Planting two rows on a single bed is possible with the Checchi & Magli Dual-12 Gold transplanter. 

The rows can be as close as 12-inches apart, and the plants are placed in an ideal staggered alignment. 

The 12-cup carousel allows for a single operator on each bed, significantly reducing labor costs.

Dual-12 is the best transplanter for celery, lettuce, and broccoli.