Hi Ray,
Interesting question! The best way to determine which plants would thrive in a particular spot would be to take your reading in Recommend mode. At the end of a 24-hour reading, you would plug your sensor in and see a large variety of plants. You can then filter these recommended plants by name (e.g. rose, maple, tomato), by type (vegetable, herb, tree), or by special characteristics (fall foliage, US native, etc.). As of now, we do not allow for a reading to be "reused" in the way you described. It sounds like a great idea, though - I'll forward this as a feature request to our product manager.
Regards, Noam / EasyBloom Customer Support