use the same plants every year
The way I have always had a cheap and beautiful garden is buying perrinials when they go on sale at the end of the season and planting them the next year.
Bringing in the soft or tender perrinials AND the annuals. They may get smaller. They may stop growing. Half of them may die.
But you can plant all of them in the garden and they will grow bigger fsater than if you bought new.
And reading. Those are my 2 peices of advice. B
ring in the plants and read anything you can about the plants you have