Planting the asparagus in these raised garden beds uses the same principles...... as if the crowns were planted in a traditional garden plot  ... 12 inch trench 6 to 8 inches deep... spead the roots in the trench An asparagus bed? Planting Asparagus. A raised bed isolates the perennial crop from invasive weeds and grasses that might creep into the growing area. Make sure to till the soil to at least 12 inches. Then, lay the crowns a foot apart, and spread the roots out around them, like you see here. To plant them in a raised bed, just fill the bed with six inches of soil (half way, if your bed is a foot deep).

Our Asparagus Raised Bed Takes Shape As we build an asparagus raised bed we start to feel like we are getting closer to being ready to plant our asparagus crowns when they arrive. Most of today’s asparagus crowns need to be planted six-inches deep. The soil in the raised bed should be turned. You may achieve this with a tiller or a simple garden fork. All have shallow roots that don't compete well with weeds and that can be damaged by aggressive weeding tools. Once you have prepared your raised bed properly you can grow asparagus there for 10 to 20 years without a problem. How to Grow Asparagus in Raised Beds Preparing a Raised Bed. Start with a raised bed. Purchase 1-year-old asparagus crowns. Prepare the raised bed before the last frost of the season ends. Harvesting Asparagus. When the raised bed is properly prepared, the asparagus plants can flourish there for 10 to 20 years of growth. If you read our first instalment you will know that we have very heavy clay soil and are choosing to build a raised bed to plant our asparagus.