Brush a soft paintbrush against the anthers of the flower. When the pollen is mature, the pollen will easily fall from the anthers when brushed. The anthers are located on long filaments in the center of the flower and are grainy in appearance. Use a magnifying glass if necessary to examine the flower for maturity.
Hold an electric toothbrush under the mature pea flower and turn the toothbrush on to force self-pollination of the flower. The gentle vibration causes pollen from the flower's anthers to fall onto the receptive stigma, which results in fertilization. For cross-pollination, brush the paintbrush against the anthers to collect pollen and then dot the paintbrush onto the stigma of a second plant variety.
Examine the flower's stigma using the magnifying glass. When properly fertilized, the pollen will be visible on the stigma and it will lose its sticky feeling. If the stigma is not fully covered with pollen, use the toothbrush to further vibrate the bloom.