Hyssopus Officinalis

Hyssop

Zone 1a Save Garden

🌱 75d to harvest Upright

Breathe in the crisp, resin-bright fragrance of Hyssop—cool minty notes threaded with a faint, sweet herbal warmth that lingers l…

Crop Dates

Milestone	Date
Start Indoors	Jun 1st
Last Frost	Jun 15th
Transplant / Sow Outdoors	Jul 27th
Harvest Begins	Oct 10th
Harvest Ends	Jul 15th

Crop Details

Trait	Value
Days to Maturity	75
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)	7

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Frequently Asked Questions

What pest or disease commonly affects Hyssopus officinalis, and how do I treat it?

Hyssopus officinalis often suffers from powdery mildew (white, dusty growth on leaves), especially in humid or crowded conditions. Cut back heavily infected foliage, improve airflow by spacing plants, and water at the soil line rather than overhead. If it spreads, use a labeled sulfur or potassium bicarbonate treatment according to the product directions.

How often should I water Hyssopus officinalis during active growth?

During the main growing phase, water when the top 1 inch of soil feels dry, then soak thoroughly until excess drains. Aim for consistently moist-but-not-soggy soil; Hyssopus is drought-tolerant once established and will decline in persistently wet conditions. In full sun, this often means about 1–2 deep waterings per week depending on your soil and heat.

When is Hyssopus officinalis ready to harvest?

Harvest when plants reach about 70–90 days after sowing (roughly the 75-day maturity window) and the stems are leafy and well established. For best flavor, pick sprigs just before or at the start of flowering, when buds are visible but not fully open. Snip in the morning and leave enough stem and leaf growth for the plant to regrow after cutting.

Breathe in the crisp, resin-bright fragrance of Hyssop—cool minty notes threaded with a faint, sweet herbal warmth that lingers long after you brush the foliage. This aromatic perennial forms upright, branching clumps with narrow, deep-green leaves and produces spires of vivid blue to violet flowers that add a lively, garden-fresh character to every planting. Grow it for its intensely scented foliage and blossoms, prized for aromatic infusions and fragrant bouquet-style drying.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 7 days first.

Expert Note

Start hyssop in light, keep seedlings evenly moist, and transplant only after nights stay warm to avoid slow, weak growth.