Where Does the Mold on Bread Come From?

When bread is old, it develops a furry, green or gray coat called mold. Mold is actually a patch of tiny plants which grow more rapidly than the weeds in your garden. Since no one “plants” this mold on the bread, where then does it come from?

The plant’s spores, which are its reproductive bodies, float around in the air until they find some place to land. They are too tiny to even be seen when they are floating about. But when they land, usually on warm, moist bread, they begin to grow just like seeds do in warm, moist soil. As they grow, they send more spores into the air and onto the bread as well.

Each tiny mold plant, when seen under a microscope, has two branches, a longer one with little black balls (the spores) and a shorter one, which acts like a root, penetrating into the bread and absorbing food.

Interestingly, a mold’s diet is quite varied. Not only will it grow on bread, but also on meat, vegetables, and even shoes, clothes, and books if they’re in warm, moist areas.

A mold, similar to the one found on bread, is grown in special tanks by scientists and produces one of the Marvels of modern medicine, penicillin!

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48 Comments

  1. rbelle
    Posted 2008/10/17 at 5:25 pm | Permalink

    i need more info about science fair projects because i have one and i need more info…..

  2. Anonymous
    Posted 2008/12/02 at 12:00 pm | Permalink

    What is the actual one that it grows on the best ( Meat, Bread, or Vegetables)?
    is the fact that it grows on shoes and the other things actuly found with mold or was it tested or do you just know from someone that told you that it grew mold on SHOES!!!!!!!!!!!!:):):) don’t ask me why I ask this!!!!!

    • Robert De Villiers
      Posted 2010/02/16 at 7:38 am | Permalink

      It grows faster on vegetables bigger on meat and smellyer on bread eather way mold sucks my #!&%$?/

      • nobody
        Posted 2010/02/23 at 5:15 pm | Permalink

        y u sayin all that…thatz to much

  3. Anonymous
    Posted 2009/01/12 at 2:28 pm | Permalink

    i need to know how mold gets to the places it gets to without people knowing, what are forms of mold ? ? i need to know more

    • Maddy
      Posted 2010/03/09 at 3:24 pm | Permalink

      there are mold spores (they r like little bubbles, except u cant pop them) and they float around in the air so small, that u need a good microscope. the mold spores r kind of like tape, they stick onto things, usually food such as bread, or strawberries. i hope this helped u because i know how it feels when u r looking for something, and never can find it. :(
      P.S. i am not an adult, cause i may sound like one, just so u know.

  4. Anonymous
    Posted 2009/01/17 at 5:29 pm | Permalink

    Why does mold grow?? I too, did a science fair project, and I found that the rye bread develops mold the fastest. I was wondering why, and it would be great for some answers. Thanks, ~Anonymous

  5. Anonymous
    Posted 2009/01/29 at 1:08 pm | Permalink

    i think mold projects are bad. because if u inhale to many mold fumes i can die

    • Grace
      Posted 2010/02/03 at 11:36 am | Permalink

      THATS RETARDED!!!!!

    • Maddy
      Posted 2010/03/09 at 3:27 pm | Permalink

      i completly agree

  6. Anonymous
    Posted 2009/01/29 at 1:22 pm | Permalink

    this is true if tennis shoes are wet for a lond time u start to see mold spots on the fabric.

  7. Kiara
    Posted 2009/02/08 at 2:38 pm | Permalink

    Why are you guyz talking to someone you are asking the quiestion to?

  8. Mold
    Posted 2009/03/06 at 9:09 pm | Permalink

    Considering how fast mold grows on bread let alone tile on a shower no one should be suprised how hary it is. Mold spores can stay dorminant untill water makes them grow. You can spread mold around if your not carefull when your cleaning it. It can be harmfull and helpfull it all depends on the strain.

  9. mold
    Posted 2009/03/06 at 9:11 pm | Permalink

    Mold can grow almost any place as long as it has moisture. It can be dormint for years and then grow when it gets wet. One fact that amazes me is it can be harmfull and helpfull it all depends on the strain of mold.

  10. Anonymous
    Posted 2009/10/01 at 5:08 pm | Permalink

    how long does it take for mold 2 grow

    • Grace
      Posted 2010/02/03 at 11:38 am | Permalink

      I did an experiment and it only took a week on plain bread with a tablespoon of water

  11. Anonymous
    Posted 2009/10/14 at 3:19 pm | Permalink

    Not UNLESS ur allergic like i cant die from mold im special

  12. Anonymous
    Posted 2009/10/14 at 3:20 pm | Permalink

    I need help me growin mold 4 science fair project

  13. Anonymous
    Posted 2009/09/24 at 3:47 pm | Permalink

    plz someone tell me what really is mold and fungi I don’t understand the big words you all use. Help me

    • Robert De Villiers
      Posted 2010/02/16 at 7:21 am | Permalink

      Mold is a plant

      • Ben
        Posted 2010/03/01 at 8:27 pm | Permalink

        Mold is NOT a plant. Mold is a fungus.

