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News & Updates

Evaluations of Tree Survival Rates in Reforestations

The success of reforestation programs relies on periodic monitoring of trees planted at different periods of time.

August 10, 2023

Alternare has carried out evaluations of tree survival rates two or three years after the plantations are established. So far, they have performed three evaluations and have recorded a high percentage of tree survival throughout the years which translates into the consolidation of a good forest mass. The following table shows their results:

Period of
Year of

The survival percentages on the last three columns are classified in three categories:

  • Good: Greater than 50% of trees present.
  • Moderate: Between 30 and 49% of tree present.
  • Bad/Poor: Between 0 and 29% of tree present.

The classification indicates that sites with good survival tend towards the consolidation of the forest mass. Sites with moderate survival are in a transitional phase, while sites with bad/poor survival rates tend to become agricultural plots or grazing areas.

The photo sequence below shows the amazing results obtained at "El
Rincón" indigenous community with an average growth of trees as follows:

YearAverage height of

trees (in meters)


El Rincon April 2012 – planted seedlings grew on average one meter since placed on the ground in 2010

El Rincon May 2013 – trees ranged 1.8 to 2 meters tall after three years of being planted

El Rincon June 2014 – trees ranged 2.5 to 3 meters tall after four years of being planted

El Rincon July 2023 – trees ranged 12 to 15 meters tall after 13 years of being planted

El Rincón July 2023 - trees grew to an average of 12-15 meters

To read more about our reforestation projects go to our habitat conservation page.

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