Map Seed Collection Sites with Free Online Tools

A reliable seed map turns scattered observations into a practical conservation plan. It shows where healthy parent trees grow, which sites are accessible, when seeds may mature, and how volunteers can return to the same locations without disturbing sensitive habitat. Free online mapping tools are sufficient for most community projects, provided the information is organised consistently.

The method is useful for Australian Landcare groups, schools, councils and workplace volunteers, as well as people learning from Growing Native’s work in the Potomac River watershed. Australian conditions require local judgement: eucalyptus, wattle, banksia, casuarina and melaleuca species have different fruiting patterns, while public access and seed collection rules vary between states and land managers.

Choose a Simple Mapping Stack

You do not need specialist geographic information system software to begin. A shared map, a spreadsheet and a phone with location services enabled can create a workable record. The best setup is the one volunteers will actually update after each visit.

Tool	Best use	Useful strengths	Main limitation
Google My Maps	Shared collection-site map	Easy layers, symbols, notes and collaboration	Requires a Google account for editing
Google Earth	Landscape context and satellite review	Clear imagery, terrain and historical views	Less convenient for structured field records
uMap with OpenStreetMap	Public-facing community map	Custom symbols, open mapping data and sharing controls	Slightly steeper learning curve
Google Sheets	Detailed site register	Filters, dates, contacts and harvest records	Does not replace a visual map
Phone mapping app	Field verification	GPS points, photographs and offline notes	Accuracy and offline features vary

Start with one master map rather than separate files for every volunteer. Create layers for candidate sites, confirmed parent trees, access points, no-collection areas and completed visits. Use a consistent colour system, such as green for verified trees, yellow for sites needing inspection and red for restricted or unsuitable areas.

A spreadsheet should sit beside the map. Give every point a unique code such as “CAN-014” or “MEL-027”, then use that code in photographs, field notes and collection bags. This prevents confusion when several trees of the same species grow beside a creek or in a large reserve.

Define What Makes a Site Suitable

Mapping should begin with a clear site-selection standard. A visually impressive tree is not automatically a good seed source. Look for healthy, mature specimens that appear suited to the local climate and soil, show no obvious disease, and grow in a landscape where collecting will not damage habitat or reduce food for wildlife.

For Australian projects, record the species using both its common and scientific name where possible. “River red gum” is more useful as Eucalyptus camaldulensis, because common names can differ between regions. Also note whether the tree appears naturally established, planted in a streetscape, part of a restoration planting or located in a private garden.

Prioritise genetic diversity by identifying several parent trees rather than collecting everything from one large specimen. A creek corridor in Canberra, a remnant woodland near Melbourne or a stormwater reserve in Brisbane may contain different local forms of the same species. Mapping those differences helps a nursery or restoration coordinator decide where seed should be kept separate.

Site Details Worth Recording

• Species, approximate age, health and flowering or fruiting condition
• GPS location, reserve name, nearest street and a useful access description
• Land tenure, managing authority and whether permission is required
• Number of suitable parent trees within the area
• Ground conditions, weeds, erosion, flooding risk and nearby disturbance

Include a “do not collect” category for threatened species, isolated trees with very limited regeneration, wildlife habitat, culturally sensitive places and areas where permission is unclear. A transparent exclusion layer helps new volunteers make safe decisions without relying on informal instructions.

Build the Map Before Visiting

Begin with satellite imagery and publicly available property or reserve information. Search for creek lines, remnant vegetation, parklands, school grounds, botanic gardens and council restoration corridors. In Australian cities, the most promising sites are often close to everyday travel routes: a bike path beside a Melbourne creek, a suburban reserve in Sydney or a community garden on the edge of Adelaide.

Use map pins for approximate candidates, not claims of confirmed seed availability. Satellite images can show tree cover but rarely identify species accurately. A canopy that looks like a suitable woodland may be an ornamental planting, a weed infestation or a location that is inaccessible during wet weather.

A useful map description should state why the place was selected. For example: “Several mature casuarinas beside a fenced creek, public path, inspect in late summer.” This is more valuable than a bare point because it gives the next volunteer a decision to test.

Local organisations can expand the search. Council environment officers, Landcare networks, schools and native plant nurseries may know where remnant trees survive. An arboretum can also provide expert contacts and a suitable meeting point; guidance on how to partner with a local arboretum can help turn a map into a supervised community event.

