Soil Types in Missouri

Missouri has 961 zip codes in our database. The most common soil type is Loam, found in 0% of the state. Understanding your local soil type helps you choose the right plants and amendments for your garden.

Missouri spans USDA hardiness zones 5b through 8a. Your hardiness zone determines which perennial plants will survive winter in your area. Enter your zip code above to find your exact zone and get personalized planting recommendations.

Missouri sits at the geographic crossroads of America, and its soils reflect influences from every direction. Northern Missouri's glaciated prairie has deep, dark soils similar to Iowa. The Ozark Plateau in the south features thin, rocky, acidic soils over limestone and dolomite. The Bootheel in the far southeast is Mississippi Delta country — flat, alluvial, and enormously productive. The Missouri River corridor contains rich bottomland soils deposited over millennia. Menfro silt loam, the state soil, formed in loess along the Mississippi and Missouri River bluffs and represents the state's most widespread productive soil. The Ozarks' karst limestone creates unique conditions: sinkholes, caves, springs, and soils that range from deep and fertile in the valleys to almost nonexistent on the rocky hilltops.

Missouri's growing season ranges from about 175 days in the north to 210 days in the Bootheel. Kansas City and St. Louis both average about 195 frost-free days, with the last spring frost near April 5-10 and first fall frost around October 20. Springfield in the Ozarks has about 190 days. The Bootheel near Sikeston enjoys 210 days. Northern Missouri near Kirksville has the shortest season at 175 days. Missouri's central continental location makes it prone to dramatic weather swings — 70°F days in February followed by 20°F nights a week later. This makes spring planting timing a gamble. Experienced Missouri gardeners watch soil temperature more than calendar dates.

Missouri's diverse soils support equally diverse agriculture. The northern prairie grows corn and soybeans. The Bootheel produces rice, cotton, and watermelons. The Ozarks support cattle ranching and orchards. For home gardens, Missouri's warm summers and adequate rainfall favor tomatoes, peppers, sweet corn, green beans, squash, cucumbers, and melons statewide. The Ozark highlands produce excellent grapes — Missouri has one of the oldest wine industries in the country, dating to the 1830s. Blueberries grow in the naturally acidic Ozark soils. Peach orchards thrive in central Missouri. Pawpaws grow wild in the state's forests and are increasingly cultivated. Missouri's native persimmon trees produce small, intensely flavored fruit after the first frost.

The University of Missouri Soil and Plant Testing Laboratory provides soil analysis for about $15 per sample through extension offices. Missouri soils span a wide pH range: northern prairie soils are often near neutral, while Ozark soils can be quite acidic (pH 5.0-5.5). The clay soils along the Missouri and Mississippi Rivers expand and shrink seasonally, creating heaving that affects foundations, roads, and garden beds. Adding organic matter moderates this behavior. The Ozarks' rocky soils are best gardened in raised beds or in the deeper valley soils. Old lead mining areas in the southeastern Ozarks (the Lead Belt) may have elevated soil lead levels — testing is essential before growing edibles in this region.