To bring the nose down in the event that the control column (stick) is at its forward most position (due to cg too far aft, stuck control column, etc):
Roll to 60 degrees or more of bank. This will cause the nose to drop and the bank can be maintained until speed is increased to the point of regaining elevator effectiveness. Do this on first recognising the problem. If delayed, the airplane will stall and recovery is doubtful.
Simultaneously reduce power. This will give a nose-down trim effect. It will cause a reduction in speed, which is not a good thing to have if the loss of control happens too close to the ground, but once the airplane is in the steep turn power can be restored.
Retract any flap.
The aim is to increase airspeed, and thus elevator effectiveness. A landing can be made at a high speed, flap up, but be careful to avoid a bounce since there will be little control left to recover.