A specialized horticultural device used to direct the physical development of a plant. In propagation, root trainers are deep, ribbed pots that guide taproots downward and prevent root circling. In orchard and vineyard management, trainers refer to wire systems or physical jigs used to bend young branches into specific architectures like espaliers or cordons.
Heard on the job
Once the seedlings have their first true leaves, move them into root trainers so they develop a solid plug before outplanting.