200 seeds. Hesperis matronalis. Perennial in zones 3-9. 
 
Known as White Sweet Rocket, Dame's Rocket and Hesperis matronalis var. albiflora.
 
Height 4 feet. Spacing 12 inches.
 
Sowing Hesperis matronalis Seeds:
 
Sow hesperis seeds outdoors after the last frost date. Or start indoors 6 to 8 weeks early. Barely cover the seeds with soil. Full sun to part shade.
 
Grown by Megan's Heirloom Seeds.
 
Learn more about hesperis here.