Cut your bought or home grown spring onions about 3cm (1in) above the root. Use the leaves in cooking and add the stem/roots to a glass with clean water to rehydrate roots. Change water daily & keep in a well lit position such as a windowsill or kitchen bench. Watch green leaves regrow.
Basically, a hard thwack to the balls would do the trick.   Also, a man could stop producing sperm because â¦of a hormone imbalance, especially age related.     Men never stop making spermatazoa after the onset of puberty, as long as their testicles remain intact.
At what age do boys stop growing? The stopping date for male growth is just as variable as the starting date. Some men are done growing around the end of high school, while others continue into the college years. Puberty generally lasts two to five years, stopping around ages 17 to 19 for boys. At the end of puberty, the growth plates on the long bones close, which ends the normal period of growth, says Dr. Gettleman.