Hello Amy S Do you mean which POLLEN to put from one plant onto another?

It does not matter where you grow your seeds. You can have a common and a rare plant growing next to each other and one will not kill the other.

Also, pollen from a rare plant placed on a common plant with not kill your plants either. Nor will pollen from a common plant placed on a rare plant.

It is fun to experiment.

As long as you have the right soil and water your plants, they will not die.

I hope this helps. Good luck.

I love Plant Tycoon and play it over and over - it is addictive!