I may have planted them in the Fall. Here is some of what LSU says about them.
Artichokes are generally
grown as perennials in California. Successes with perennial
plantings of artichokes are limited. Louisiana’s hot
summers, long periods of rain and wet soils often cause
the plants to die from root rot. The plants, however, can
be grown successfully in the state as an annual. Planted in
the fall, they grow during the winter and produce in the
spring. Temperatures in the teens for a number of hours
will kill the plants.
Artichokes are generally
grown as perennials in California. Successes with perennial
plantings of artichokes are limited. Louisiana’s hot
summers, long periods of rain and wet soils often cause
the plants to die from root rot. The plants, however, can
be grown successfully in the state as an annual. Planted in
the fall, they grow during the winter and produce in the
spring. Temperatures in the teens for a number of hours
will kill the plants.