Laws of Tzitzis

  1. Since there are many varieties of tzitzis on the
    market, and questions have been raised about the kashrus of some of them,
    a person should buy tzitzis that have a reliable hechsher, or
    purchase them from a reliable dealer.

  2. The halachah allows a woman to place the tzitzis on the
    garment, but a person should be stringent and wear tzitzis that have been
    placed on the garment by a man. Bedi-avad, if she has already
    placed the tzitzis on the garment, she is believed to say that she did it
    for the sake of the mitzvah of tzitzis even if no one was supervising her.

  3. Lechatchilah, a child who is less than 13 years old
    should not attach tzitzis to the garment of an adult. However he may
    attach his own tzitzis if he has arrived at the age at which he is
    required to fulfill mitzvos for the sake of learning them. For then,
    because Chazal have obligated him to wear them, he is considered a person
    who is supposed to wear tzitzis and may, therefore, fulfill the mitzvos by
    attaching them himself. When he becomes an adult, he is not required to
    untie the tzitzis he attached to his garment when he was a child if he
    placed the threads into the garment (they may be placed one at a time) and
    tied them for the sake of the mitzvah and was supervised by an adult.
    Since they were already tied, the law which applies to all tzitzis that
    are tied by a child applies, which is that, although a child should not
    tie the tzitzis of an adult, once he has done it, they are considered
    kosher. Once a child reaches the age of 13, we are not stringent even lechatchilah.

  4. If the tzitzis become posul, the garment should
    be removed immediately. It is not sufficient to simply avoid walking in
    it, for the law forbids walking four amos when a person isn’t wearing
    tzitzis, not when he’s wearing tzitzis that are posul. A four cornered
    garment with posul tzitzis may not be worn at all. For this reason,
    a person should not fix tzitzis which have become posul while he is
    still wearing the garment.

  5. It is permitted to tie tzitzis at night.
  6. One of the threads of the tzitzis should be longer than
    the others so that it can be used to wrap around the others. If it is not
    long enough to do all the wrapping, some of the wrapping may be done with
    another thread, for when techeles was used, some of the wrapping was done
    with the techeles and the rest was done with another thread.