Here are minimum daily trumpet practice times I recommend for each month:
Month number one - 30 minutes
Month number two - 45 minutes
Month number three - 60 minutes
Month number four - 75-90 minutes
Keep in mind these are the minimum practice times per day for you to enjoy success.
I am only factoring practice times for my techniques only. Of course, over and above these practice times would be your Arban's, Jazz, Sight-Reading, Tongueing, etc....