How do I control perennial grasses in my asparagus bed?

Question:

How do I control perennial grasses in my asparagus bed?

Answer:

Because of their extensive root systems, perennial grasses can be difficult to control in asparagus. Hoeing or tilling will simply not work. The best option is to spot treat with a non-selective herbicide immediately after the last harvest of the season. During the last harvest, cut or snap off all asparagus spears at the soil surface. Then immediately spot treat the grass-infested areas with the herbicide. Do not allow herbicide to get on any emerged asparagus growth as injury or death may result.