<p>{Family Asteraceae} Canada Goldenrod is a perennial herb with tall, leafy stems. The flowers are a striking pyramid-shaped plume of yellow which bloom from July to September. As a garden ornamental, Canada Goldenrod is adaptable to dry or moist areas. S. canadensis is a strong-growing species, which can reach 5 feet in height. All Goldenrod species attract butterflies.</p><p>Solidago is fully frost hardy and grows well in sun or shade in any fertile, well-drained soil. It will self-seed if you leave the heads to dry naturally, or the clumps can be divided in spring or fall. Site it carefully, as it is a robust growing perennial that may overwhelm smaller, slower-growing neighbours.</p><p>It comes from North America, but has become naturalised in Europe. Many people confuse Goldenrod with ragweed (Ambrosia sp.), which blooms at the same time and is responsible for causing hayfever.</p>
