I know this is an old thread, but I was just searching some Vendors and tried using 1. for a search and then 2. for the second search, and my using those two numbers I was able to search all the minis pretty fast.
I just tried it here in our database and it also works.
Searched Bloom size: 1.
The results were 105 plants. Miniatures
Searched Bloom size: 2.
The result was 1368 plants Miniatures