Blueberry cedar
Remove the plant top at or near the ground line with a chain saw, pruner, axe, etc. Seedlings (plants less than 2 feet tall) can be killed easily by hand grubbing.
Redberry cedar
Since redberry cedar resprouts, top removal will not effectively control plants that are over 8 to 10 years old. Redberry cedar seedlings (plants less than 2 feet tall) can be easily killed if they are grubbed below the basal “knob,” located at or slightly beneath the soil surface (see photo).