Herb · Lamiaceae family
Hyssop
Hyssopus officinalis
In short a 10-second read
spacing 15 in
Where to plant and how much to water
Sun, soil and water.
It grows best in full sun to part shade, in dry to average soil.
Sun
Soil
Watering
Frost
How much space it takes
Mature size.
The mature plant next to a person (69 in).
Plant 15 in apart.
How to plant: staggered, 11¾ in apart
Reaches maturity in about 5–10 years. The final size depends on the cultivar and the spot — we give the range from smallest to largest.
Calendar
Through the year.
Typical for a temperate climate (four seasons). The line shows the current month.
The year at a glance
Flowers
July–August · blue or purple
Planting
container plant: April–May
Feeding
March–April
Harvest
July–August
What to plant now (April) full list in April (323) →What to plant now (May) full list in May (185) →
Feeding
Nutrition.
0.29 qt/sq ft once in spring · March–April
Pests and diseases
Common problems and what to do.
The most common problems in Central Europe. Protection is listed from the gentlest option.
No serious pests or diseases
The source lists no significant problems.
What to combine it with
Ready-made combinations.
Ready-made Studio combinations with this plant
Click a combination — the Studio opens a new raised garden bed with it already planted.
Frequently asked
Quick answers.
When does hyssop flower?
In July–August; the flowers are blue or purple.
When is hyssop harvested?
In July–August.
Does hyssop tolerate shade?
It tolerates part shade (3–6 hours of sun), but not full shade.
How much space does hyssop need?
At maturity 11¾ in–1 ft 5¾ in wide and 1 ft 5¾ in–1 ft 11⅝ in tall; recommended spacing 15 in.
Sources (14) Checked 24 October 2026
- plants.ces.ncsu.edu
- gd.eppo.int
- bamberger-staudengarten-shop.de
- shop.foerster-stauden.de
- gaertnerei-strickler.de
- extension.oregonstate.edu
- missouribotanicalgarden.org
- rhs.org.uk
- lwg.bayern.de
- yardandgarden.extension.iastate.edu
- wpcdn.web.wsu.edu
- Invasive plant lists — this species is not on them: EU, Slovakia, EASIN
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Harvest