Ulmus x spp., or hybrid elms, are hybrids of native and Asian species. They are typically resistant to Dutch Elm Disease and phloem necrosis, making them a resilient choice for urban environments. It prefers full sun, and moist, well-drained soils, but will usually adapt to various types of soil and weather conditions. They also demonstrate resistance to pests such as the elm leaf beetle and leafminer. Some cultivars have poor branch attachments, making them susceptible to storm breakage at maturity.