Seed Depth: 1/4 inch

Seed Spacing: 12–18 inches

Row Spacing: 18–24 inches

Sunlight: Full sun

Days to Sprout: 14–21 days

Days to Maturity: 85–90 days

Growth Habit: Upright, bushy perennial

Sunlight: Requires full sun, with at least 6–8 hours of direct sunlight daily.

Soil Type: Thrives in well-drained, moderately fertile soil with a pH of 6.0–7.5. Adding compost enhances growth.

When to Plant: Sow seeds directly outdoors after the last frost, or start indoors 6–8 weeks before the last frost.

Direct Sowing: Plant seeds 1/4 inch deep, spacing them 12–18 inches apart in rows 18–24 inches apart.

Indoor Sowing: Sow seeds in trays with light potting soil. Transplant seedlings outdoors when they are 4–6 inches tall.

Succession Planting: Not needed; hyssop is a perennial that returns each year once established.

Watering: Water sparingly, allowing the soil to dry slightly between waterings. Hyssop is drought-tolerant once established.

Fertilizing: Apply a light compost dressing at planting. Avoid over-fertilizing, as this can lead to excessive foliage growth.

Pruning: Trim plants after flowering to encourage bushy growth and prevent legginess.

Pest and Disease Control: Generally pest-resistant, but monitor for aphids or mildew. Use organic treatments if needed.

When to Harvest: Harvest leaves just before flowering for the most intense flavor, typically 85–90 days after planting. Flowers can also be harvested when fully open.

How to Harvest: Snip stems with scissors or pruners, leaving enough foliage for the plant to regenerate.

Seed Collection: Allow flowers to mature and form seed heads. Collect seeds when dry.

Storing Seeds: Dry seeds thoroughly and store them in an airtight container in a cool, dry place.