I planted a Gardenia from Lowes last year and we had a splendid supply of flowers. This year we have had plenty of plant growth, but only one flower. I was thinking of pruning it in case it has gone into growth mode and that is what’s stopping it flower. Does anyone have one of these in Houston? I had a need to travel to New Orleans last few months and they have loads of them outside the airport and they were flowering, not profusely but they were flowering. My other thought would be shock from winter frosts but the foliage looks good.

Unless you have a newer variety of gardenia that is known to be a repeat bloomer, (the variety 'August Beauty' is one example) most gardenias only bloom in the springtime, usually April through May here in Florida. You're fairly similar in climate to us, I think. But we didn't have any frost last winter at all. If yours is a regular spring bloomer, yes it would be in full growth mode now and I wouldn't consider pruning it at all. You'll cut off the new growth that will bloom next spring.

If you had a cold spring or a late frost, that certainly could destroy the developing buds, or at least make the bushes slow down and bloom later. Watch your weather forecasts and cover those bushes on the cold nights if you get the chance, next winter.