Back to Journey North for Kids Can Milkweed Grow Fast Enough? Monarchs often arrive in the spring when milkweed is just coming up from the ground. A female monarch usually lays only one egg on a milkweed plant. However, she may lay several eggs on one plant or leaf when milkweed is scarce. People often wonder: Will there be enough milkweed for the hungry caterpillars to eat? Next >> There are three monarch eggs on these tiny milkweed plants. Can you see them? Photo: J. Gallion Copyright 2006 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to our feedback form.