Silent auctions for botanical gardens, set up in minutes

Your collection reproduces, which changes everything

A museum cannot sell a painting to fund the roof. A zoo cannot auction an animal. A historical society cannot deaccession into its own gala. All three share the same rule, and a garden is the exception — because a cutting from an accessioned plant is not the accessioned plant.

• Propagated material — cuttings, divisions, seedlings, seed — can be sold without affecting the collection
• The parent plant stays accessioned, recorded and in the ground
• A plant with provenance, propagated by the garden's own horticulturists, is something no nursery can sell
• Rare, unusual and hard-to-source species are the most sought-after lots in a gardening audience

This is the strongest catalogue advantage in the whole architecture, and most gardens use it only at the plant sale — where it is priced flat and sold to whoever arrives first, rather than bid on by the people who want it most.

But the collection itself still is not the catalogue

The rule that survives the inversion. An accessioned plant, a specimen tree, a herbarium sheet or anything in a seed bank is not an auction item, and the curator decides what may be propagated and distributed rather than the development office.

Several further constraints have no equivalent in any other silo:

• Plant patents and trade designations. Propagating and selling a patented cultivar without a licence is an infringement, and gardens hold plenty of them
• Collection and seed-bank agreements. Material received under an agreement frequently carries restrictions on distribution, including to the public
• Invasive species. A garden distributing something that becomes a problem locally has done real damage and will be blamed correctly
• Phytosanitary rules. Moving live plants and soil across state lines is regulated, which matters for any online auction with distant bidders
• Conservation collections. Threatened and protected species carry their own restrictions

One conversation with the curator settles all of it, and it has to happen before anything is listed rather than after somebody has bid.

Do not compete with your own plant sale

The plant sale is the sector's established fundraiser. It is large, it has a volunteer army, members plan their year around it, and it uses the same greenhouse space, the same horticulturists and the same audience an auction would.

So the auction pairs with it or sits well away from it, and it sells what the sale cannot — the single rare specimen, the expertise, the access: the plant sale.

Your horticulturists are the other asset

A garden employs people who can diagnose a sick tree, design a border, prune an espalier, identify anything and tell somebody why their hydrangea is the wrong colour. In a county full of keen gardeners that expertise has no comparable supplier.

A garden visit to somebody's own garden is the item to build: it costs an afternoon, it sells to people who have never given the garden anything, and it converts them into members.

Working it out from gardeners

A garden knows its members exactly and usually has a much larger list it never captured.

• Members, who renew reliably and are genuinely interested in plants
• Plant sale customers — who have just spent money on plants, and mostly not on any list
• Plant societies and garden clubs in reach

The full method: how much can a garden raise?

When an auction is the wrong instrument

In plant sale season, when the greenhouse, the volunteers and the members are all committed. If the need is a glasshouse, a collection building or a restoration, that is capital. And if the curator has not signed off on what may be propagated and distributed, nothing gets listed.

Reaching gardeners

Channel order: members, who are numerous and renew reliably; plant sale customers, who are a far larger list than the membership and mostly not on it; class and workshop participants; plant societies and garden clubs, which are organized and local; master gardener programmes; nurseries' own customers, where they will share; and local media, which runs garden photographs gratefully.

One move worth building in: plant sale customers. A garden's sale takes thousands of transactions from people who have just spent money on plants, and most gardens capture none of their details. A sign-up at the till, once, changes the organization's list permanently.

General mechanics: how to promote a silent auction and marketing templates.

Living things do not last forever

The constraint on every naming and memorial item a garden sells, and the one that produces the most distress when it is skipped. A tree dies. A border is redesigned. A bench weathers out.

Say the term plainly before somebody buys, particularly on memorial items: benches and naming rights.

If your collection does not reproduce

A museum, historical society or gallery holds objects that cannot be replaced or propagated, and the collection rule there is absolute: silent auctions for museums.

General information, not legal advice for your garden. Plant patent and trademark rules, phytosanitary requirements, invasive species regulation and any collection or seed-bank agreements you hold are all specific — your curator and counsel decide how any of this applies.

A season, because plants are grown rather than requisitioned

• A season ahead — curator sign-off on what may be propagated and distributed, then propagation started for anything that needs growing on. A cutting taken in July is a plant in October
• Week 10 — horticulturists agree how many consultations, classes and visits they will do; that total is a cap
• Week 8 — nurseries, growers, plant societies
• Week 6 — members, volunteers, garden-adjacent businesses
• Week 4 — botanical artists and photographers, general community
• Week 2 — catalogue closed; every plant lot carries size, hardiness, conditions, care, collection arrangements and any shipping restriction
• Close + 2 weeks — the planting funded, photographed before and after

Avoid plant sale season entirely, for soliciting and for running. Autumn and winter are when the glasshouse is quieter and the staff have capacity.

Three jobs, and the first is the curator

• Curator sign-off — patents, collection and seed-bank agreements, invasive risk, conservation status, phytosanitary limits. Bring a list of twenty proposed lots, not a general question
• Propagation lead time — one person makes sure anything needing a season was started a season ago
• Dedication register — who dedicated what, the wording, the term, the location and the replacement policy, kept where it survives staff turnover

Where garden auctions go wrong

• Propagating and selling a patented cultivar without a licence
• Distributing something invasive locally, for which a garden will be blamed correctly
• Shipping live plants across state lines without checking phytosanitary requirements — a real constraint on any online auction
• Building a rival to the plant sale in the same fortnight, with the same volunteers and the same members
• Taking the sale's best stock without asking the propagation volunteers who grew it
• Promising a permanent memorial tree, when a tree can fail in its first three years
• Bidding memorial dedications up competitively instead of offering them at set prices

What it costs, and the advantage nobody else has

Materials and staff mornings. The binding constraint is propagation lead time rather than money.

Worth putting to a board plainly: every other collecting institution is barred from selling anything derived from its collection. A garden is not, because its collection reproduces — and a plant with recorded provenance, propagated by the garden's own horticulturists, is something no nursery in the country can offer. Most gardens use that advantage only at a flat-price plant sale, where the rarest specimen goes to whoever queued first.

After it closes

• Photograph the funded planting before and after; nothing else reports as clearly
• Record every propagated lot's provenance in the accession notes, so the record survives
• Capture plant sale customers permanently — a sign-up at the till changes every future campaign
• Keep the dedication register somewhere it outlives the person holding it
• Tell the propagation volunteers what their rare specimens raised