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Calendula
Pot Marigold (Calendula officinalis)
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Asterales Family: Asteraceae Tribe: Calenduleae Genus: Calendula L.
Species
See text

Calendula (pot marigold) is a genus of about 12-20 species of annual or perennial herbaceous plants in the daisy family Asteraceae, native to the area from Macaronesia east through the Mediterranean region to Iran. For other plants also named 'marigold', see marigold. It is also the flower of the month October.

The name Calendula stems from the Latin kalendae, meaning first day of the month, presumably because pot marigolds are in bloom at the start of most months of the year. The common name marigold probably refers to the Virgin Mary, or its old Saxon name 'ymbglidegold', which means 'it turns with the sun'. Marigolds are hardy plants that typically bloom quickly (in under two months) in bright yellows, reds, and oranges throughout the summer and well into the fall.

Marigolds are considered by many gardening experts as one of the most versatile flowers to grow in a garden, especially since it is hardy and easy to grow. Seeds sown in the spring, in any soil, will germinate freely in sunny or half-sunny locations. They do best, however, if planted in sunny locations with rich, well-drained soil. The leaves are spirally arranged, 5-18 cm long, simple, and slightly hairy. The flower heads range from pastel yellow to deep orange, and are 3-7 cm across, with both ray florets and disc florets. They have a spicy aroma and are produced from spring to autumn in temperate climates. It is recommended to deadhead (removal of dying flower heads) the plants regularly to maintain even blossom production.

Marigolds are used as food plants by the larvae of some Lepidoptera species including Cabbage Moth, The Gothic, Large Yellow Underwing and Setaceous Hebrew Character.

The ointment of this herb is thought to cure a range of skin problems from burns to acne as it has properties that reduces inflammation, controls bleeding and soothes irritated tissue. Use internally or topically for minor wounds, eczemas and cysts as well as diaper rash and cradle cap in infants. Also, when planted near tomato plants in the garden, Marigolds help to eliminate aphids.

Marigold petals are considered edible. They are often used to add color to salads, and marigold extract is commonly added to chicken feed to produce darker egg yolks. Their aroma, however, is not sweet, and resembles the smell of hops in beer. The oil from its seed contains calendic acid.

Selected species

• Calendula arvensis – Field Marigold
• Calendula bicolor
• Calendula eckerleinii
• Calendula lanzae
• Calendula maderensis – Madeiran Marigold
• Calendula maroccana
• Calendula meuselii
• Calendula officinalis – Pot Marigold
• Calendula stellata
• Calendula suffruticosa
• Calendula tripterocarpa

• Flora Europaea: Calendula
• Germplasm Resources Information Network: Calendula
• Botanical.com: Calendula

Calendula suffruticosa

Pot Marigold (Calendula officinalis) from Thomé Flora von Deutschland, Österreich und der Schweiz 1885