Blue pimpernel is a long-blooming annual with stunning, gentian-blue flowers. It blooms non-stop from mid summer to late fall. Blue pimpernel is short and bushy, perfect in containers or at the front of the border. It self sows in areas with long growing seasons. Hardy in zones 9-11. Grow as an annual elsewhere. Also known as Anagallis linifolia. 'Poor Man's Weather Glass'! Unique bright gentian-blue flowers, which, unlike many hardy annuals, will continue until the first frosts. Its flowers open in sunny conditions - hence its common name 'Poor Man's Weather Glass'. Easy to grow, vibrant blue summer flowers. HA - Hardy annual. height 10" Sowing Anagallis monellii Seeds: Sow indoors 6-8 weeks before the last frost date. Barely cover the seeds. Full sun.