You can freeze asparagus.
How to Prepare Asparagus for Freezing
The quality of freshly picked asparagus degrades quickly, so it should be prepared for freezing the same day that it is harvested.
Wash freshly picked stalks in cold water to remove all debris.
Trim off the woody part of the stalk.
Blanch before You Freeze
Blanching is a necessary step in the process of freezing vegetables. Blanching helps to lock in flavor and helps to maintain color and texture by slowing the action of enzymes. It also helps to slow vitamin loss.
Heat one gallon of water per pound of asparagus in a pot fitted with a blanching basket.
Bring to a boil.
Add asparagus to the pot.
Blanch for several minutes depending on the size of the spears. Blanch small spears under 5” for two minutes, medium spears (7”) for three, and large spears for four minutes. Start timing after the water returns to a boil.
Immerse in cold water immediately to stop the cooking process.
Package immediately and freeze.
Packaging Asparagus for the Freezer
You can store your asparagus in any freezer safe container as long as it is moisture proof and will not allow freezer odors to penetrate. Acceptable containers include plastic freezer bags, aluminum foil, and freezer paper. If using a freezer bag, press to release all the air prior to sealing.
“Freezing.” National Center for Home Food Preservation. N.p., n.d. Web. 25 Feb. 2014. <http://nchfp.uga.edu/how/freeze/asparagus.html>.
“Frequently Asked Freezing Questions.” National Center for Home Food Preservation. N.p., n.d. Web. 25 Feb. 2014. <http://nchfp.uga.edu/questions/FAQ_freezing.html>.