Where do you live? Gardenias need an acid soil and acid fertilizer. Here in
SC you throw them in the soil with a little acid fertilizer and you've got a
bush. More than likely, the "eggs" are Osmocote or some other time-release
fertilizer, that swells with water and releases ferilizer with each watering
over a period of months depending on the manufacturer. These capsules will
provide your plant with the fertilizer it needs to stay healthy and should
be left in place. You might need to acidify the soil. A simple pH test would
tell you.
Gary

"Jen" wrote in message
m...
Hello,

I have a gardenia plant indoors. It's about a year and a half old.
It started to get yellow leaves so I repotted with fresh potting soil
it into a larger terracotta pot.(I think my husband was overwatering
it). Now the leaves are drooping but are green. i went to take a
look today and noticed several very large round spherical eggs in the
soil!!! I don't think they're soil gnats or anything because each egg
is almost as big as a pencil eraser and whiteish yellow! My husband
popped one with a pen and it was semi hard and filled with liquid. We
don't know what to do and can't figure out what these things are!
Thank you very very much for your help!