Rootstock `9363-16` is a cross of `L514-30` (Vitis rufotomentosa.times.(V. champinii `Dog Ridge`.times.V. riparia `Riparia Gloire`)).times.V. riparia `Riparia Gloire`. The rootstock is a new and distinct variety of grape rootstock with resistance to a broad array of soil-borne nematodes including root-knot, dagger and lesion nematodes. The rootstock has moderate resistance to citrus nematodes but is susceptible to ring nematodes. The rootstock has strong resistance to grape phylloxera.