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Guinea henweed

Petiveria alliacea · Phytolaccaceae

The gardener's calendar

The right move for September

Ideal time to plant guinea henweed: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

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ID card

Common name
Guinea Hen Weed, Country Garlic
Family
Phytolaccaceae
Type
Perennial herbaceous plant
Adult height
30 to 60 cm tall
Foliage
Deciduous to semi-persistent
Flowering
Spring-summer (white flowers in spikes)
Origin
Tropical America and the Caribbean
Hardiness
Warm and temperate climate (minimum 10 °C)

Care

Light

Place Petiveria alliacea in a bright location, in partial shade or full sun depending on your climate. In warm regions, afternoon partial shade is beneficial to prevent drying out. It tolerates well-lit interiors if grown in a pot.

Watering

Keep the soil moist but well-draining, especially during the growing season. Reduce watering in winter or during dormancy. Avoid waterlogging, which promotes root rot. Adjust frequency according to climate and season.

Soil

Rich, light, and well-draining potting mix is ideal. You can enrich the soil with compost or organic matter. In pots, use a universal mix topped with perlite to improve drainage.

Fertilizing

Apply balanced fertilizer once a month during active growth (spring-summer). Moderate application is sufficient; excess nitrogen promotes foliage at the expense of flowers. Reduce or stop in winter.

Pruning and maintenance

Pinch young shoots regularly to achieve a bushy shape. Remove dead wood and damaged parts. Light pruning after flowering encourages branching and better vigor the following year.

Pests and diseases

Watch for mealybugs and spider mites in dry or enclosed conditions. Powdery mildew can appear with excessive humidity. Good air circulation and watering at the base limit these issues. Remove affected parts promptly.

Did you know?

Petiveria alliacea earned the nickname "Guinea Hen Weed" because of its distinctive odor: its leaves and roots release a strong garlic smell when crushed. Used for centuries in Caribbean and Central American traditional practices for its supposed benefits, it remains today a fascinating plant in folk medicine, though its uses require caution and specialist advice.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.