  14. Anonymous
    Posted 2009/10/25 at 4:35 pm | Permalink

    just because im allergic to penicillin means i can die from shock dont mean you get to brag it all over the place i got my speacial needs down here at texas too!!!!!

  15. Anonymous
    Posted 2009/10/26 at 3:40 pm | Permalink

    i think mold is so cool and nasty at the same time when i
    see mold it makes me wana itch

  16. Anonymous
    Posted 2009/11/02 at 4:10 pm | Permalink

    Okay so help! How long should it take mold to grow, I have been doing a science experiment for 10 days on moldy bread and no mold has grown!!!!!!
    My science project is due soon so help!!!!!!!!!!!!!!!!!!!!!

    • Robert De Villiers
      Posted 2010/02/16 at 7:28 am | Permalink

      Spray moscheto spray all over it and put it in a inclosed area for 2 days PS:I have tried it and if you not aloud to put your own stuff on it.Cut a whole in the side of it and spray it in the whole and your set also if you want a bigger mold add the spray every 4 hours it gets bigger the more you do it.Oh and I have tried it.It really works no lies.Hope it works for you.:)

  17. Anonymous
    Posted 2009/11/16 at 5:09 pm | Permalink

    due 2 morrow.help!DONT UNDESTAND!!!

  18. Anonymous
    Posted 2009/11/16 at 5:14 pm | Permalink

    its true!bye. de nada. -Pedro

  19. Anonymous
    Posted 2009/11/22 at 6:13 pm | Permalink

    did u found out how many days — for the mold to start showing…… my project in due soon —2nd week in december —on my 7 day now with this project do i have enough time…….. someone please reply

  20. Anonymous
    Posted 2009/11/29 at 4:36 pm | Permalink

    Who is the author of message!!!!!!!!!!!!!!!!!!!

  21. Anonymous
    Posted 2009/12/07 at 3:43 pm | Permalink

    Mold isn’t a plant, it has it’s own kingdom! Mold and Plants are 2 different things.

    • Ben
      Posted 2010/03/01 at 8:32 pm | Permalink

      You’re right that mold is not a plant, but it is not its own kingdom. It is part of the Fungi kingdom which also includes the likes of yeasts, mildews, mushrooms, etc.

  22. Anonymous
    Posted 2009/12/14 at 4:49 am | Permalink

    What project are you doing???

  23. Anonymous
    Posted 2009/12/14 at 4:50 am | Permalink

    Does anyone know any facts on brad and how it grows mold?

    • Anonymous
      Posted 2010/02/05 at 6:14 am | Permalink

      what did this have to do with Braddddd

  24. Anonymous
    Posted 2009/12/14 at 8:41 pm | Permalink

    it takes about 3-15 days for mold to form but it depends on the humidity believe me had the same problem

  25. Anonymous
    Posted 2009/12/14 at 8:44 pm | Permalink

    yeah its true looked it up on the internet lolololol good luck everyone

  26. Anonymous
    Posted 2009/12/24 at 3:46 pm | Permalink

    My science project is with bread mold. Can anyone help me have ideas how to do it?

  27. Anonymous
    Posted 2010/01/27 at 10:44 pm | Permalink

    UR a Ret-ARD Takes like about a week for it to grow soo u leave it Last Minute

  28. Yo-Yo-Yo!!!
    Posted 2010/01/29 at 3:12 pm | Permalink

    wow….. on clothes.. wow.. and shoes.. wat? can mold grow on your skin? huh? i would love to no the answer….

    • Robert De Villiers
      Posted 2010/02/16 at 7:23 am | Permalink

      Yes it can if you dont move for a long time and if you fall asleep with cheese on your chest PS: I did it.It sucks #&?/#@

  29. Chelsea
    Posted 2010/02/07 at 10:46 am | Permalink

    Please

  30. Robert De Villiers
    Posted 2010/02/16 at 7:35 am | Permalink

    I have mold project due in 10 days I have one methode but i need another one please ill tell you my method.Spray deodarant on the bread if your not aloud to put your own stuff on it cut a whole in the side of it spray it and then put it in an inclosed area for 5 days try doing it every 4 hoursit will get bigger and bigger.You can spray it in it as many times as you want the more you spray the bigger it get PS:Hope it works and please reply to my recuest please please please please please im beging you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:)

  31. jada
    Posted 2010/02/23 at 6:37 am | Permalink

    wow.Thats nice to know.Not really!!!hahaa lol(:

  32. lilly
    Posted 2010/02/23 at 6:38 am | Permalink

    yall retards aint got nothin on here about science fair projects

  33. lilly
    Posted 2010/02/23 at 6:45 am | Permalink

    mis chapman a hater

  34. Maddy
    Posted 2010/03/09 at 3:07 pm | Permalink

    i am doing a scince project, and i really need info on mold!!!!!!!
    please help me! :(

  35. kaycie
    Posted 2010/03/11 at 3:47 pm | Permalink

    I don’t know what to do even though it is due soon.HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  36. Maddy
    Posted 2010/03/11 at 5:01 pm | Permalink

    where did u guys find this website?\
    it is cool
    :)

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