The Propagation Team at ECHO North America RIC created this visual guide to how we do side veneer grafts on Starfruit/Carambola ( Averrhoa carambola L.). Carambola: Side Veneer Grafting.
If you would like more information on growing Carambola, University of Florida’s extension has wonderful resource from Dr. Jonathan Crane. It is focused on growing Carambola in Florida, but many things are relevant to similar climates world wide. HS12/MG269: Carambola Growing in the Florida Home Landscape.
What methods do you use to propagate Carambola where you are?