Similar to many members of the mint family (Lamiaceae), sages (Salvia spp.) aren't demanding. Most are low-fuss plants that are easy to grow if placed in the right location. This list suggests Salvia companion plants, many of which are also low-fuss, mint family members. They add attractive variety to the Salvia garden.
The growing requirements for any plant depend on the temperature range, soil, elevation, sunshine, moisture level and other features of the plant's native land. Great companions have similar cultural needs. So when selecting companion plants, it's necessary to consider whether their needs are compatible with those of the sages you plan to grow.
Gardeners and writers often refer to the Salvia genus as being heat tolerant and drought resistant. Although this is true of many species, there are ones that need regular watering and some that like ample moisture.
Similarly, some sages need partial shade at some point during the day whereas others almost seem to shout 'Bring on the sun; bring on the heat!' The moisture level of shady areas is another consideration. Plants that need ample water are unlikely to grow well in dry shade whereas damp shade won't do for dry garden shade plants.
This list of companions contains plants for dry, regular and damp gardens as well as for full sun and partial shade. Compare the plant descriptions -- from cold hardiness to bloom seasons -- with those for your sages and you will create companionable relationships in the garden.