Planting on the Petersburg Square

yellow coneflower
Orange coneflower (aka black-eyed Susan)

Two years ago, I decided to adopt the empty planting beds on our beautifully updated square. Remaining mostly bare since their installation in 2015, I envisioned the beds teaming with beautiful native plants abuzz with colorful butterflies and other beneficial insects.

Gardening with native species has long been an interest of mine, an idea that has been growing in popularity in recent years. Choosing native plants broadens the gardener’s plant palette and more importantly, provides needed food and habitat for insects and other wildlife, including our essential pollinators.

After drawing up a plan and getting approval from the Petersburg Tree Committee, work began on the west side of the square in May of 2019. Nearly 900 plugs were planted, including 20 different species of native perennial grasses and flowers. Plant species were selected for tolerance to hot, dry conditions and appropriate heights for the site. We opted to use “plugs,” young seedlings grown in cell packs, because they are economical and they establish quickly, with less transplant shock than a larger plant.

Though tiny at first, the plants grew quickly with ample rain and many bloomed in the first season. Last summer, these plants were reaching mature size and blooming beautifully.

We were able to complete the planting on the east side in 2020, adding to a few ornamental perennials that pre-dated this project. We were not so fortunate with rain this past summer, so supplemental watering was a bit more frequent. In 2021, watering should be minimal with most plants having well-established roots.

It was a lot of fun and very rewarding to observe the many interesting pollinators that visited the plants throughout the season. Many monarch caterpillars feasted on the swamp and butterfly milkweeds. Black swallowtail caterpillars were spotted on one of their host plants, golden Alexanders. Honeybees frequently visited a variety of flowers, perhaps buzzing over from the hives at Hand of Fate?

swamp milkweed and monarch larva
Swamp milkweed with monarch larva

My young daughters enjoyed counting caterpillars, looking for other interesting insects, and observing the changes throughout the growing season.

With many flowers come many seeds. Some of those seeds have been collected and will be put to good use. Look for free seed packets at local businesses, an effort organized by Menard County Trails and Greenways and Rudin Printing. All seed was collected on the square and will include packets of butterfly milkweed, swamp milkweed, purple coneflower, orange coneflower (AKA black-eyed Susan), golden Alexanders, and small yellow baptisia.

Small yellow baptisia and asclepias tuberosa

Like any garden, the planting on the square is a work in progress. I am learning which plants work well together and which plants are a bit too rambunctious for the site. There have been many good surprises and a few things that didn’t work well. Since all beds have been planted in the past two years, 2021 will be a year for editing. A few plants that aren’t a good fit will be removed. A few spots where plants didn’t make it will be filled. Thinning and weeding will continue as needed. One of the great things about many native plants is that they spread, whether by seeds or roots. Filling space means there is less room for weeds and more plants to share.

Many of the plants have been left to stand over the winter, a recommended practice that allows birds to feed on the seeds and overwintering insects to remain protected. As warmer weather rolls around, the beds will be tidied up before there is too much new growth.

This project brought together a great group of people. Many thanks to Mayor Rick Snyder and the Petersburg Tree Committee for purchasing plants, and their assistance with planting, mulching, weeding, and watering. The intern crews from Starhill Forest Arboretum put in considerable time planting and weeding. A number of Illinois Native Plant Society members took part in on-going maintenance. We were glad to have help with the initial planting from PORTA horticulture students in 2019. As we hopefully see COVID cases decline, it would be wonderful to have more student groups involved again! 

If you are interested in learning about gardening with native plants or just want to lend a hand to make our downtown more beautiful, please email me. If you’re thinking about starting your own pollinator garden, I would be glad to try to answer questions and share plants when I can. Bring on spring!

Post author, Alana McKean, an avid native plant gardener, is the curator of the woody plant collection at Starhill Forest Arboretum. Alana also serves as the Illinois Native Plant Society Central Chapter newsletter editor, and is an active member of the International Oak Society. Alana worked in her native Iowa as a Conservation Planner with the Nature Conservancy and a county conservation naturalist. She is an ISA certified arborist and a 2008 graduate of Illinois College with degrees in Biology and Environmental Science.

2 Replies to “Planting on the Petersburg Square”

    1. It’s always great working with you. Looking forward to many more pollinator projects going forward!

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