How to Grow Hyssops
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Hyssop (Hyssopus officinalis) — Herbaceous perennial or evergreen sub-shrub with linear, aromatic leaves and spikes of tubular, 2-lipped flowers.
Unlike an annual crop, the work here is front-loaded into establishment: get the planting and the site right and the same plants crop for several seasons.
Core growing advice on this page is checked against named horticultural sources — see References.
Hyssop (Hyssopus officinalis)
2 sources cited · Verified
Growth Stages
Quick Facts
At a Glance
Harvest & Storage
Diseases
Pests
Plan your Hyssops planting
Timing for Hyssops follows soil temperature and frost, not the calendar date. The Global vegetable planting calendar explains the method. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.
Growing Hyssop in another region
Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.
Sources
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Hardiness: zones 3-11, cold hardy to -35°F. Site/soil: full sun, tolerates partial shade; compost-rich, well-drained soil; pH 7.0-8.0, slightly alkaline. Spacing: 12-18in apart. Sowing: indoors a week or so before last frost, or direct-sown after last frost or in autumn; 1/4in deep, germinates in about 14 days. Harvest: leaves as needed before flowering; pick flowers when blooms are three-quarters open, in the morning; cut whole branches for drying leaves or flowers. Pests: scale (picked off and crushed) and nematodes can occur. Diseases: susceptible to root rot in soggy soil -- ensure well-drained soil. Propagation: readily self-sows from seed; 6in stem cuttings with rooting hormone; 4-6in root divisions in spring or fall.
These source is specific to this region. The full list of 2 sources behind this guide (Harvest to Table, Royal Horticultural Society) is in the references of our UK guide to hyssop; they describe the plant itself, which is the same wherever it grows.
Frequently Asked Questions
What problems affect hyssop?
Our data links 1 disease and 3 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
This page gives you the thresholds; the planner turns them into your own calendar. It works from what you can observe and measure in your garden rather than from dates written for somebody else’s latitude.
Get the Global Garden Planner →Instant PDF download · Works in either hemisphere
How this guide is put together
The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against international horticultural research and extension sources. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.
Last verified 2026-09-04
Related guides
More from the same group (herbs & aromatics):
Where To Go From Here
Take this crop from reading into a written plan for your own beds.
Keep going
Plan the next step
Use the printable SoilCommander planner for your region to turn this guide into sowing dates, bed layouts and weekly garden tasks.