Hemp

Industrial hemp is grown across a range of temperate and warm-temperate regions under regulatory frameworks that specify approved, low-cannabinoid cultivars and set permitted THC thresholds, with cultivation typically requiring licensing or registration.

Production is directed toward one or more of three main products — fiber, grain (seed), or a dual fiber-and-grain harvest — and cultivar choice and management practices differ according to which product is the primary target.

Family

Cannabaceae (hemp family)

Genus and species

Cannabis sativa

Cultivated form

Low-cannabinoid, fiber- and grain-type cultivars registered for industrial hemp production

Growth habit

Fast-growing, erect annual herb producing a fibrous stem and, in female plants, seed-bearing flower clusters

Cannabis sativa has a long history of cultivation across Asia and Europe for fiber and seed, with hemp fiber historically important in rope, sailcloth, and textile production before competition from other fibers and changing regulation reduced its cultivation in many regions during the twentieth century.

Renewed interest in natural fibers, seed oil, and construction materials has led to expanded industrial hemp cultivation in parts of Europe, North America, and Asia under modern regulatory frameworks.

Hemp grows best in temperate to warm-temperate climates with warm conditions and adequate moisture during its rapid vegetative growth phase, which can produce substantial stem height within a single growing season.

The crop is sensitive to late spring frosts at establishment but, once growing vigorously, tolerates a range of temperate growing-season conditions found across many mid-latitude cropping regions.

Hemp performs best on fertile, well-drained loam and silt loam soils with good structure, reflecting its rapid growth rate and substantial nutrient and water demand over a relatively short season.

Hemp is established using certified, regionally approved low-cannabinoid seed, drilled into a well-prepared seedbed, with plant density set according to whether fiber, grain, or dual-purpose production is intended.

• Use of certified, regionally approved cultivars and seed sources in compliance with local licensing requirements
• Density management, since higher density favors fiber stem quality while lower density favors seed yield
• Timely weed control during early establishment, before the rapid canopy closure that later suppresses weeds
• Rotation with cereals or other broadleaf crops to manage disease pressure

Nitrogen supports the rapid vegetative growth central to both fiber and seed yield, while potassium contributes to stem strength and seed development. Hemp is a relatively nutrient-demanding crop given its fast growth rate and biomass accumulation.

Hemp is grown both rain-fed, in regions with adequate seasonal rainfall, and under irrigation elsewhere, with water demand highest during the rapid vegetative growth phase.

Consistent moisture supports even stand development and stem quality, particularly in fiber-type production, where uniformity affects processing efficiency.

Gray mold can affect stems and flower clusters under humid conditions, particularly later in the season, and Fusarium wilt can cause vascular disease and stand loss in susceptible fields. The European corn borer can bore into hemp stalks, weakening them, and aphids are common sap-feeding pests.

Management combines cultivar selection, crop rotation, monitoring, and — where justified and permitted — locally authorized control products applied according to their labels.

Fiber hemp is typically cut and, in many systems, field-retted before baling, while grain hemp is combine-harvested once seed has matured; dual-purpose systems sequence grain and fiber harvest to recover both products from the same crop.

• Bast fiber for textiles, cordage, and technical nonwoven products
• Woody hurd (shiv) used in construction materials such as hempcrete and insulation
• Seed pressed for oil used in food and industrial applications
• Seed meal used as animal feed after oil extraction