Sunn Hemp – Crotalaria Juncea L. The intermediate crop that enriches the soil with 60-140 kg / ha of nitrogen!

Crotalaria Juncea L. is promoted here under the name Sun Hemp and is an intermediate crop that can offer multiple benefits on a farm. Legumes not only enrich the soil with nitrogen, but also help build a better structure, fight weeds and pests, and favor pollinators. Furthermore, Crotalaria Juncea L. is also a forage plant that provides 4 crops per year or can be grazing directly in the field.

Growers interested in Crotalaria culture can obtain more information about this culture by emailing or calling us at +359879690322 to give you the contact details of the seed supplier. You can also find additional information on the website

Sunna cannabis or Crotalaria Juncea L. is a multifunctional leguminous plant grown in many countries as a green manure, as a soil improver (medium cover crop), to combat grain diseases or to rotate other crops. Sunn Hemp is also used for nutrition and biofuels.

Crotalaria juncea is a perennial, herbaceous, tua-type plant with an erect stem, leguminous plant reaching a height of 1-4 m (60-90 days). It has a highly developed fibrous root system.

The stems are up to 2 cm in diameter, cylindrical and ribbed. The leaves are spirally arranged on the stems, hairy, simple of oblong or elliptical shape, 4-13 cm long x 0.5-3 cm long.

The seeds are heart-shaped, 6 mm long, dark brown to black. The number of seeds / kg is variable and is about 25,000.

Crotalaria Juncea L. culture.

Sunna Hemp Culture – Crotalaria Juncea L: Use

Sunn Hemp can be grown as forage, as green manure in early flowering stage, for intermediate cover crop immediately after harvesting of wheat, barley and canola.

Fresh green mass can be used as a source of protein to supplement low-quality feed. Raw seeds are toxic and cannot be fed to livestock without prior treatment.

Sunn Hemp – Crotalaria Juncea L: Growing Conditions

Crotalaria juncea is a drought-resistant species and can grow with an average annual rainfall of only 20 mm. Crotalaria juncea does well in a wide variety of soils provided they are well drained. It does not tolerate excessive moisture.

A neutral pH range is preferred, but can be grown in soil with a pH between 5 and 8.4 where phosphorous is present.

Sunn Hemp – Crotalaria Juncea L: Creating Culture

Sunn Hemp culture is created on weed-free land. The seeds can be sown by scattering them or one can choose to sow in rows. The density of sowing depends on the purpose of creating the culture and the location.

The best time for sowing is when the soil temperature is 18°C, and late spring/summer (June-July) is recommended as the sowing period. In late fall, Sunn Hemp is a frozen crop.

Sowing depth of seeds of Crotalaria Juncea L. is 2-2.5 cm, seeding rate 17-23 kg / ha, higher if grown for fodder – 30-35 kg / ha. If a mixed crop is chosen, then the seeding rate is 5-7 kg / ha, and it is better to plant Crotalaria Juncea L. with Sudan grass, peas, turnip, buckwheat or oats.

Sunna cannabis seeds germinate in 3 days if they take advantage of favorable conditions. The crop is characterized by rapid growth that suppresses weeds by shading them once they reach a sufficient height and by allelochemicals released from the roots.

The introduction of fixed nitrogen into the soil by Sunn Hemp – Crotalaria Juncea L. is significant

Sunn Hemp – Crotalaria Juncea L: Contributing to soil fertilization

Crotalaria juncea can fix about 60-140 kg nitrogen/ha in 60-90 days after planting.

It provides 60 kg N/ha to soil when used as green manure.

Sunn Hemp has the ability to improve soil properties by accumulating organic matter and releasing soil carbon.

Can be used to rejuvenate the soil, Sunn Hemp is also a recommended crop for the No-Till Technology.

Sunn Hemp – Crotalaria Juncea L. In Crop Rotation

Sunn Hemp is a crop that can be easily incorporated into a farm’s crop rotation.

Here are some examples of rotations that Sunn Hemp could include:
Wheat – Sunna Hemp – Rapeseed (OSR)
Barley – Sunna Hemp – Rapeseed
Barley – Sunna Hemp – Wheat
Canola – Sunna Hemp – Wheat
Rapeseed – Sunna Hemp – Barley
Wheat – Sunna Hemp – Wheat (wheat yield increase 10-15%)
Wheat, canola, barley, barley, rye – sun hemp – corn, sunflower, soybean, spring barley

Bales of Crotalaria Juncea L.
Goats grazing on the farm of Crotalaria Juncea L.
Beef cows grazing on the Sunna hemp farm – Crotalaria Juncea L.

Sunn Hemp – Crotalaria Juncea L: Forage harvest

Crotalaria juncea for forage can be harvested 4 times, starting 6-8 weeks after sowing and then every 4 weeks. Sunna hemp should be mowed for hay in the early flowering stages, 1.5-2.5 months after sowing.

Dry matter content between 30.6 and 32.4%

Benefits of growing Sunn Hemp – Crotalaria Juncea L. including soil fertilization and pollinator support

Sunn Hemp – Crotalaria Juncea L: Culture Advantages

Sunn Hemp has many advantages that make it worth including in your farm planting scheme.

  1. Natural fertilization. Sunn Hemp effectively makes nutrients available deep into the soil, making them available in the root zone for subsequent crops, improving yields.
  2. Reducing soil erosion. The crop’s extensive root systems cling to the topsoil, creating an internal shield against erosion, while overgrowth reduces wind and water erosion.
  3. Nitrogen source. Legumes produce additional nitrogen (N) by converting atmospheric nitrogen into nutrients that plants can use. Sunn Hemp can stabilize the amount of 60-140 kg nitrogen/ha in the soil.
  4. It prevents soil compaction. Deep plant roots penetrate into compacted soil, improve aeration and water circulation, and help soil organisms thrive.
  5. Fights weeds and pests. Sunn Hemp creates competition for winter weeds and other weeds, shading them and preventing them from growing, thus reducing weed load.
  6. Pest control support. While suppressing weeds, Sunn Hemp can also reduce nematode numbers by causing eggs to hatch prematurely.
  7. source of nutrition. Sunn Hemp has the added advantage of being a dual-use crop: it provides a benefit to the carpet crop and can also be a valuable source of animal nutrition.
  8. The habitat of pollinators. Sunn Hemp creates an environment to protect wildlife and pollinators, contributing to biodiversity.
  9. source of organic matter. As Sunn Hemp plants grow, die and decompose, they contribute to the carbon layer in the soil, improving the quality of the substrate and its ability to hold water.
  10. Develops the structure of the soil. Growing sunnah hemp roots aid in the development of fungal hyphae, which leads to the formation of soil aggregations that act as a network that captures organic matter and soil particles. Aggregate stability builds soil structure that leads to better circulation of nutrients, water and oxygen.
  11. Maintain soil moisture. By converting soil energy into growing biomass and opportunity for organic matter, soil moisture increases while reducing runoff and evaporation from extreme weather events.
  12. Additional income. The above benefits create the opportunity to improve the yield potential of cash crops, lower initial costs, and ultimately raise land value. Excellent start without even, from even strip, without even (conservative agriculture).

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