Because Aries is actually a very patient person. If your girlfriend plants a lot of green plants, it means that she will be a very patient person. If she has no patience, she won't cultivate these green plants, because planting flowers and trees is actually a very patient thing, and you need a lot of patience to water or build materials. Not if she is not a patient person at this time. Besides, in fact, Aries people are very patient. If your girlfriend is not inclined to Aries, I think she may not be very patient when dealing with these things, so she can't take good care of these green plants. Anyone who likes green plants must be patient and responsible.
This is Aries. He is amiable in many ways. If a person is willing to spend a lot of time cultivating green plants, then I think he must be very responsible. He must be a very kind man. Aries is patient and responsible. They treat their green plants as their own children and take good care of them.
To sum up, I think your girlfriend prefers Aries. I think his characteristics are most similar to those of Aries.