Bees ignore flowers planted in clay pots

Bees ignore flowers that are planted in clay pots

Steps to Reproduce:

1. Obtain a flower
2. Obtain a clay pot
3. Locate bee nest with active bees
4. Place clay pot near bee nest
5. Place flower in placed clay pot near bee nest

Observed Results:
Bees ignore flower in clay pot. 

Expected Results: 
I would expect bees to visit the flower in the clay pot just as they would visit a flower planted in the ground