Papaver dubium × rhoeas, commonly known as Long-headed Poppy or Flanders Poppy, is a hybrid annual herb that is a cross between Papaver dubium, the long-headed poppy, and Papaver rhoeas, the common poppy. It is characterized by a rapid growth rate and typically reaches a height of 1.5-2.5 feet (0.46-0.8 meters) with a spread of 1-1.5 feet (0.3-0.5 meters). The plant features vibrant red, showy flowers that bloom profusely in the spring and summer, adding a splash of color to garden settings. The foliage is a bluish-green, providing a striking contrast to the flowers.

The Long-headed Poppy is valued for its ease of maintenance and the bright pop of color it brings to gardens. It is often used in wildflower mixes, meadow plantings, and as a border plant. It thrives in full sun and is adaptable to a variety of soil types, including clay, loam, and sandy soils, provided they have medium to fast drainage. It requires low amounts of water, making it suitable for drought-tolerant gardens. While it is not known for any significant problems, it can be susceptible to fungal diseases in wet conditions. It is also important to note that all parts of the plant are toxic if ingested.CC BY-SA 4.0