patula essential oil has the ability to be used as residual pesticide against bedbugs. Medicinally, many cultures use infusions from dried leaves or florets. Hundreds of cultivars have been developed, of which the following have gained the Royal Horticultural Society's Award of Garden Merit:. They are grown by gardeners in moderately fertile, but well-drained soil in full sun with evenly moist conditions. Tagetes patula is frost intolerant, given a Royal Horticultural Society hardiness rating of H2, capable of surviving temperatures of 1–5 ☌ (34–41 ☏) but killed by freezing temperatures. (They also found the same for another purported repellent, Armoracia rusticana.) patula but instead found it acting as an attractant, resulting in greater infestation and lower yields. Moreau et al 2006 attempted to protect Solanum tuberosum against Leptinotarsa decemlineata by intercropping with T. Its root secretions are believed to kill nematodes in the soil and it is said to repel harmful insects, such as white flies on tomatoes. The plant is used in companion planting for many vegetable crops. It is therefore more suitable as an edging plant in the open border. It is shorter, and has a more spreading habit, than its relative the Mexican marigold ( Tagetes erecta). This plant is valued for its velvet-textured, brightly coloured blooms in shades of yellow, orange and brown in summer. įrench marigold Tagetes patula, possibly a hybrid cultivar. It can grow in both sandy and clay soils provided they have good drainage. The leaves of all species of marigold include oil glands. The heads contain mostly hermaphrodite (having both male and female organs) florets and are pollinated primarily by beetles in the wild, as well as by tachinid flies and other insects. Achenes ripen and are shed within two weeks of the start of bloom. In its native habitat of the highlands of central Mexico, blooms are produced from September to killing frost. In some climates it flowers from July to October. Tagetes patula is an annual, occasionally reaching 0.5 m (1.6 ft) tall by 0.3 m (1.0 ft) wide. The Latin specific epithet patula means “with a spreading habit”. Some authorities regard Tagetes patula as a synonym of Tagetes erecta, the Mexican marigold. It is widely cultivated as an easily grown bedding plant, with thousands of different cultivars in brilliant shades of yellow and orange. Tagetes patula, the French marigold, is a species of flowering plant in the family Asteraceae, native to Mexico and Guatemala with several naturalised populations in many other countries.
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