direct seed in a shallow furrow in spring, barely covered, tamped and kept moist until rapid germination (Strictly Medicinal Seeds).
Thinning	1	Thin seedlings to about 6in apart (Strictly Medicinal Seeds).
Root development	4	Root swells over about 90-100 days, accumulating sugar content of 12-21% depending on cultivar and conditions (Wikipedia).
Frost-triggered harvest	8	Fall harvest begins with the first hard frost, which arrests photosynthesis and further root growth (Wikipedia).

Harvest & Storage

When to pick: Fall harvest begins with the first hard frost, which arrests photosynthesis and further root growth; average root weight 0.5-1kg, matures in about 90 days (Wikipedia).

Diseases

Beet leaf curl virus

moderate

Wikipedia names this directly.

Rhizomania ("root madness")

high

Wikipedia names this directly: susceptible to rhizomania ("root madness").

Beet yellows virus

moderate

Wikipedia names this directly.

Pests

Aphids

moderate

Aphididae (various spp.)

Likely rather than confirmed: no source names this crop directly, but it shares a species (Beta vulgaris) with Beetroot, which lists this pest.

Beet leaf miner

moderate

Pegomya hyoscyami

Likely rather than confirmed: no source names this crop directly, but it shares a species (Beta vulgaris) with Beetroot, which lists this pest.

What the research guides add

Sugar beet is a field crop, and the NDSU guide for the main US growing region is about timing and plant stand rather than garden technique.

• Sugar beet should be planted as early as weather, soil moisture and temperature conditions permit; the potential for very high yields from early plantings is usually considered worth the risk of frost damage. (NDSU Extension)
• Plant the seed 1 to 1.25 inches deep for maximum germination and emergence. (NDSU Extension)
• NDSU recommends a row width of 22 inches in Minnesota and North Dakota, and says higher, more uniform plant populations are easier to establish on narrow rows. (NDSU Extension)
• A good plant population at harvest is about 175 to 200 uniformly spaced plants per 100 feet of row. (NDSU Extension)

Sugar beet in the USA: climate data

Dates are the median 32°F freeze dates and freeze-free days from NOAA NCEI U.S. Climate Normals 1991–2020; zones come from the USDA 2023 Plant Hardiness Zone Map (ZIP code of each city centre).

Sources for this section

• North Dakota State University Extension: 2026 Sugarbeet Production Guide (A1698-26)

Section researched and checked on 25 October 2026 by the SoilCommander Editorial Team. How we check facts: editorial policy.

Sources

The full list of 3 sources behind this guide (Farmers Weekly, Strictly Medicinal Seeds, Wikipedia) is in the references of our UK guide to sugar beets; they describe the plant itself, which is the same wherever it grows.