Crataegus monogyna, or one-seeded hawthorn, is not recommended to plant, due to its invasive tendencies. Native to Europe and Asia, it aggressively spreads by seed, forming dense, thorny thickets in woodlands and fields. It prefers well-drained soils, but is tolerant of a wide variety of soil conditions and nutrition levels, however, it will not tolerate wet or waterlogged soils. While it faces few pests, it is susceptible to fire blight and should be avoided near orchards. Its seeds are dispersed by birds, further contributing to the suppression of native vegetation. This species is expected to continue spreading across North America, and its introduction should be prevented. Additionally, it can be moderately messy with falling fruits, leaves, and spring flowers. Consider planting thornless cockspur hawthorns (Crataegus crus-galli var. inermis) or other Crataegus species as an alternative.