Boiling asparagus typically takes between 1 to 7 minutes depending on the thickness and age of the spears:

• Thin or skinny asparagus spears cook very quickly, about 1 to 2 minutes

• Average-sized asparagus usually takes around 3 to 5 minutes to become tender but still crisp

• Larger or older, tougher asparagus may require 6 to 7 minutes or slightly longer

• For blanching (boiling then shocking in ice water to stop cooking), 3 to 4 minutes is common to keep asparagus tender and vibrant green

To preserve the bright green color and avoid overcooking, it is recommended not to boil asparagus longer than 6 minutes, then rinse with cool water or transfer to an ice bath immediately

. In summary, boil asparagus for about 3 to 5 minutes depending on thickness, and adjust slightly for thinner or thicker spears. Stop cooking promptly by cooling to maintain texture and color.