Alkaline Soil

An annual herb, 15-30 cm (6-12 in) tall, with trailing stems, small, finely divided grey-green leaves and racemes of tubular,...

A graceful aromatic perennial, up to 2 m (6 ft.) tall, with erect, hollow stems and mid-green, feathery foliage the...

A herbaceous perennial, on a stout rootstock, 1-1.2 m (3-4 ft.) tall, with irregularly pinnate, inversely lance-shaped leaves and dense...

An annual semi-parasitic herb, 5-30 cm (2-12 in) in height, it attaches itself to the roots and stems of grasses,...

A handsome hardy perennial which grows to at least 2.1 m (7 ft.) tall, with purplish stems, whorls of slender,...

A woody-based, hardy perennial, up to 1.2 m (4 ft.) tall, leaves are opposite and mostly subdivided into 3-5 leaflets....

A hardy annual up to 60 cm (2 ft.) tall, with finely divided, feathery leaves. A mass of shallow-cupped flowers...

A relic from prehistory, closely related to the vegetation which decayed to form modern coal seams, it is a perennial,...

A bushy, bristly biennial, 60-90 cm (2-3 ft.) tall, with narrow lance-shaped leaves, spotted, hairy stems and dense spires of...

A clump-forming, aromatic perennial, 40-90 cm (16-36 in) tall, with pinnate leaves, made up of lance-shaped leaflets, and tall racemes...