Miss Jessop's Upright

Rosemary

Zone 2b Save Garden

Botanical illustration of Miss Jessop's Upright

🌱 90d to harvest Upright

Breathe in the crisp, resin-bright fragrance of Miss Jessop’s Upright—an aromatic rosemary that grows with a statuesque, upright …

Crop Dates

Milestone	Date
Start Indoors	Apr 3rd
Last Frost	May 15th
Transplant / Sow Outdoors	Jul 10th
Harvest Begins	Oct 8th
Harvest Ends	Aug 25th

Crop Details

Trait	Value
Days to Maturity	90
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

Recommended Companions

Frequently Asked Questions

What pest or disease commonly affects Salvia rosmarinus (Miss Jessop’s Upright) and how can I control it?

Watch for powdery mildew and root rot, especially in humid weather or if the soil stays wet. Improve airflow by spacing plants and water at the base early in the day; remove heavily affected leaves and avoid overhead watering. If you see wilting with soggy soil, let the top 2–3 in (5–7 cm) dry, then adjust watering—Salvia rosmarinus is prone to decline when constantly wet.

How often should I water Salvia rosmarinus during active growth?

During the main growing phase, water deeply only when the top 2 in (5 cm) of soil feel dry to the touch. Aim for roughly 1–2 times per week in summer, less in cool or rainy periods, because Salvia rosmarinus prefers evenly moist-to-dry conditions rather than constant moisture. Mulch lightly to reduce evaporation, but keep mulch pulled back from the crown to prevent dampness.

How do I know when Miss Jessop’s Upright (Salvia rosmarinus) is ready to harvest?

Harvest stems when the plant is in full bloom and the upper flower clusters are just beginning to open—this typically lines up around its ~90-day maturity. For best quality, cut in the morning after dew has dried; pinch back to encourage a second flush. If you’re collecting seed, wait until the flower heads dry on the plant and the seeds look dark and firm before harvesting.

Breathe in the crisp, resin-bright fragrance of Miss Jessop’s Upright—an aromatic rosemary that grows with a statuesque, upright poise and a dense, needle-fine texture. Its leaves are richly green and pleasantly pungent, ideal for infusing robust flavor into everyday garden favorites, from roasting aromas to fragrant sauces and pickling brines. A perennial for the patient grower, it delivers steady harvests of fragrant sprigs season after season.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 10 days first.

Expert Note

Start rosemary warm and then transplant only after nights are consistently above ~50°F; keep new plants on the dry side to prevent damping-off and root rot.