Nemesia is a genus that includes some species of annual and perennial plants, originating in Africa and southern Europe; generally they are all grown as annuals, there are also many intergeneric hybrids on the market. They have a paneling or hanging shape, and are characterized by delicate vegetation, with herbaceous stems, very branched; the leaves are light green, elongated. From April-May, until autumn, they produce a myriad of brightly colored small flowers; the upper part of the corolla is three-lobed, the lower one is bilobed or often with a wrinkled or notched appearance; the colors are the most varied, from pure white to blue, from pink to red, often with a central eye in contrasting shades; there are many hybrids, even two-colored. The flowers of nemesia strumosa bloom in profusion, and emit a delicate scent. These plants can be grown in borders, but also in pots or hanging baskets; the removal of the withered flowers promotes flowering.
Nemesia strumosa plants are grown in a sunny or partially shaded place, especially in regions with very hot summers. In areas with harsh winters they must be placed in a sufficiently sheltered place because they cannot withstand temperatures close to zero. Even perennial species slightly fear the cold, especially when temperatures drop below freezing, it is therefore advisable to grow them as annuals, or shelter them in a cold greenhouse during the winter. In this way it is possible to keep them for the following year and ensure their proper development.