Giant hyssop, also known as Agastache, is a type of perennial herb native to North America and consists of around 30 species. Hybrid Agastache plants tend to have more vibrant flowers and are more resilient in winter than their wild counterparts. These hybrid flowers come in various colors, such as red, orange, pink, yellow, and white. They typically bloom from mid-summer to fall in dense clusters at the top of sturdy square stems, accompanied by fragrant leaves. These flowers attract bees, hummingbirds, and butterflies.
One specific hybrid, 'Apricot Sunrise,' produces apricot-orange flowers from late June to September (sometimes until frost). This hybrid results from a cross between A. coccinea and A. aurantiaca, both native to the southwestern U.S. 'Apricot Sunrise' typically grows to 2-3 feet tall, and its leaves can be used to flavor cold drinks and teas.
Agastache plants require well-drained soil with average to medium moisture for optimal growth, preferably in full sun. While they can tolerate some light shade, good soil drainage is crucial. It's important to note that clay soil may lead to poor performance and potential winter survival issues. Once established, these plants can withstand dry soils and heat. Additionally, deadheading spent flowers promotes further blooms. Agastache hybrids are generally winter hardy to USDA Zone 6, and it's advisable to keep them in protected areas, such as southern exposures, with leaves and flower stems left over winter for added protection. Using sandy or gravelly mulch can help safeguard the plants and prevent rot.
