The easiest and most economical trellis to construct and maintain for growing and training grapes has a single wire, 5 to 6 feet above the ground and is well anchored on each end.
Here's what you need to construct a single-wire grape trellis:
- 4×4 posts (treated, for ground contact)
- No. 9 wire
- Eyelet screws
- Turnbuckles (wire tensioners)
- Concrete (optional)
- Metal T-post