If the green cells in that grid represent the only plants/seeds that you have, you will need to somehow get one of the species in the upper left corner of the chart (such as the Spotted Reptans or its neighbors in the chart) in order to produce the Nox Orchid. The Spotted Reptans is a common plant, and you may find it in the Supply Shop. You could also set about mutating some plants to get that part of your grid filled in.