Growing between 4 ft. – 7 ft. tall, sudangrass has numerous light green leaves between 4 cm. – 22 cm. long and 8 cm. – 15 cm. wide with ¼” stems. Plants do not possess rhizomes and only produce fibrous roots. Sudangrass produces many tillers speeding regrowth if injured.

Not Recommended

Seeds/Lb: 40,000 – 43,000

Growing in a range of soils that span from heavy clay to sandy, sudangrass shines in soils that are well-drained and fertile. While being tolerant of drought, extended periods will cause wilting. Not a friend of the cold, sudangrass will go dormant in the winter if not winterkilled outright.

Soil pH: 5.8 – 7.5

Optimum Growth Range: 60°F+

Sow sudangrass when there is no chance of frost for the area (about three weeks after recommended corn planting for your location). Sudangrass does well when no-tilled into stubble in 6” – 7” row spacing for hay harvest or 18” – 20” in rows for grazing. Stagger planting dates to gain flexibility with maturity stages for grazing or green-chop harvest.

Seeding Depth: ¾” – 2″

Monoculture: 20 – 30 Lb/A

Min Time To Emergence: 10 days

Ideal Temp: 60°F – 85°F

While sudangrass does have the potential to cause prussic acid poisoning, risks can be managed by waiting to graze or cut for green chop until the plant is at least 18” – 20” tall. Avoid allowing animals to graze on sudangrass after a drought or for ten days after a killing frost. Dhurrin, the chemical that causes prussic acid poisoning, is highest in young plants, which may still emerge after a drought or frost.

Earliest Time To Graze: 18″ – 20″

Excessive nitrogen fertilization could lead to an increased likelihood of prussic acid poisoning or nitrate poisoning. Dark green plant growth will be an indicator of the probability of prussic acid poisoning.

At Planting: 110 Lb/A N – 130 Lb/A N

During Grazing Season: 110 Lb/A N – 130 Lb/A N

Sudangrass will make excellent hay due to its slender culms. Prussic acid concerns dwindle when utilizing Sudangrass for hay or silage vs. grazing. Curing processes destroy prussic acid, making hay and silage seldom toxic even in situations where the original forage was. Storing green chop stored in an enclosed area is potentially harmful as heat tends to release prussic acid. Store Sudangrass green chop in an open space or wait several days after removing from storage to avoid potential issues. Smaller stems will give better drying characteristics.

Timing: Soft-Dough Stage

Cuttings During Season: 5

Minimum Graze Height: 6″ – 8″

Rest Period: 3 – 4 weeks

• Pearl Millet

Tons of Dry Matter/A: 3 – 5

Due to the quick emergence and growth, herbicides are not usually needed.

Sudangrass has the potential to release prussic acid. Fertilizer management and wilting before feeding can mitigate risks. Utilize sulfur block supplements and avoid harvesting basal stalks or grazing after a killing frost or extensive drought to mitigate prussic acid dangers. Copper levels can be a concern when grazing sheep. Sudangrass can be injured by applications of 2,4-D.

• Anthracnose
• Ascochyta Leaf Spot
• Bacterial Stripe
• Bacterial Leaf Blight
• Ergot
• Powdery Mildew
• Downy Mildew

• Cutworms
• Grasshoppers
• Chinch Bugs
• Greenbugs