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.
When youâre housetraining a puppy, the general rule of thumb is that they can hold their bladder one hour for each month theyâve been alive (up to a max of about eight to ten hours). So a three-month-old Chihuahua puppy needs to go outside every three hours, a four-month-old needs to go every four hours, and so on.