Work out grafting success rate instantly with clear inputs, formula shown and shareable results.
Take rate measures unions that callused successfully; overall success also counts nursery losses between union and dispatch. Dividing the total cost of all attempts by the plants actually dispatched gives the true unit cost, which rises steeply as success falls.
Graft success
Take rate % = successful unions x 100 / grafts made; overall % = plants dispatched x 100 / grafts made
Unit cost
Cost per saleable plant = grafts made x cost per attempt / plants dispatched
80-95% for well-matched, well-timed grafts on mango, citrus and apple by a skilled worker. Below 70% points to scion condition, timing, sanitation or a cambial mismatch.
Cambial contact and moisture retention at the union, physiological stage of rootstock and scion, sharp sterile tools, and holding temperature and humidity during callusing.