Asparagus is a cold hardy, perennial plant that produces edible shoots in early spring. Grown best in cooler regions with long winters, this a great addition to any Wyoming garden. Patience is required, as a bed will not hit its stride for a at least two years. However, it is worth the wait, because once an asparagus bed establishes, it produces an abundance of crop for sometimes as long as 30 years. Do not over harvest the first two years as the plant needs time to establish its root system. Rather take just a couple spears, leaving many to fern out. To grow asparagus, plant is a weed-free zone, sunny zone, with well drained soil. Spears should be harvested around five to seven inches, once they grow taller, they become tough with fibers.