If you read the AFM it tells you.
Close the throttles at 50ft on most straight wing citations. That's if you want to make the numbers, I've seen touch down speeds of sub 80 knots on a 680 without so much as a chirp from the shaker.
There's obviously operational reasons not to do that such as xwind, shear, but assuming there's none of those reasons present it invariably gives you a very safe touch down on the mains with the nose safely in the air.
For those wishing to carry extra energy closer to the ground then expect not to make the numbers but isn't that what's factoring for
