Autumn 2020 (and susequent years) we are commited to the Sierra Lujar project in Granada, Andalusia.

In 2021 we will be ready to start a project in the Sierra Mariola Natural Park, in Alicante.

Together with Dronecaria and the Segovia for the Climate Association, we launched a reforestation project with the use of drones for the spring of 2020.

Sierra Lujar


The Sierra Lujar, between the Sierra Neada Nt. Pk. and the Mediterranean sea, is heaily degraded due to charcoal, mining, the last decades fires and the state policies of reforestation only with pine trees.

The Semillistas Association intends to restore more than 4,000ha of the Sierra Lujar during the next 10 years. In the fall of 2020 we will sow hundreds of thousands of seeds for 20.000 trees and shrubs to stablish themseles in the ground.

Currently, half of the mountain range is filled by pines from reforestations. They have minimal understory. Due to successive fires,, the other half retains, in the best areas, a wide variety of small shrubs as well as few species and shallow soil in the most degraded areas. Due to the gradient altitude of the Sierra Lujar, between 300 and 1900 mts. And also due to the deep ravines, the mountain has a great variety of habitats that allow for stablishing different plant-communities framed in the Mediterranean ecosystem of the holm oak. Iwe find to areas whereareas were low soil conditions does not allow other than small bushes to areas were we can plant oaks and strawberry trees.


Most of the project is located on the “road of the miners”(carretera de los mineros). Here the soil is apt for the introduction of oak and kermes oak, which will go together with a diversity of shrubs: black hawthorn, mastic, broom, bowline, black broom, red thyme, mugwort, rue, lavender, candilera, digitalis, rockrose white and cruet. On the Rivas hill the soil is rather shallow, the rock surfaces continuously. For such terrain we choose species that allow the soil to develop and fracture the rock within 100 years. Hoping our grandchildren will be able to plant acorn. We will plant very scattered Alepo pine, accompanied by broom, red thyme, mugwort, rue, lavender, candilera, white rockrose and cruet. At the head of the Barranco de Castillejos, in a deep shaded area at 1300 mts. Of altitude, we will plant strawberry trees, holm oaks, gall oaks and kermes oak.

Truffers for oaks

All quercus will be sown together with mycorrhizal spores of the genus Tuber (truffles, see photo). We will introduce spores of Pisolithus sp to the pine. Also seeds with and without mycorrhiza will be sown to test the effects in the establishment on the trees.

In such severe climatic conditions and such a degraded soil, the introduction of plant species without their corresponding mycorrhizae is meaningless in view of the plant succession to the forest that we are supporting for it to come to fruition. Let us remember that a forest is not just trees, it is the interrelation of infinite forms of life.

We have started a project to obtain arbuscular mycorrhizae (those used in small shrubs) to use them in the project from 2021. You can find more information on this project at treenation.

Techniques we use

Due to the climatic peculiarities of the Southeast of the Peninsula Ibérica, we hae to do a preliminary work in the laboratory to ensure that the seeds germinate with a single rain. Our seed thechnology is based on 4 aspects: priming treatments, pelleting, mycorrhizae and sowing under nurse.

Sierra Mariola

The lockdown on March 13th, 2020 Treenation stoped the project which has been postponed to Autumn 2021. In the meantime we continue to carry out small scale planting in arious habitats. With the data from this tests, we can make better decisions for a medium-scale project.

The problems located in this mountains are twofold and the excess of pine forests and the fires caused by it. The project we are presenting aims at restoring burned areas in 2021 as well as diversify species under the pine forests. The replacement of the pine forest by native vegetation (based oak) is one of the most urgent tasks to be carried out to stop the fires that ravage our mountains.

As we make progress in defining the project, we will publish further information.