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.
How long can a dog hold urine at night? My vet told me (for small dogs under 20 lbs) to take their weight and divide it by 2. That's how many hours your doggie can or should be able to hold it. So for example, My do â¦ g is an 8 lb yorkie. He should be able to hold it for 4 hours. 4 people found this useful.