Hemp
Cannabis sativa · Cannabaceae
The gardener's calendar
Ideal time to plant hemp: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- Late summer to autumn
- Adult size
- 1 to 2 m in height depending on varieties
- Growth
- Very fast
- Hardiness
- Low hardiness, prefers temperate to warm climate
- Origin
- Central Asia
- Soil type
- Well-drained, fertile, slightly alkaline
Care
Watering
Keep the soil moist but not saturated. Water regularly during active growth period, especially during prolonged dry spells. Let the soil dry slightly between waterings to prevent root rot.
Light Exposure
This plant requires a minimum of 6 to 8 hours of direct sunlight daily for optimal growth. A south-facing exposure is ideal to maximize photosynthesis.
Soil Preparation
Prepare a substrate rich in organic matter, well-drained and slightly alkaline. Incorporate mature compost and ensure good aeration to promote root development.
Fertilization
Apply a balanced fertilizer during the vegetative growth phase, then switch to a phosphorus-rich formula during flowering. A monthly application is generally sufficient.
Pruning and Maintenance
Pruning is not essential but you can pinch the top to encourage denser branching. Remove lower or damaged leaves to improve air circulation.
Pests and Diseases
Watch for spider mites and whiteflies, particularly indoors. Powdery mildew can occur in humid conditions; ensure good ventilation and avoid excessive humidity.
Did you know?
Cannabis sativa has been cultivated for thousands of years in Asia, not only for its properties but also as a source of exceptionally resistant textile fibers. Ropes, sails and hemp-based fabrics equipped the greatest ancient civilizations and the ships of the modern era.
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.
Add this plant to my garden →Plants from the same family
- HopHumulus lupulus
- Nettle treeCeltis australis
- HackberryCeltis occidentalis
- Trema micranthumTrema micranthum
- Celtis laevigataCeltis laevigata
- Japanese hopHumulus scandens
Tips generated and checked by Viridia — adapt them to your local climate.