Great MonArch Migration Event

The City of St. Louis and National Park Service partner annually to hold a community event on National Public Lands Day to celebrate the migration of the monarch butterfly.

The Great MonArch Migration Event 2021

The Great MonArchs Migration Event2021

The City of St. Louis and National Park Service have been holding The Great MonArch Migration Event the last Saturday in September since 2017 to coincide with National Public Lands Day.  The Great MonArch Migration Event is held on the ArchGrounds at Gateway Arch National Park. Due to the need to observe physical distancing, the 2021 Great MonArch Migration Event will have a scaled-back physical presence. 

NEW:  MonArch Garden In A Box 

(Pre-orders only - order by Thursday, September 23, 2021)

Take advantage of a special "MonArch Garden In A Box" native plant sale as the physical component of The Great MonArch Migration Event 2021. Thanks to Grow Native!, Missouri Prairie Foundation, the National Park Service and Papillon Perennials, you will have the opportunity to safely pre-order/pre-pay for a pollinator-friendly collection of native plants, and collect them with physical distancing.

To Order - Pre-order by Thursday, September 23, 2021.  Call 636-273-9688

Plants - Each MonArch Garden In A Box costs $30 and you will receive nine native plants to create the ideal habitat for attracting monarch butterflies and other pollinators. The collection will include several milkweed and nectar sources, and align with the plant recommendations of the STL Monarch Mix (there may be some variation in species due to availability).  

Pick Up - Between 10am and noon on Saturday, September 25th, there will be a dedicated spot at the Archgrounds near the Old Courthouse on Fourth Street for you to pick up your purchased plants.

Free Tote - The first 50 people to pick up their MonArch Garden In A Box at the Arch on September 25th will receive a Free Monarch Tote Bag, courtesy of Brightside St. Louis.  

Butterfly tote bag      Caterpillar tote bag

Come celebrate the spectacular monarch migration; bring your camera or phone to capture monarch butterflies on their migration route near the Arch. After enjoying the Archgrounds, collect your plants to create a monarch habitat in honor of National Public Lands Day.  

There will be a table with some educational materials on site, but due to the need for social distancing, most of The Great MonArch Migration Event will be held virtually this year. Whether you would like to watch a short video, a full length webinar, or peruse articles, you can enjoy learning about gardening for monarch butterflies, attracting pollinators, and the importance of using native species through the following resources:

Video:  Native Plants in the North Gateway--A Look Inside Gateway Arch National Park  (8.5 minutes)
Article: Gardening for Monarchs by Grow Native!
Curated Set of Links: Natives for Monarch Butterflies by Grow Native!
Curated Set of Monarch Resources: Milkweeds for Monarchs: The St. Louis Butterfly Project
Article (Spanish): Embellezcamos Nuestros Jardines y Protejamos las Mariposas Monarca (Danaus plexippus) Sembrando Algodoncillos.  
Webinars: Prairie & native plant webinars by Missouri Prairie Foundation

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