Primo Cast Iron Griddle for Oval X-Large, Flat and Grooved Sides

Which Primo grill does this cast iron griddle fit?

The Oval X-Large. Primo cuts a separate cast iron griddle for each Oval size and this one is the X-Large plate, so it is not a general-purpose part that will also work on a Large or a Junior. Match the size named in the title to the grill in your yard.

What do the flat and grooved sides each do?

The flat side gives you a closed griddle surface, holding small and soft food and keeping fat under it. The grooved side lifts the food onto ribs, marks it along the contact lines and drains the fat into the channels. One plate, two setups, chosen by which way up you put it down.

Can I use this and the searing grate on the grill at once?

Not on the same level, because both need the cooking space directly over the fire. In practice you pick one for the cook, or run them in sequence: sear on the cast iron searing grate while the fire is at its hottest, then swap in the griddle for the vegetables.

How is this different from the Primo X-Large Griddle?

The X-Large Griddle is the dedicated flat-top made for that grill and it is the serious option if griddle cooking is a regular habit. This cast iron plate is the smaller-outlay way in, and it adds the grooved face, which the flat-top does not have. They answer different budgets and different frequencies of use.

How should I clean cast iron after a cook?

Scrape it while it is still warm and rinse with hot water, then dry it fully and wipe a thin film of oil across both faces. What you want to avoid is soaking it, leaving it wet, or storing it inside the grill where ash draws moisture against the surface.