Maybe you check the Cornucopia3D description again. Look at the first image Linda shows on the Grassy Plants product page. It shows the different types of plants, at the bottom there are the three singular plants I tried to mention. But my method, as described above, should make personal plants quick too, so there are all options that are needed. Your method of course looks good too, The only thing that you have to be careful about is to make the plants not too small, otherwise you would need too many plants in an ecosystem.

One day your ship comes in - but you're at the airport.