St John's wort (Hypericum perforatum)

Botanical fact sheet

Hypericum perforatum

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Common name: St John's wort
Taxonomy: Family: Hypericaceae · Genus: Hypericum

Still missing: plant type, native distribution, natural habitat, height / growth form, flowering period, growth & dormancy period.

Community knowledge

Tips & experience from members

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Real data

How members water it

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Care guidelines

How it thrives

Partly general data for the genus Hypericum

Waterlow

Lightfull sun

Humiditylowgeneral genus data

Min. temperature-30 °C

Cold winter dormancy · general genus dataDifficulty: ●○○○○ · general genus data⚠ May be toxic to pets / people · general genus data

No monthly schedule is shown because cultivar-/species-level data is not yet sufficient. The general values above are guidance only.

Hypericum tip: Harvest the flowering tips around midsummer on a sunny morning.

⚠ Pets & children · genus Hypericum

🐴Horse moderate🐮Cattle moderate🐐Sheep, goat moderate🐷Pig moderate🐱Cat mild🐶Dog mild🐰Rabbit, rodent milddetails →

At a glance

St John's wort – what to know

St John's wort (Hypericum perforatum) – family: Hypericaceae, genus: Hypericum. Care guidelines: light: full sun; water: low; min. -30 °C. For cats: mildly toxic; for dogs: mildly toxic. Keep it out of reach and call a vet straight away if you suspect poisoning.

All Hypericum species in the catalog →Detailed toxicity data →

Frequently asked questions

How often should I water St John's wort?

Sparingly: let the soil dry out completely between waterings, and water even less in winter.

How much light does St John's wort need?

It needs plenty of direct sun – the sunniest window, or outdoors in summer, suits it best.

How cold can St John's wort get?

Frost-hardy to about -30 °C – it can overwinter outdoors in many climates.

Is St John's wort toxic to cats and dogs?

For cats: mildly toxic; for dogs: mildly toxic. Keep it out of reach and call a vet straight away if you suspect poisoning.

When does St John's wort flower?

According to the general guideline for the genus Hypericum: Typical flowering time: June, July, August.

Community intelligence

What members’ data shows

When does it really bloom?

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Average watering interval

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Who grows it?

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Questions about this species

Care data is for guidance only.