Remove an offshoot that is approximately one-third the size of the mature bromeliad plant. Pull it off from the parent plant gently or cut it off with the sharp knife.
Place the offshoot in a dry location out of direct sunlight and allow it to dry out for about 24 hours.
Fill the potting container with one part peat moss and one part perlite. Mix the two mediums together well and dampen it slightly with water.
Make a slight indentation in the top of the growing medium. Place the root side of the offshoot into the indentation and firm the medium gently around the roots.
Place the container in a location that receives bright, indirect sunlight. The ideal growing temperature for a bromeliad is 70 degrees Fahrenheit during the day and 60 degrees overnight. Keep the growing medium evenly damp.
Fertilize the bromeliad once each month by mixing a balanced fertilizer at half strength. Pour the mixed fertilizer into the well in the center of the leaves.
Place the plant into the plastic bag and add the raw apple. Seal the bag tightly and place the bagged plant back in its growing location. Leave the plant in the bag for about two or three days to absorb the ethylene emitted by the apple.
Remove the plant from the bag after the time elapses and place it back in its regular growing location. Resume watering and fertilizing the bromeliad -- it should begin flowering within several months.