Cambridge Blue Gentian Sage Salvia (Salvia patens) is a tender perennial that produces stunning cobalt-blue flowers from summer through fall, thriving in zones 8 and warmer. Growing to a tidy 24 inches tall and 12-18 inches wide, this heirloom variety rewards full sun and moderate water with months of blooms that attract pollinators and resist deer browsing. Its compact stature and long flowering window make it a jewel for borders, containers, and pollinator gardens.
1
Full Sun
Moderate
8-8
24in H x 18in W
—
High
Hover over chart points for details
The flowers arrive in an unusual, vivid cobalt blue that stands apart from most garden salvias, and they bloom reliably from June through November in the right climate. Deer pass it by completely, while bees and butterflies cannot resist it. This heirloom has endured in cultivation because it delivers exceptional color and season-long interest without fussiness.
Cambridge Blue Gentian Sage Salvia is grown primarily as an ornamental flower for gardens and containers. Its striking blue blooms work well in mixed borders, pollinator gardens, and cottage-style plantings where its tall flower spikes add vertical interest and attract beneficial insects throughout the growing season.
No timeline data available yet for this variety.
Start seeds indoors 6-8 weeks before your last spring frost in a well-drained germinating mix. Keep the soil temperature between 65-75°F. Seeds will sprout in 7-14 days. Transplant seedlings into individual pots once they develop true leaves and grow them on under bright light until they are ready to harden off.
Harden off indoor-started seedlings over 7-10 days by gradually exposing them to outdoor conditions, then plant after your last frost date when soil has warmed. Space plants 12-18 inches apart to ensure good air circulation.
Direct sow seeds outdoors after your last frost date. Surface sow or lightly cover seeds with soil; they need light to germinate. Keep the soil consistently moist until seedlings emerge in 7-14 days.
Enter your ZIP code to see a personalized growing calendar for this plant.