With trumpet-shaped flowers that seem large for the size of the plant, these trumpet-vine relatives are from the Himalayas and western China. Plants are deep rooted and need reasonably deep soil and excellent drainage (they can take a certain amount of cold, but not cold, soggy soil). Protect from slugs and snails.Incarvillea delavayi
Grows to 2 ft. high and 1 ft. wide. Grows from a carrot-shaped perennial root and forms a rosette of foot-long leaves, each divided into many leaflets. The foot-long flower stalk is topped by 2–12 blossoms that are 3 in. long and wide, rosy purple outside, yellow and purple within. Blooms in late spring, early summer. ‘Snowtop’ has white flowers. In cold-winter regions, mulch plants after the ground has frozen (to prevent the ground from heaving).
Charming, almost legendary European species, cultivated for hundreds of years and used in developing m...
From southern Arizona and northern Mexico. Grows to 1 1/2–2 1/2 ft. tall and 1 1/2 ft. wide, wit...
Perennial. Fast-growing hybrid to 6–8 ft. tall and 3–4 ft. wide, with long, narrow leaves....