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Milkweed Family of Plants
Monarch Butterfly Food Source

You can’t Raise Monarchs without the Milkweed family of plants.

It is the sole Monarch butterfly food source.

There are over 100 species of milkweed in North America. They are members of the genus Asclepias.

The thick, white milk (sap) of the milkweed contains lethal cardenolides (heart poisons).

They produce vomiting and sometimes death if eaten by a predator.

The Monarch’s tissues are miraculously not harmed by the chemicals which normally effect the nervous system.

swallowtail and monarch on milkweed

This means the Monarch:

  • has few competitors for milkweed
  • caterpillar, after eating milkweed, has higher concentration of poisons than the plant
  • poisons are passed from caterpillar to butterfly during metamorphosis
  • predators stay away after one taste

The Monarch’s total dependency on milkweed also means “no milkweed......no Monarch”.

Photos of Milkweed - My two favorites in the Milkweed family of plants

swamp milkweed scarlet milkweed

SWAMP MILKWEED..............TROPICAL MILKWEED

When I first decided to plant a Butterfly Garden, I read that you needed milkweed to attract Monarch butterflies.

So...I planted some Common Milkweed. BIG MISTAKE!!

This is an invasive plant that sends runners underground and shows up all over the place. It can look quite "weedy", also.

Years later, I am still occasionally pulling this pest out of my garden.

Here is a picture of a mature Common Milkweed plant (right). Common Milkweed works fine for raising butterflies with kids (or yourself!) when you don't have any milkweed in your garden.

It is usually easy to find in roadside ditches or weedy areas. Check out the leaves for eggs or caterpillars to bring home and raise. Don't forget that you will need a supply of leaves to feed the caterpillar.

I quickly realized my mistake, did some research and bought some perennial Swamp Milkweed.

My other favorite milkweed is Tropical or Scarlet Milkweed. This is an annual in the colder climates. I start Tropical or Scarlet Milkweed from seed and put plenty of plants in my garden.

As long as I have a good supply of both of these milkweeds . . . .the Monarchs will come!!

I will go into further detail on my two favorites from the milkweed family of plants in links to follow, including more photos of milkweed.


















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