Sweet rocket (Hesperis matronalis) HESS-per-iss mah-tron-AL-iss Genus:  Hesperis This plant is a biennial or short-lived perennial with leafy stems and 4- to 8-inch-long toothed, hairy leaves. Lilac or purple, sometimes white, flowers are borne from late spring to midsummer in racemes or panicles. Noteworthy Characteristics:  Considered invasive in grassland sites and forests. Attractive to insects. Flowering diminishes with age. Care:  Grow in moist but well-drained, fertile, neutral to alkaline soil. Propagation:  From seed sown in situ. Root basal cuttings in spring. Problems:  Viruses, mildew, slugs, snails, flea beetles, caterpillars.

Overview

Height 1 ft. to 3 ft. Spread 1 ft. to 3 ft. Growth Habit Spreads Growth Pace Invasive/Aggressive Grower Light Full Sun to Part Shade Moisture Dry to Medium Bloom Time Spring, Summer Flower Color Purple, White Uses Beds and Borders Style Meadow Garden, Rock Garden Seasonal Interest Spring Interest Type Perennials