This is a range-restricted species, known from few locations on the mountains of Peloponnese, making it rare in the country. Its extent of occurrence (EOO) is around 828 km², its area of occupancy (AOO) is 20 km² and the number of locations is three. Research and monitoring of the species are extremely urgent, as a climbing field in Langada gorge is going to cause the decline of mature individuals in this site, and consequently in the total population. Another threat the species possibly faces is climate change which could also cause the decline of mature individuals. The species is classified as Endangered under B1ab(v)+2ab(v).

Hypericum taygeteum is a rare Greek endemic, growing on the mountains of south Peloponnese, namely Mts Taygetos, Parnonas, Korakia and Chionovouni (Tan and Iatrou 2001, Kalpoutzakis and Constantinidis 2005).

The only data available for the taxon's population come from Kalpoutzakis et al. (2009), who state that the species is often absent from possibly suitable locations, even if they are close to existing subpopulations. They also noticed a small number of young individuals, in all subpopulations, which means that the seedlings establish themselves on the rocky substrate with difficulty. The team measured the largest subpopulation on Mt Taygetos, consisting of approximately 1,000 individuals. The subpopulation on Mt Parnon is located in two sites above Polydroso village, each hosting 100-150 plants approximately. The subpopulation of Korakia consisted of 60 individuals and on Mt Chionovouni, approximately 450 plants were counted. At the time, the total population was estimated to be less than 4,000 mature plants. Further surveys are obligatory, in order to estimate the population status.

According to Kalpoutzakis et al. (2009), this species grows on vertical or almost vertical limestone cliffs, in shady or semi-shady, protected spots. It has rarely been seen in the basis of those cliffs, possibly because it is foraged by animals. On Mt Taygetos, it is distributed on the upper segments of the Langada gorge, in rocky places surrounded by maquis. Some plant groups are located under Platanus orientalis, often in north exposures, along with Stachys chrysantha and Cymbalaria microcalyx. On Mount Parnon, the subpopulation is abundant on shady rocks of west-northwest exposures, inside Abies cephalonica forest. On Korakia and Chionovouni mountains, the subpopulations exist on semi-shady, vertical limestone cliffs in maquis vegetation.

Several sites where Hypericum taygeteum is found, are influenced by human activities, such as grazing, recreation, religious pilgrimages, road network (Kalpoutzakis et al. 2009). It is fortunate that the species grows on vertical rocks, inaccessible to animals. However, the construction of a climbing field on Langada gorge, puts a risk on the largest subpopulation. Furthermore, the small number of the taxon's locations make it vulnerable to major changes in its habitat, such as climate change, as it is a hemi-cryptophyte growing on high altitudes in the Mediterranean, which is a hot-spot for climate change (Giorgi 2006) and will be affected by climate change (Seddon et al. 2016) by driving species upslope, enhancing species invasion and disrupting ecosystem services, such as pollination (Inouye 2008, 2020; Vasiliev and Greenwood 2021).The Mediterranean has long stood out in successive generations of global climate models as being particularly sensitive to rising concentrations of greenhouse gases. Models overwhelmingly project, across all scenarios, a large reduction in precipitation, more than in other land regions in relative terms (Giorgi and Lionello 2008, Tuel and Eltahir 2020). A large part of that decline occurs during winter, south of 40°N. According to Rojas et al. (2013), projections (2021–2050) of the winter Mediterranean weather and climate, using the LMDz model and the SRES A1B emission scenario, see a significant warming (between 2 - 4°C) to occur in the region, along with a precipitation decrease by 10–20 % in southern Europe, Mediterranean Sea and North Africa, against a 10 % precipitation increase in northern European areas. Also, according to Zittis et al. (2019), the more vulnerable southern Mediterranean regions, with a typically lower adaptive capacity, are projected to experience strong warming, mainly in summer, combined with pronounced drying, mainly during the wet period. Rota et al. (2022) state that most mountain plant species are expected to shift their distributional range upward, causing a change of current vegetation communities and altering the equilibrium of high mountain ecosystems (Pauli et al. 2003, Parolo and Rossi 2008). Species occurring at the highest altitudes may be extensively affected because they cannot shift their distributional range further upward (Dullinger et al. 2012). Even if mountain topography buffered the effects of climate change on plants, the poor ability of endemic plants to disperse, can impede them from tracing the geographical shift in climatically suitable environments. The Hellenic Ministry of Environment and Energy has created climate change projection maps (2023), in the frame of a LIFE programme, with the contribution of the Athens National Observatory and the Athens Academy of Sciences. According to the map of change in number of precipitation days per year in the near future (2031-2060), in relation to years 1971-2000, based on the average of seven chosen simulations of EURO-CORDEX (HadGEM2-ES_r1i1p1_RCA4, MPI-ESM-LR_r1i1pi_RCA4, EC-EARTH_r3i1p1_ΗΙRΗΑΜ5, EC-EARTH_r12i1p1_CCLM4-8-17, CNRM-CM5_r1i1p1_RACMO22E, HadGEM2-ES_r1i1pi_RACMO22E and MPI-ESM-LR__r1i1pi_REMO2009), according to emissions scenario RCP8.5, the habitat of H. taygeteum will face a decrease of 13 rainy days per year, approximately. Therefore, it is believed that it will be affected by climate change in the following years, with loss of mature plants.

All locations, where Hypericum taygeteum is found, are within Natura 2000 sites, namely: GR2540007 (ORI ANATOLIKIS LAKONIAS), GR2520006 [OROS PARNONAS (KAI PERIOCHI MALEVIS)] and GR2550009 (OROS TAYGETOS - LAGKADA TRYPIS). The species is also protected by law (Presidential Decree 67/1981), but no conservation measures have been taken so far. Research has to be done for the entire population of the species, in order to effectively protect it, as well as for its ecology, the threats it faces in every site and actions that must be taken towards its conservation. Monitoring its subpopulations for several years, along with planning its recovery and management of the area it occupies, are extremely urgent. Germplasm must be kept in seed banks, as well as ex situ propagation and cultivation of the species. Citizens' awareness and communication of the significance of this taxon for the country's environment will also play a huge role for its survival. The state has to enforce its law. The taxon was assessed in the Red Data Book of Greece (Kalpoutzakis et al. 2009), as Vulnerable, under category D2.