Horticulture
Field curators responsible for the day-to-day tending of all 14 themed valleys. Every pruning, re-potting, and irrigation change is logged against the plant's accession number and reviewed monthly. Lead: Head of Horticulture.
Yuh Siang Garden · Bukit Timah · Est. 1972
Stewardship, conservation and the Lim family journal since 1972.
A monograph on the three-generation curatorship of a 14-hectare living archive — the herbarium, the people, and the conservation partnerships that keep 4,217 catalogued species under continuous record.
Plate I — The Penjing Terrace, Penjing Valley. Catalogued 1984.
Chapter One · The Stewardship Lineage
Three generations of one family, one curatorial vow.
A continuous record of who tended what, and why — preserved in field notebooks, accession ledgers, and 152 issues of the Yuh Siang Quarterly.
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Dr. Lim Yuh Siang
Founder · Botanist · First Curator-in-Chief
A Cambridge-trained botanist who acquired the disused nutmeg estate in the Bukit Timah foothills in 1972 and began the first accession ledger on 14 March of that year. Dr. Lim established the Penjing Terrace, the Vanda Miss Joaquim heritage bed, and the discipline of recording every planting against a numbered grid that the Garden still uses.
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Dr. Lim Mei-Hua & Lim Chong Boon
Second-generation Stewards · Curators of the Herbarium & Seed Exchange
The founding couple's two elder children opened the seed exchange to international botanists in 1989 and secured Kew accreditation for the on-site herbarium laboratory in 1996 — one of four such facilities in Southeast Asia. They also formalised the quarterly index that has now run without interruption for 152 issues.
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Lim Jia-Wen
Third-generation Curator-in-Chief · Chair, Yuh Siang Garden Heritage Trust
A Kew-affiliated conservation geneticist, Lim Jia-Wen returned from the Royal Botanic Gardens in 2011 to lead the 38-person permanent curatorial team. Under her tenure the Garden has expanded IUCN recovery partnerships from 9 to 17 and was awarded Asia-Pacific Garden of the Year by the International Botanical Congress in 2019 and again in 2023.
Chapter Two · The Permanent Curatorship
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The 38 people who keep the Living Index honest.
A permanent curatorial team structured around four disciplines — each with its own accession ledger, review cadence, and public reporting line. No contract horticulture, no seasonal turnover.
Herbarium
Voucher-specimen preparation, dry-mount archiving, and accession cross-referencing for the Kew-accredited laboratory. Lead: Senior Herbarium Curator.
Conservation
Field liaison for the 17 IUCN Red List species recovery partnerships; seed banking and reintroduction protocol design. Lead: Conservation Programme Director.
Seed Exchange & Publications
Coordination of the open-access seed exchange shipping to 41 countries across 6,800 registered institutional members, and editorial production of the Yuh Siang Quarterly. Lead: Editor of the Quarterly.
Chapter Three · Stewardship Extended Outward
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17 IUCN recovery programmes, a Kew-accredited lab, and an open-access seed exchange reaching 41 countries.
The Garden's curatorial work does not stop at the Bukit Timah boundary wall. Three institutional programmes extend the same continuous-record discipline outward — to threatened species, to peer institutions, and to the international botanical research community.
IUCN Red List recovery programmes
Active since 2008. Includes ex-situ banking, propagation protocol development, and reintroduction trials for species across Peninsular Malaysia, Borneo, and the Philippines. Quarterly progress reports published in the Journal.
Kew-accredited herbarium laboratory
One of four in Southeast Asia, accredited by the Royal Botanic Gardens, Kew. Holds 38,000+ pressed specimens, including type material for 14 Asian species described by Garden staff since 1986.
Countries served by the Seed Exchange
Open-access by application. 6,800+ registered institutional members as of 2024. Indexed availability lists published three times per year; institutional correspondence preserved in the Trust archive.
Conservation partnership programme founded
Formalised under a Trust charter amendment. Now operates under MoU with the Singapore National Parks Board, Forest Research Institute Malaysia, and three ASEAN-region botanic gardens.
Chapter Four · The Continuous Record
The Yuh Siang Quarterly: 152 issues, indexed continuously since 1986.
Every accession, every staff departure, every published correction — recorded in a single bound serial that has appeared without interruption since Volume 1, Issue 1 in March 1986. The full back-catalogue is open to researchers and press on written request to the curatorial desk.
- Vol. 1, No. 1 — March 1986
- Founding issue. Editorial statement of the quarterly index and the first published accession list of the Penjing Valley.
- Vol. 14, No. 2 — June 1999
- First publication of the Seed Exchange Index, predating the formal 2002 international opening by three years.
- Vol. 28, No. 4 — December 2013
- Commemorative issue on the founding of the Lim Yuh Siang Archive. Includes the complete 1972–1994 accession ledger in facsimile.
- Vol. 39, No. 1 — March 2024
- Latest issue. Documents the 4,217-species milestone, the 2023 Garden of the Year award, and the 41st country added to the Seed Exchange.
“Membership is not a ticket. It is a covenant with the next generation of curators — the line of work that keeps a living archive alive past any single lifetime.”
Annual membership funds the 38-person curatorial team, the Kew-accredited herbarium, and the open-access seed exchange.
Become an Annual Member