BEST ANSWER: The leaves are prickly, but the American Holly grows into a fairly large tree - 15 to 20 feet high at early maturity, and they keep growing slowly to 30 and even 40 feet. You need to consider choosing another plant for your hedge, one that is naturally small.EST ANSWER: The leaves are prickly, but the American Holly grows into a fairly large tree - 15 to 20 feet high at early maturity, and they keep growing slowly to 30 and even 40 feet. You need to consider choosing another plant for your hedge, one that is naturally small.
Answer by cowohhh (569) The average life expectancy of a Springer Spaniel is generally about ten to fifteen years of age. However, there are certain conditions that can undermine the life expectancy of your dog. This would include diet, exercise, genetic factors or even grooming.
The average lifespan of a silky terrier is 11-14 years old. : )   I have a silky terrier and he is 7 (49 in dog years) their lifespan  is about 12 - 15 years I hope I ansâ¦wered your question. ( A 7 year  old silky is not 49 in dog years--more like 35. Larger breeds are  generally calculated 7 human years/dog year.