Generally speaking, corn is slightly more tolerant of Accent than Beacon. A newer postemergence herbicide that has good activity on seedling johnsongrass is Basis Gold. However, Basis Gold is not as effective as either Accent or Beacon on rhizome johnsongrass. Producers interested in establishing spring seedings of alfalfa should be strongly discouraged . The recommended time to plant alfalfa in Texas is from August 20-October 1.
More water is required for production.
Weed and insect problems tend to be more severe with spring-seeded alfalfa. If irrigation is available, the weather is agreeable, and the planets are properly aligned, nothing is impossible. However, I would be more inclined to bet my money on a fall seeding than on a spring seeding any day of the week.