$1.04 per lb
Total (50 lbs): $52.00

Alta Seeds AS6503 Sorghum Sudan has wide window of harvest and consistent quality over the entire growing season. Buy yours here!

Out of stock

Weight: 50 lbs Seed Rate: 40 to 50 lbs/acre Stock Status: Out of stock Zones: 1, 2, 3, 4, 5, 6 Brand: SKU: 615-SS12

Product Description


AS6503 is a photoperiod sensitive (PPS) product which provides a wide window of harvest and consistent quality over the entire growing season – plus the increased utilization and efficiency you gain from the BMR 6 gene. AS6503 is unique in that it can produce high sugar (Brix) readings in the vegetative state. These characteristics coupled with an excellent disease package make AS6503 a great choice for silage, dry hay or grazing. AS6503 will remain in the vegetative state when the plant receives a minimum of 12 hours and 20 minutes of daily sunlight allowing for the greatest harvest flexibility. Once day length falls below this threshold, it goes to a reproductive state.

  • Photoperiod sensitive
  • Highly disease resistance
  • Produces high sugars while vegetative
  • Wide harvest window


Soil temperature should be at least 60º F. Avg. Seeds per Pound: 13,000 – 15,000. Planting depth should be 1”. Can be no-tilled into the stubble of winter and spring crops. Do not plant in soils with pH greater 7.5 – 8.0 as Iron Chlorosis can be a severe problem.


A soil test is highly recommended to establish a base line of fertility requirements. Under favorable growing conditions, apply 1 to 1.25 lbs. of nitrogen per day of planned growth. For example, for a planned 60-day harvest, apply 50 to 75 lbs. of nitrogen; for a subsequent planned 30-day cutting, reapply 30 to 37 lbs. of nitrogen. Reduce nitrogen rates for less than optimum growing conditions. Potassium levels should be kept up, particularly if the soil pH is lower than 6.2. If soil pH is above 7.0, a foliar application of iron may be necessary or Iron Chlorosis (yellowing of the leaves) may be a problem. This can be reduced by foliar feeding iron while plants are still young. Avoid large nitrogen applications prior to expected drought periods which can increase Prussic Acid concentration for several weeks after application.


For the best quality and yield under a multi-cut program, harvest at 40 days or 40 inches of growth, which ever comes first. Sorghum species dry slowly because of their drought tolerance. One method of managing drydown in silage is to swath the crop, allow it to wilt to a desired moisture level, and then pick up the wind rows with a silage chopper. Protein will decline as harvest is delayed. Energy will increase upon heading due to continued sugar formation in the sorghum stalks and leaves, and carbohydrate deposition in the developing grain. Careful attention should be paid to the cutting height. For regrowth, 2 nodes or 6-8 inches of stubble is optimal. Sharp blades provide for a clean cut and enhance regrowth.

Do not harvest drought-damaged plants within four days following a good rain. Do not greenchop within seven days of a killing frost. Cut at a higher stubble height, nitrates tend to accumulate in the lower stalk. Wait one month before feeding silage to give Prussic Acid enough time to escape.

AS6503 Tech Sheet

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Additional information

Weight 50 lbs


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