This section includes plants traditionally used for industrial, non-food purposes, requiring prior processing for optimal use.

The collection is divided into four subcollections:

Dye plants. Used to obtain dyes and colourants through their chemical compounds, such as flavonoids, tannins or phenolic alcohols. Among others, this section includes common Iberian species such as wild jasmine (Jasminum fruticans), dogwood (Cornus sanguinea), elder (Sambucus nigra) and privet (Ligustrum vulgare), as well as rarer species such as sea buckthorn (Hippophae rhamnoides).

Tanning plants. Species traditionally used for tanning hides and producing leather, such as sumac (Rhus coriaria), introduced to the Iberian Peninsula by the Muslims and highly valued in Middle Eastern cuisine, and Coriaria myrtifolia.

Textile plants. Esparto grass (Stipa tenacissima subsp. umbrosa), native to Almería; New Zealand flax (Phormium tenax); and century plant (Agave americana). This section also includes mulberry (Morus kagayamae), used as a food plant for the silkworm (Bombyx mori).

Crop-protective plants. Species with insect-repellent, insecticidal or fungicidal properties, such as sage (Salvia officinalis), wormwood (Artemisia absinthium), rosemary (Rosmarinus officinalis) and false yellowhead (Dittrichia viscosa).