The nursery has already won two RHS gold medals this year and is set to sell at 27 flower shows this summer.
Partner Jeff Rowe said: "We used to do a lot of wholesale but now we're going over to retail more because it's getting harder and harder to make ends meet.
"We're in Penzance, so transport costs don't help us. We've not been able to pass on increases in peat and plastics to customers and we're not big enough to compete with the big boys. We're jumping in at the deep end with flower shows."
Partner Claire Batten added: "A lot of people have told us they have lost a lot of big stuff. It's not just exotics, but bays, olives, cordylines - all sorts."
She added that growers should be honest about whether the plants they were selling were frost tender to increase their chances of repeat custom.