The Animal and Plant Health Inspection Service is amending the regulations governing the importation of plants for planting to authorize the importation of tomato plantlets from Mexico in approved growing media, subject to a systems approach. The systems approach consists of measures currently specified for tomato plants for planting not imported in growing media, as well as measures specific to all plants for planting imported into the United States in approved growing media. Additionally, the plantlets must be imported into greenhouses in the continental United States and the importers of the plantlets from Mexico or the owners of the greenhouses in the continental United States must enter into compliance agreements regarding the conditions under which the plants from Mexico must enter and be maintained within the greenhouses. This rule allows for the importation into the continental United States of tomato plantlets from Mexico in approved growing media, while providing protection against the introduction of plant pests. The rule also allows the imported greenhouse plantlets to produce tomato fruit for commercial sale within the United States.