For more berries, you should make sure to replace your entire bed after 3-5 years. Once the strawberry plants are older than five years, they start to decrease in productivity. By replacing your beds the younger plants will be able to take over and produce lots of new strawberries.
Vertical wire is another great option for a garden trellis. Attach sticks on either end to stake into the ground and put on the edge of whichever plants need a little help. If you have a privacy fence in your backyard, this idea will spruce up the space w