Grilling asparagus typically takes between 3 to 10 minutes depending on the thickness of the spears and the grill temperature:

• Thin asparagus spears usually take about 3 to 5 minutes on a high heat grill to become tender and slightly charred

• Thicker asparagus spears require roughly 6 to 10 minutes over medium heat to achieve a crisp-tender texture

• The asparagus should be grilled with the lid closed, turning occasionally to ensure even cooking and grill marks

• You can test doneness by poking with a fork; the asparagus should be tender but not mushy and retain a bright green color

In summary, grill thin asparagus for about 3-5 minutes and thicker spears for 6-10 minutes at medium to high heat, adjusting time based on your preferred tenderness and grill temperature