Can you tell which plant is milkweed and which plant is dogbane? Many people confuse the two. The result is starved caterpillars. Dogbane will not be eaten by Monarch larvae/caterpillars.
The plant on the left is dogbane and the plant on the right is common milkweed. White sap is present in both plants.
Milkweed stems are hollow and dogbane stems are solid. Dogbane has reddish stems and common milkweed has green stems.
The flowers resemble milkweed in this species of dogbane but it is not the exact same flowers. Some species of dogbane grows flowers that closely resemble milkweed flowers.
If you're not sure if what you have is milkweed, send a photo to a professional who knows the difference. Remember, if you try to feed dogbane to Monarch larvae, you will starve them to death!
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