(Dill) Anethum graveolens is the botanical name for the well-known herb, Dill. This half hardy, cool weather annual is a native to southwest Asia, but is now widely naturalized in North America. Dill blooms and sets seeds when nights are short and days are warm. The delicate, feathery plants are blue green and grow from 3 to 5 feet tall. They ... Found on http://www.encyclo.co.uk/local/10004