I am expanding my garden, including adding a good foot depth of soil. I have 2 yr old asparagus ferns. Should I go through trouble of "transplanting" or will they be ok just gently adding new soil around them? They would still be about 8 inches tall above new soil height.
I would not advise trying to lift your Asparagus, the despise being moved, as they have long tap roots.
You can top dress the plants each spring with 2 to 3 inches of composted manure and then add a 2 inch layer of organic mulch.