UBI Quick Guide to Butterfly Gardens
On this page, you will find butterfly gardening tips and ways to make your outside space more butterfly friendly no matter what landscaping you have, as well as some plants we recommend for home landscapes that support butterflies and other pollinators in and around Central Illinois. Most of these plants are tough, native species that grow well in our area, but a few non-natives are listed as well.
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Note: some of these plants – especially the flowers such as purple coneflower – are often available as horticultural cultivars from garden centers. These cultivars have usually been bred for appearance rather than usefulness for butterflies, so planting the “wild” varieties from nature centers and native plant outlets is best for the environment (see our list of potential sources).
BEWARE!
Plants from large nurseries have often been treated with systemic insecticides that are incorporated into the plants and may harm the very animals you are trying to help!
Landscaping Tips
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Patches with all tall plants may look more ‘wild’ than you or your neighbors desire, so in locations where this may be an issue, use plants that are 3 feet tall or less (see Short Flowering Plants below) for most of your butterfly landscape.
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Having a border of some type – a path, line of rocks or timbers, etc. – can help make your butterfly area look ‘intentional.’ Beware of turf grass around the edges of your planted area. Most turf grass is extremely aggressive and will quickly invade your native planting, making the landscape look more “weedy,” competing with the natives and increasing maintenance.
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Using seeds is much more economical than plants. But plants grown from seed will sometimes take a year or two (or sometimes longer) to get mature enough to bloom. Most native seeds also need to overwinter in the ground (or in damp sand in the refrigerator for 1-3 months) to break dormancy. Prairie Moon Nursery is a great online resource for individual plant needs, site preparation, and planting technique.
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Try to plant some of the caterpillar host plants as well – without food for their caterpillars, there will be no beautiful adults! These plants also draw in adult female butterflies looking for a place to lay their eggs.
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Bare ground means more unwanted “weeds” and more maintenance. Include native grasses (see Grasses below) in your design to fill space between flowering plants. The best butterfly garden designs consist of integrated plant communities, not isolated plants separated by mulch. If you’re interested in reading more about this design concept, check out the books: Garden Revolution (L. Weaner & T. Christopher), Planting: a New Perspective (P. Oudolf & B. Kingsbury), and Planting in a Post-Wild World (T. Rainer & C. West).
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Most of the flowers and grasses listed do best with at least 6 hours of direct sun per day.
No matter what your yard looks like, or even if you rent or live in an apartment, you can make your outdoors more butterfly friendly without even changing your landscaping!
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Don't use pesticides/herbicides!
Butterflies are very sensitive to toxic chemicals, even those that drift over from nearby areas. Many butterflies also feed on the flowering "weeds" that often get sprayed in lawns, such as clover.
monarchjointventure.org/monarch-biology/threats/pesticides
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Mow less frequently, & leave grasses taller when you do mow
Flowers from the "weeds" in your lawn get cut off by mowing, removing a vital food source for butterflies. Also, some caterpillars feed on grasses, and the higher you cut, the more likely they are to survive the mowing.
www.butterfly-ridge.com/butterfly-basics/2018/10/17/to-mow-or-not-to-mow
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Don't bag, burn, or chop fallen leaves
Many butterflies don't migrate, but instead stay where they are and overwinter as pupa or adults. To survive the cold temperatures, they often hide in fallen leaves or rely on the layer of leaves to insulate the soil. Leave the leaves! xerces.org/blog/leave-the-leaves
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Leave outdoor lights off at night
Artificial light at night messes with the internal clocks of monarchs and disrupts their navigational abilities. It also interferes with the normal mating behaviors of many moths, including the gorgeous luna moth!
www.uc.edu/news/articles/2022/05/lights-can-interfere-with-monarch-butterflys-navigation-abilities.html
"Do the best you can until you know better. Then when you know better, do better." - Maya Angelou
Did you know?
Recommended Butterfly Plants for Central Illinois and the surrounding areas
Click on a plant name for more info!
= provides a nectar source for butterflies
= host plant for specific butterfly caterpillars
Short Flowering Plants (<3 feet)
Rue - not native (Ruta graveolens)
Black Swallowtail, Giant Swallowtail host plant
Grasses (<3 feet)
Little bluestem (Schizachyrium scoparium)s
host plant for some Skippers
Taller Flowering Plants (>3 feet)
Shrubs (6-12 feet)
Spicebush Swallowtail host plant
Wafer ash/Hop tree (Ptelea trifoliata)
Giant Swallowtail host plant
Trees & vines
Hackberry (50') (Celtis occidentalis)
Host plant for American Snout, Hackberry Emperor, Question Mark, Tawny Emperor
Pawpaw (15') (Asimina triloba)
Zebra Swallowtail host plant
Tulip tree (60-90') (Liriodendron tulipifera)
Eastern Tiger Swallowtail host plant
Wooly pipevine (vine to 30') (Aristolochia tomentosa)
Pipevine Swallowtail host plant
