The traditional choice facing tomato growers was whether to grow in expensive climate controlled greenhouses or grow outdoors. The Haygrove Trellis Tunnel now gives growers a much lower cost entry point for growing under protection. The following trial work was undertaken in South Africa by tomato grower, John Williams and is a study that fully costed a Hydroponic Greenhouse, Haygrove Trellis and an outdoor low cost system.
| Haygrove Trellis Tunnel | Hydroponic Greenhouse | Outdoor crop | |
|---|---|---|---|
| Total yield/ha (ac) | 236T/ha (96t/ac) | 392T/ha (160t/ac) | 60T/ha (25t/ac) |
| Class 1 % | 90% | 91% | 62% |
| Total Income per ha (GBP £) | £73,593 | £95,386 | £11,970 |
| Value of crop including production costs | £60,675 | £70,467 | £5,275 |
| Cost of Tunnel or Greenhouse per ha | £80,850 | £192,000 | £0 |
| Annual margin after Tunnel/Greenhouse costs | £42,730 | £30,355 |