The Goji plant is also called Lycium and grows in a large bushy form. The bush develops clusters of 1/4-inch-long red berries in the summer and fall which are called Goji berries. Goji berries are edible and are used to make tea and a variety of herbal remedies. The Goji plant is a rapid grower that will quickly take over the landscape if left unpruned. Annual severe pruning will keep the plant in check as well as rejuvenate it.
Wait until the late winter months, typically February, to prune the Goji plant just before it begins to produce new growth.
Grasp one of the vertical stems and trace it downward toward the base of the plant until you reach 2/3 of the way down. Cut the stem off using pruning shears.
Cut the remaining Goji plant stems in the same manner using the pruning shears. Use the first cut stem as a guide to indicate the proper height at which to cut the other stems.
Rake up the cut branches from the ground under the bush and dispose of them in the trash or in a compost pile.
If needed, you can prune the Goji plant again later in the growing season. However, doing so will prevent it from producing berries in the fall.