St. John's wort

Hypericum perforatum

Layer 4 · Herbaceous
Dynamic accumulator

Status by region

No restrictions recorded in the lists we checked.

Checked against the European Union list (Regulation 1143/2014) · Portugal's national invasive species list (Decreto-Lei 92/2019).

Information based on the cited sources, not legal advice — always confirm your local rules.

About

Perennial herbaceous plant native to Eurasia, very common in meadows and path verges. Known for its yellow flowers that release a reddish oil when crushed. It is an excellent pollinator attractor and dynamic nutrient accumulator.

See which trees St. John's wort grows well with

Pick the central tree on your land and see the full guild.

No account needed.

Needs

Water: Low
Light: Full sun
Size: Perennial herb up to 0.8 m
Mature diameter: 0.4 m
Soils: Clay, Loam, Sandy, Limestone
Climates: Atlantic coast, Inland / Continental, Hot, dry Mediterranean, Mountain / cold

Calendar

January
February
March — Planting
April — Planting
May
June — Harvest
July — Harvest
August
September
October — Planting
November — Planting
December

Harvest
Planting

Medicinal use: Traditionally used in infusions and oils to relieve anxiety and treat burns.

Where to buy

Grows well with

Central trees this plant has already been paired with.

Sweet chestnut

Central trees worth considering

May work well together — same soil and climate, complementary layers. We have not seen this combination in a generated guild yet.

May grow well with

Suggestions worked out from growing conditions — same soil and climate, complementary layers and functions. These are not observed guilds; treat them as a starting point to try on your own land.