TreeRM

ARBA - Asociación para la Recuperación del Bosque Autóctono

Madrid, Comunidad de Madrid, Spain · Nonprofit · National · since 1986

Volunteer-run Spanish association restoring native woodland from its own nurseries since 1986

WebsiteVolunteer with themDonate to themTheir events calendar
Reforestation (primary) Nurseries & seedlings Seed collection Education & advocacy

About

ARBA was founded in Madrid in 1986 and is now a network of about 35 autonomous local groups across the Iberian Peninsula with around 2,000 members, all unpaid volunteers. The groups run native-plant nurseries (ARBA Madrid holds a monthly 'Día de vivero' work day), organise autumn-winter restoration plantings that it classifies as educational, scientific or protest plantings, run school programmes (ARBA Educa) and campaign on issues such as herbicide use and hunting. It estimates it has sown more than three million seeds and planted just over 250,000 native trees, refuses payment per tree planted, and funds itself through member dues and donations.

What they run

Restauraciones (planting campaigns) Reforestation1986–present

Autumn-winter volunteer plantings of nursery-grown native species on degraded land, run by each local group; the first was in Riaza (Segovia) in 1986.

Días de vivero (nursery work days) Nurseries & seedlings

Monthly open work days at ARBA Madrid's nursery to sow, transplant and care for native plants later used in restorations or donated to other groups.

ARBA Educa Education & advocacy

School visits, nursery visits and planting activities with pupils; publishes activity reports per school year (2019/20 to 2021/22).

Trees by type of work

ActivityTreesYears
🌲 Reforestation250,0002016

Only figures attached to a named program count here. Organization-wide totals sit in the table below.

The numbers

MetricYearValueProgramConfidenceSource
Volunteers engaged20262,000Organization-wideEstimatedsourceQuiénes somos page: 'alrededor de 2000 socios' and 'Todos somos voluntarios'; membership used as a proxy for active volunteers, so treat as approximate
Trees plantedto date2016250,000Restauraciones (planting campaigns)Self-reportedsourceRestauraciones page (undated, read 2026-11-07): 'ARBA lleva treinta años ... calculamos que hemos puesto más de tres millones de semillas y hemos plantado algo más de doscientos cincuenta mil árboles'. 'Thirty years' from the 1986 founding dates the statement to about 2016

How they report

Transparency
25 / 100 · Thin
What earned it
  • 0/20 Publishes annual tree figures: No year-by-year figures found
  • 0/15 Figures are recent: No dated annual figure
  • 10/10 Every figure has a public source: 2 of 2 figures link to a source
  • 0/15 Publishes financials or cost per tree: No financial figure recorded
  • 0/15 Reports survival or monitoring: No survival or monitoring figure
  • 0/10 Independently verified figure: All figures are the organization's own
  • 10/10 Breaks figures down by program: Figures attached to named programs
  • 5/5 Reports volunteers or events: Volunteer figures on record
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