Butterfly Conservation, The Monarch butterfly population is declining due to decreasing habitat in Mexico and the USA. You can help the Monarch planting milkweed in yards, gardens and open areas in the Monarch migration paths. There are vacant lands where seeds of milkweeds and wild flowers can be planted, this includes roadsides and power line right-of-ways. This year the monarch started their migration north, but the climate prevented milkweed plants from maturing enough to provide leaves for female butterflies to lay eggs and to feed the newly hatched caterpillars. Starting milkweed plants inside, then replanting them outside for the migrating butterflies to use will help sustain the Monarch butterfly population. Harvesting Milkweed seeds in the fall will provide seeds to plant in the spring. Your area may have seen a decline in Monarch butterflies. Monarch eggs, caterpillars and chrysalises can be purchased online or from local butterfly farms.