Blue Hill Salvia is a perennial plant that produces small lavender-blue flowers on spikes and has a height of 18 to 20 inches with a spread slightly less than that. The flowers are lighter in color than May Night Salvia and Caradonna Salvia, which is why blue was included in the cultivar name. Other cultivars that are also blue in color are Bordeaux and Blue Spires. Black and Blue Salvia is an even nicer blue but can only be grown as an annual in colder climates. Deadheading the flowers of Blue Hill Salvia plants will encourage continuous blooming throughout the summer. However, these perennials tend to flop over at the sides, but can be supported by encasing them in a peony ring or planting them close enough to other perennials, which will support them. If you want to avoid the problem of supporting the plant altogether, consider growing May Night or Caradonna instead.
Perennial Salvia plants come in blue and purple colors, while red is the most common color for the annual version. Although other colors are available, the blue-white-red triad can be achieved by mixing Blue Hill with annual salvia plants that flower in red and white. Texas Sage is a good cultivar of the red perennial salvia plant, while Victoria White Salvia is the white version of Victoria Blue Salvia.
The best way to grow Blue Hill Salvia is in well-drained soil that receives full sun. These drought-tolerant plants are best grown in USDA planting zones 4 to 8. Blue Hill Salvia plants are deer-resistant perennials that attract butterflies and bees. The leaves are fragrant enough to dry and use in potpourris. They can work well in the front or middle row of a flower border or other planting bed, depending on the heights of the surrounding plants.