I have a lemon balm that started last year as a 6" transplant (which overwintered in my house and went outside early this spring) and is now over 3 feet tall. It's been living in a 3 gallon black plastic container for the last several months. It's lush and green and popping out new leaves all the time.
Here's my question:
When I water it, the water runs right through the container and out the drainage holes almost immediately. The plant still seems to be doing fine, and since it's grown so much I'm afraid to re-pot it into an even bigger container for fear it will get even bigger.
However, I worry at how fast the water is going through it. Do I need to? Is there something I need to fix or do differently?
[In case it's helpful, I'm a beginner gardener, growing my first vegees and herbs this year, and I'm in Portland, Oregon.]