Answer: Erysimum, commonly called wallflower, is a perennial but is often grown as an annual. The zones vary by species. In your growing region, Erysimum x allionii (Siberian wallflower) will perform reliably as a perennial. Provide full sunshine and regular water during the growing season. Erysimum cheiri (English wallflower) is marginal in your region and should be considered an annual only. Erysimum kotschyanum is a perennial in your zone. Again, it likes exposure to full sunshine, average soil, and regular water during the growing season.
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