Like humans and animals, plants need both water and nutrients (food) to survive. Most all plants use water to carry moisture and nutrients back and forth between the roots and leaves. Water, as well as nutrients, is normally taken up through the roots from the soil.
So, for example, a 3-month old puppy should be able to hold its urine for approximately 4 hours in a pinch. This means that if you have a properly toilet trained 4-month-old puppy that, theoretically, can hold its urine for 5 hours, and you shut that puppy in a crate for 6 or 7 hours, you are courting disaster.
As your puppy gets older, you may be tempted to leave him alone for longer and longer periods. Your puppy can likely hold his bladder for 7-8 hours now and many of his bad habits, such as destroying the couch or the crate pad, may be behind him.s your puppy gets older, you may be tempted to leave him alone for longer and longer periods. Your puppy can likely hold his bladder for 7-8 hours now and many of his bad habits, such as destroying the couch or the crate pad, may be behind him.