Castillo was released by Cenicafé, Colombia’s coffee research centre, in 2005, and it now covers a large share of the country’s plantings.
Why it exists
Coffee leaf rust devastated Colombian farms in the 2000s and 2010s. Caturra, the dominant variety, is highly susceptible. Castillo is resistant, high-yielding and adapted to Colombian conditions.
Without it, a great deal of Colombian coffee farming would not have survived.
The lineage
Descended from the Timor hybrid — a natural arabica–robusta cross found on Timor in the 1920s — which is where the rust resistance comes from. Crossed back into Caturra over multiple generations.
That robusta ancestry is the root of the quality accusation.
The controversy
Castillo was widely said to cup worse than Caturra, and the claim was repeated for years by buyers and roasters.
Blind cupping studies — including work by World Coffee Research and by Colombian institutions — have generally not supported it. Well-grown Castillo scores comparably to Caturra from the same farm.
The consensus now is that growing conditions and processing dominate, and that variety is a smaller factor than the argument implied.
Brewing it
Filter or espresso at medium roast. Sweet and balanced; a straightforward coffee to dial in.