The vegetation of the hillside areas of La Lajita area is sweet tabaibal (Lycio intricati-Euphorbietum balsamiferae). Today, this vegetation is not represented itself, largely because it was heavily exploited in the past for fodder, fuel and latex collection. The sweetest and closest tabaibales are in the eastern slopes of Mountain Cardones (9 km North towards the Botanical Gardens), where extensions are small but fairly well preserved in this vegetation type, together with other genuine cardonal (Kleinio neriifoliae-Euphorbietum canariensis ) and Risco Colinos (11 km east-northeast of the Garden), where only twenty sweets tabaibas survives. From this type of potential vegetation, in La Lajita only exists limited and testimonial presence, in rocky areas, of some verode specimens (Kleinia neriifolia), a common element of cardonal-tabaibal communities.
On the other hand, in the funds of valleys and cliffs of La Lajita there are woods of tamarisk (verae-Tamaricetum Suaedo association canariensis), partly invaded by foreign tree species such as Acacia salicina, due to the intense human disturbance in the area.
The existing perennial vegetation consists primarily of the vegetation association tomentosae-Salsoletum Chenoleoido vermiculatae (nitrophilous arid scrub), a training substitute which can also be a permanent community in very arid and degraded and in which the most common species are the gorse (Launaea arborescens) and matabrusca carambilla (Salsola vermiculata). This scrub short and stocky covers a large area of the island, especially in coastal regions and mediocrities.
In autumn, winter and part of spring are found nitrophilous communities, belonging to the phytosociological class and Tuberarietea mediae Stellarietea guttatae, whose extent and degree of development is entirely dependent on rainfall.