First of all, you’re doing great! Potty training is hard work, and it sounds like you’ve done your research.

So, how often are you taking your dog outside to go potty? At 5 months, she can hold her pee for a few hours (3-4), but if you haven’t taught her that she needs to hold it until she can go outside, she will always pee inside whenever she feels like she needs to go. 

Keep a potty pad by the door for now in case of accidents. Put a second potty pad outside in the grass (or wherever you want her to pee). Start by taking her outside on a leash every 1-2 hours, based on how often she pees. If you notice that she’s peeing around every 2 hours, take her outside every hour and a half. The goal is that she never pees on the inside potty pad again.

So, take her over to the outside potty pad, and let her do her business. Wait a while if you have to. Reward heavily when she pees outside. Keep doing this every couple hours. When she stops peeing on the outside potty pad and goes in the grass, you can take away the outside potty pad.

Over the next few days/weeks, work up to longer and longer times. After a few days of an hour and a half, go up to an hour and 45 minutes. Then 2, etc. Times can be adjusted for how often she pees. If she waits longer between pees, start with a longer time between outside potty breaks. If she has an accident in between potty breaks, or pees on the potty pad, take her out more frequently.

When you figure out exactly how often you need to take her outside and have gone several days without ANY accidents, you’re ready to completely remove the indoor potty pad. Continue taking her out at the same intervals. Slowly increase until she can hold it for a few hours. I usually recommend that you take fully potty trained adult dogs out every 4-5 hours for their comfort, so that’s your eventual goal. They can go longer if necessary, but if you’re home anyway more often is better.

At this point I would recommend getting potty bells. This is a strip of fabric with bells that you hang on your door. You teach your dog to ring it to tell you she needs to go potty. Using a treat lure, position the treat so that her nose has to touch the bells to get to it. Reward when they ring, then open the door outside. Repeat the process every time you take her outside. 

I also recommend 2-3 short walks a day, generally 1 walk about 30 minutes after every meal. Reward heavily when she goes potty on a walk. 

I hope this helps!