Verbascum Yarrow Click here for a printer friendly version of this page. Marjoram is a highly perfumed herb with thick trusses of dainty white or purple flowers which make it a highly decorative herb that is suitable for the flower garden. In warmer climates it is a perennial, but it is treated as a half-hardy annual in colder areas since it will not survive a severe winter. Plants grow to 1-2 feet with a spread of about 8 inches.
Flowers are tiny but plentiful and grow in clusters around the stem.
Cultivation Plants may be grown from seed or started from summer cuttings. Roots may be divided in the fall. When grown from seed, it should be started indoors or in cold frames in early spring. Transfer outside when temperatures aren't expected to drop below 45 degrees. To keep the plants neat, cut out all dead wood and remove dead flowers and stalks.