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BEYOND THE
 CJBG
Plants and theater
 Plants and theater
 The CJBG's Versailles
 planters move to the
 Théâtre de l'Orangerie
 July 2- September 27
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Post Facebook THE GARDEN'S  SECRETS
Amazing new blooms to discover in the Rockeries
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NEWS
Radio Cité
 Radio Cité - Podcast
 End of confinement and
 presentation of the
 exhibition "The rise of
 invasive neophytes",  with director, Pierre-
 André Loizeau
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Radio Lac
 Radio Lac - Podcast
 Introduction to the CJBG
 and to some invasive
 species, with director
 Pierre-André Loizeau
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Cult.ge
 Cult.ge
 Presentation of the
 exhibition "The rise of
 invasive neophytes",  with director, Pierre-
 André Loizeau
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Plan Biodiversité 2020-2023
 The 2020-2023 Biodi-
 versity Plan approuved
 by the State Council.
 The CJBG greatly
 contributed to the
 objectives' definition
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Tribune de Genève 06.06.2020
 La Tribune de Genève
 Learn more about
 invasive exotic plants
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Agro-environmental networks
 Genève Grandeur
 Nature
 Agro-environmental
 networks
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THE HESPERIDES'
 TREASURE
Symboles & Sentiments
Interactive & multimedia
 fiction !

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100% Organic
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Acquisition policy for the Living Collections 2019
Acquisition policy for the Living Collections 2019
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Politique de gestion des collections vivantes
Living collections management policy 2018
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Index Seminum 2020
Index Seminum 2020
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Catalogue des collections vivantes
Living collections index
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ombrage

Conservatoire et Jardin botaniques de la Ville de Genève


Welcome → Botanical Garden → The Management
Maintenance of the Living Collection
impression
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Maintenance of the Living Collection

Who works there
Maintenance of the green spaces
Maintenance of the living collection

Formation of a gardener-botanist

The maintenance of the collections of living plants requires specific training that is complementary to the basic training of a horticulturist. One needs 2 to 3 years for a good horticulturist to become fully at ease with the maintenance of the collections.

Effectively, working on living collections requires motivation and a particular knowledge of plants. Each plant is different from its neighbour. Our plants generally come from natural habitats, and there rarely exist "fiches de culture" for wild plants.

The gardener-botanist has to know about the natural habitats of plants. This is usually somewhat straightforward for indigenous species (the excursions for the collection of seeds for the Index Seminum are of great value in refining ones knowledge on different habitats), but can be less evident for tropical species where one must seek out information in published articles and books, often written in English. In some cases, one may need to contact the curator who brought back plants from an expedition.

Seed collection

Collection of seeds for the Index Seminum or for the maintenance of the collections, particularly when it concerns collections of phanerophytic plants (annuals or bi-annuals), is an integral part of the work of a gardener-botanist.

The living collections

The flowering stage is indispensable for the identification of a plant. Determinations can be made using a flora, or with the help of a curator who is a general botanist or a specialist in a type of flora, a family or a group of plants (cactuses, ferns, palm trees, etc.). The value of a collection depends on the number of identified plants in it.

A botanical collection is characterized by the proximity of numerous species in small numbers (a few examples, either in pots, under glass or planted outside in the soil or flower beds). A species is thus represented by just a few plants. Each plant has to be taken into consideration, not just as a group (as is the case in traditional horticulture), but plant by plant. Culturing procedures are closer to the horticulture practised in the beginning of the 20th century, prior to the start of mechanisation.

A tight collaboration within the Institute

One of the particular roles of the gardener-botanist consists of collaborating closely with the curators, and thus providing them with precise information on the species on which they are working. They must take notes, be capable of synthesising information and be able to communicate this to others. The mastering of computer systems is becoming indispensable, on the one hand to distribute information, and on the other to assure the management of databases. As seeds and plants are received, they are registered and labelled. All of the culturing procedures are subsequently noted. Each plant is indexed and all information on it is recorded.

Reconstitution of biotypes

In collections under glass (greenhouse collections), a perfect knowledge of climate management is critical. Watering, humidity, aeration, shade must all be mastered. Their original climates, often tropical, have to be understood in order to water the plants correctly. Watering remains a long and difficult apprenticeship for the maintenance and development of plants in greenhouses.