Tuscan Blue

Family: Lamiaceae Herb

Planting Schedule

Provide your location or planting zone to unlock dates and add Tuscan Blue to a garden.

Tuscan Blue rosemary unfurls with an unmistakably cool, piney fragrance and a silvery-blue cast that catches the light like fine felt.

Its narrow, needlelike leaves hold a crisp, resinous bite and stay aromatic as plants mature, making it a standout for fresh sprigs and drying alike. Grow this compact, upright rosemary for bold flavor in herb-forward blends and for fragrant bouquets that keep their character season after season.

Light: Full SunHabit: Upright

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Tuscan Blue Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Apr 20th	Jul 27th	Jul 27th – Jul 15th
Zone 1b	Apr 6th	Jul 13th	Jul 13th – Aug 1st
Zone 2a	Mar 30th	Jul 6th	Jul 6th – Aug 29th
Zone 2b	Mar 20th	Jun 26th	Jun 26th – Aug 25th
Zone 3a	Mar 20th	Jun 26th	Jun 26th – Sep 1st
Zone 3b	Mar 24th	Jun 30th	Jun 30th – Sep 21st
Zone 4a	Mar 20th	Jun 26th	Jun 26th – Sep 24th
Zone 4b	Mar 18th	Jun 24th	Jun 24th – Sep 27th
Zone 5a	Mar 13th	Jun 19th	Jun 19th – Sep 30th
Zone 5b	Mar 9th	Jun 15th	Jun 15th – Oct 5th
Zone 6a	Mar 6th	Jun 12th	Jun 12th – Oct 10th
Zone 6b	Feb 28th	Jun 6th	Jun 6th – Oct 16th
Zone 7a	Feb 23rd	Jun 1st	Jun 1st – Oct 20th
Zone 7b	Feb 13th	May 22nd	May 22nd – Oct 28th
Zone 8a	Feb 4th	May 13th	May 13th – Nov 5th
Zone 8b	Jan 26th	May 4th	May 4th – Nov 12th
Zone 9a	Jan 9th	Apr 17th	Apr 17th – Nov 26th
Zone 9b	Dec 15th	Mar 23rd	Mar 23rd – Dec 9th
Zone 10a	—	Oct 1st	Nov 15th – Feb 28th
Zone 10b	—	Oct 1st	Nov 15th – Feb 28th
Zone 11a	—	Oct 1st	Nov 15th – Feb 28th
Zone 11b	—	Oct 1st	Nov 15th – Feb 28th
Zone 12a	—	Oct 1st	Nov 15th – Feb 28th
Zone 12b	—	Oct 1st	Nov 15th – Feb 28th
Zone 13a	—	Oct 1st	Nov 15th – Feb 28th
Zone 13b	—	Oct 1st	Nov 15th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	N/A
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	10

Culinary Notes

Chef's Note

Tuscan Blue rosemary is built for heat and time: its needles stay assertive without turning chalky, giving you that clean pine-resin snap from the first bite to the finish. Use it in oil or butter so the aromatic oils bloom fast, then let the roasting/braising do the heavy lifting.

Best Uses

chopped into oily marinades for lamb and pork before a hot roast
steeped and then removed in olive-oil or butter for a fragrant drizzle
dry-rubbed onto potatoes and roasted vegetables (needle clusters hold up to heat)
warmed sprigs in stews and braises, then fished out to keep the soup clean

Flavor Profile

cool, piney aromatics crisp resinous bite silvery-herbal bitterness on the finish

Kitchen Pairings

garlic lemon olive oil lamb pork Parmesan

Frequently Asked Questions

What pest or disease most commonly affects Salvia rosmarinus (Tuscan Blue), and how can I treat it?

Watch for fungal leaf spot and root rot, especially when plants stay wet or in poorly drained soil. Remove infected leaves, improve airflow around the plants, and water only at the base; if disease is spreading, apply a copper-based fungicide labeled for herbs following the label rate. Prevent recurrence by letting the soil dry slightly between waterings and avoiding overhead watering.

How often should I water Tuscan Blue (Salvia rosmarinus) during active growth, and what soil moisture level should I maintain?

During the main growing season, water deeply about once every 7–10 days, then allow the top 1–2 inches of soil to dry before watering again. Salvia rosmarinus prefers evenly moist early on, but it quickly declines in constantly wet soil—aim for “moist but not soggy.” Use well-draining soil and adjust frequency downward during cool or rainy periods.

How do I tell when Tuscan Blue is ready to harvest?

Harvest when the plant has formed sturdy, non-floppy stems and abundant leaf growth, typically after it establishes and starts producing new shoots. For best flavor, pick in the morning and harvest before flowering begins; snip stems just above a leaf node to encourage fresh regrowth. You can do light harvesting repeatedly through the growing season, but avoid cutting back hard right before cold weather.