When using Google My Maps, create a naming convention before sharing the file. A title such as “MEL-027 | River red gum | inspect February” makes filtering easier than “big tree near creek”. Add a short note about the last visit and link photographs from a shared folder if the group needs a visual reference.

Verify Locations Safely in the Field

The first field visit is for verification, not necessarily collection. Compare the pin with the actual tree, check the species, inspect its health and confirm that volunteers can approach without trampling regeneration or entering dangerous terrain. Move the marker if the original satellite position was approximate.

Take photographs from several angles: the whole tree, bark, leaves, fruit or seed capsules, and the surrounding site. A north-facing or consistent orientation is helpful but not essential. Photograph a nearby sign, gate or trail junction so another volunteer can find the tree without relying solely on GPS.

GPS accuracy can vary under dense canopy, beside tall buildings and near steep gullies. Record the point while standing close to the trunk, then write a plain-language description such as “third mature tree upstream from the footbridge”. Save an offline copy before leaving, especially in rural areas where mobile coverage is unreliable.

Collection must follow the rules of the land manager. National parks, state forests, council reserves, Crown land and private properties can all have different requirements. State legislation may regulate threatened plants, native vegetation, biosecurity movement or access to protected areas. In addition, Aboriginal cultural heritage laws and local protocols may apply. Contact the relevant council, parks agency or Traditional Owner organisation before treating a mapped point as available.

Field Checks Before Gathering Seed

• Confirm access permission and any seasonal closure or fire restriction
• Check for hazards such as unstable banks, traffic, snakes, heat and floodwater
• Verify species identity using a field guide or qualified local adviser
• Assess whether enough seed remains for birds, insects and natural regeneration
• Photograph and record the visit before taking any material

In Australia, seed maturity is often triggered by local rainfall and temperature rather than a fixed calendar date. A dry spell may advance capsule opening, while a cool season can delay it. Record flowering, fruit colour and seed condition during each visit so the group builds a local phenology record over time.

Use a collection protocol that limits pressure on each parent tree and spreads material across multiple trees. For practical handling and ethical harvesting guidance, volunteers can follow this seed collection guide, then add their own local requirements from the relevant land manager.

Keep the Map Useful Over Time

A seed map becomes valuable when it records change. Add visit dates, observed seed quantity, collection outcomes, regeneration, weed growth and access problems. A site that was excellent last year may be unsuitable this season because of drought, fire, storm damage, development or a disease outbreak.

Use simple status labels: candidate, verified, ready, collected, resting and retired. “Resting” can indicate that a site needs time before another collection, while “retired” can show that a tree has died or permission has ended. Avoid deleting old points; an archive preserves the project’s history and helps explain future decisions.

Protect sensitive locations when the map is shared publicly. A public-facing map may show a general reserve or restoration corridor, while the working map keeps exact coordinates private. This reduces the risk of overharvesting, vandalism or unwanted access to culturally significant places.

Environmental conditions should also be part of the record. In Australia, road runoff, salinity, fertiliser drift and urban pollutants can affect seed-source quality. Chloride from de-icing salt is a more prominent issue in parts of North America, but Australian alpine roads and cold-region infrastructure can also experience winter salt impacts. Reading about road salt impacts provides useful context when assessing roadside trees and watershed health.

Keep Volunteers Consistent

• Use the same species names, status labels and date format in every record
• Review new pins for duplicate trees or inaccurate locations
• Back up the map and spreadsheet after each organised collection
• Give volunteers a short field form rather than relying on memory
• Share maps with only the access information each group needs

A monthly review can be enough for a small project. One coordinator checks new records, resolves duplicate points and marks sites that need permission. Larger programs can assign separate roles for mapping, species verification, landholder contact and data protection.

The finished map should support action, not become an end in itself. It can guide a school excursion, help a council plan creek restoration, show a nursery where local seed came from, or reveal gaps where another survey is needed. With a few free tools and careful field checks, mapping seed collection sites becomes a repeatable part of watershed stewardship.

Set up a shared map, choose one accessible reserve and record three candidate parent trees this season. Invite a local Landcare group, school, nursery or workplace team to verify the points, follow collection permissions and contribute observations that make the next planting effort stronger.