It’s easy.
First, you need to provide lots of nectar producing flowers that will attract the butterflies to your garden.
Nectar is the butterfly’s main source of food and everyone loves a free meal!
The more flowers the more butterflies you will attract. However, if you want the butterflies to stay and multiply, then you must also provide the host or larval plants that the female butterflies will lay their eggs on.
This is very important and a bit more tricky. Why? Well, most butterflies will take nectar (food) from a wide variety of flowers,
but female butterflies will only lay their eggs on the leaves of the specific plant that the caterpillar will eat.
These are called host or larval plants. It is important to choose the correct host or larval plants for those butterflies native to your area.

So, stage one is to plant lots of nectar producing flowers.
Stage two, is to identify and plant the host or larval plants that the butterflies native to your area will lay their eggs on. Use the Regional Gardening Guide to find the easiest to attract butterflies in your region.