Bristly lady's thumb.

En un coup d'œil

Niveau d'entretien

Facile

Type de plante

Annual herb

Lumière

Full sun to partial shade

Lumière en intérieur

Lumière vive indirecte

Arrosage

Tous les 2 à 4 jours

Taille adulte

1 to 2 feet

Croissance

Rapide

Rusticité

USDA 5 à 9

Floraison

Mid summer to late autumn

Entretien

Keep the soil consistently moist to mimic its natural damp habitat. Watch for wilting if the soil dries out too much. It is a vigorous grower so keep an eye on it to make sure it does not crowd out other plants.

Arrosage

Keep the soil damp at all times.

Engrais

Use a balanced liquid fertilizer during the active growing season.

Taille

Trim back spent flower spikes to encourage more blooms.

Rempotage

Since it is an annual, you will typically replace it each season.

Sol

Moist, fertile soil

pH du sol

Neutral to slightly acidic

Température

-10 à 35°C

Humidité

40 à 80%

Sécurité

Humains

There are no reports of significant toxicity to humans.

Enfants

The small seeds and stems pose a minor choking hazard if ingested by small children.

Allergènes de contact

The stems can cause mild skin irritation in sensitive individuals.

Allergènes aéroportés

Pollen may cause mild reactions in those prone to seasonal allergies.

Comestibilité

This plant is not considered edible and should not be consumed.

Comment l'identifier

• Pink flower spikes
• Bristly leaf sheaths
• Lance shaped green leaves
• Reddish stems
• Small dark seeds

Hauteur

0,2 à 0,6m

Envergure

0,3 à 0,9m

Feuilles

green, deciduous

Fleurs

pink, magenta, 0,5 à 1cm

Fruits

black, Autumn

Problèmes courants

• Aphids — Small insects that cluster on new growth and suck plant sap.

La cultiver

Multiplication

seed

Quand planter

spring

Pair this plant with other moisture loving species to create a lush, low maintenance border.

Bonnes associations

• Eutrochium purpureum — They share similar moisture needs and provide a nice height contrast.
• Cardinal flower — Both thrive in the damp conditions this plant prefers.

Espèces similaires

• Persicaria maculosa — It has a similar growth habit but features a dark spot on its leaves.

Science

Famille

Polygonaceae

Genre

Persicaria

Ordre

Caryophyllales

Classe

Magnoliopsida

Région d'origine

Eastern Asia

Préservation

It is considered an invasive weed in many regions outside its native range.

It colonizes open, moist, and disturbed habitats by producing vast quantities of easily dispersed seeds.

Intérêt pour la faune

nectar source

Pollinisateurs

abeilles, papillons

Utilisations

ground cover, pollinator garden, naturalized areas

Taxonomie vérifiée avec le GBIF.

Ce qu'on demande souvent

Is it invasive?

Yes, it spreads aggressively by seed and is considered invasive in parts of North America.

How do I control it?

Pull the plants before they set seed to prevent further spread.

D'où vient le nom

The name Persicaria comes from the Latin word for peach, referring to the leaf shape, while longiseta refers to the long bristles on the stem sheaths.

Bon à savoir

• It is often called bristly knotweed due to the stiff hairs on its stem sheaths.
• The plant thrives in damp, disturbed soil like riverbanks or garden beds.
• It can produce thousands of seeds in a single season.