Artichokes are the stars of the edible landscape!
Of course we all love to dip them in butter, but artichoke plants also have great garden design elements with their dramatic height, spiky foliage, and purple flowers. Protect your artichokes from frost and welcome them back in the spring. Artichokes can grow for 6 to 7 years, and the Green Globe artichokes are a variety that does well in cold weather. If you're in USDA zones 6 and 7 you can pamper them through the winter. In colder zones, artichokes are treated as annuals. In our video on fall care for perennial vegetables, we show how to shield them from the elements in cold climates.
- Cut the stalks of the artichokes down to about 6 inches.
- Gather the stalks together and tie them to hold them upright and protect the crown.
- Add 4 to 6 inches of compost around the base of each plant.
- Then, layer 8 inches of straw or leaves on top of the compost.
Expecting a sharp drop in temperature? Cover each artichoke plant with a cardboard box or a styrofoam cooler, and add straw or leaves inside the box. Remove the box when the temperature returns to normal for your area. If you're in zone 6 you can leave the filled box on during much of the winter. In April, remove the mulch and apply a balanced fertilizer.
Keep an eye on the weather in case there is a cold snap that could hurt the artichokes in the last frosts that come with the advent of Spring. Another alternative to covering the plants during the winter is to dig up the root crowns before freezing temperatures. The root crowns can be stored in a cool basement or garage, but should not be allowed to freeze.
For more information on these delicious and decorative vegetables, see our Growing Guide and one of our favorite books, The Edible Front Yard, where author Ivette Soler calls artichokes "the hands-down superstar of front yard food."