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The tree grows well in [https://en.wikipedia.org/wiki/Ferrallitisation ferralitic] tropical soil and usually gets between 10 and 12 metres but can get as tall as 20 metres.
The plant flowers for the first time after 8-10 years and the trees are fully flowering at around 20 years. Cloves are the nail-like spikes which are unopened flower-buds. The name derives from the Latin word ''clavus'', meaning nail. in Branches of clustered flower-buds are removed from the stems, then handpicked and sun-dried. Clove harvesting in Madagascar takes place between October and JanuaryMarch.<!-- fact-check-->
Clove is have a variety of culinary and non-culinary uses. As a spice, cloves are used in curries, spicy fruit cakes, sauerkraut and a wide range of cuisines as well as beverages, such as red wine.
Cloves are is widely used as a base in perfumes, for example in ''l'Air du Temps'' by Nina Ricci and ''Opium'' by Yves Sain-Laurent.
Clove's main ingriedient, euganol, is a bioactive compound with anti-bacterial, fungicide, anticeptic, antioixidant, anaesthetic and , analgesic , anti-inflammatory effects. It is furthermore used in aromatherapy, pharmacyand various traditional, human and veterinary medicine including dentistry, toothpaste... Euganol can however be toxic in relatively small doses. A dose of 5-10ml has been reported to be nearly fatal for a two year old. Additionally, clove oil can be used as an ant and mosquito repellent.
Clove is classified in three categories depending on harvesting and intended use: CGI - "Hand pick", CG2 - "Prima", CG3 - "Courant" (ordinary), which applies to non-food use, such as the Indonsian ''kretek'' industry.
When exported, cloves in the Prima category should have less than 16% moisture level and weight at least 70mg. The right moisture level at the time of export is an important measure to ensure minimun weight loss while the spice is on a shop shelf or kitchen cupboard without loosing its spicy properties. A well prepared and packaged clove consignement should remain in good condition for at least two years.
Cloves from Madagascar are smaller than cloves from Sri-Lanka for example, but Madagascar's cloves are much stronger in flavour, making the Malagasy variety more suited for cooking, while Sri-Lankan cloves can be better for making decorative pomanders.
== Additional information ==