Cow manure is one of the oldest and safest organic fertilisers. Its real value is not the amount of nutrients it contains but the way it improves the soil itself: it helps sand hold water, loosens clay soil, and feeds the beneficial organisms living in it.
But there is a big difference between treated (composted) cow manure and untreated manure, and getting it wrong can bring weeds, pests and diseases instead of benefits.
What is cow manure?
It is cattle dung after decomposition, and it reaches growers in two forms:
Untreated (fresh) cow manure
- Dung straight from the barn, not fully composted.
- Contains weed seeds that will sprout in your soil.
- Can carry pathogenic bacteria and fungi and fly larvae.
- Releases ammonia and heat as it breaks down, burning roots if placed near plants.
- Usually higher in salts.
Treated cow manure (compost)
- Has gone through full composting with high temperatures, or heat treatment.
- The heat kills most weed seeds and pathogens.
- Dark brown, smelling of earth rather than dung.
- Safe to use directly around plants.
Benefits of cow manure for soil and plants
- Raises soil organic matter, which matters most in sandy soil.
- Increases water-holding capacity, so you irrigate less.
- Improves aeration in heavy soils.
- Feeds plants slowly and gradually with no risk of burning.
- Activates beneficial microorganisms that help roots take up nutrients.
- Makes chemical fertilisers more efficient, because the soil holds them instead of losing them with water.
How much cow manure to use
These rates come from the Black Cow treated cow manure label:
- Gardens and house plants: 2 to 5 kg per square metre, mixed into the soil.
- Raised beds and pots: 20 to 30% of the soil volume.
- Fruit trees: 5 to 15 kg per tree depending on age and size.
- Date palms: 30 to 50 kg per palm.
- Field preparation: 20 to 30 kg per 100 m² before planting.
- Greenhouses: mixed into the planting rows before transplanting.
Repeat every 2 to 3 months according to the plant's needs.
How to apply cow manure
- Spread it around the root zone, not against the trunk.
- Work it into the soil lightly; do not leave it on the surface.
- Water straight after so it starts breaking down and reaches the roots.
- Best timing: before planting, at the start of the season, or during winter maintenance of trees and palms.
Cow manure or poultry manure?
- Cow manure: milder and safer for roots, and better at improving soil structure.
- Poultry manure: richer in nitrogen and stronger, but "hot", with a higher risk of burning and salinity if not treated.
More in our poultry manure article, and the full picture in our organic fertiliser article.
Is cow manure enough on its own?
No. Its nutrient levels are low compared with chemical fertilisers. It is a foundation for improving soil, and plants still need a feeding programme for their growth stage, especially at flowering and fruiting. See our agricultural fertilisers article.
Common mistakes with cow manure
- Using fresh dung: brings weeds and flies and burns roots.
- Placing it against the stem or trunk: causes rot at the crown.
- Leaving it on the soil surface: it dries out and loses much of its value.
- Overdoing it in pots: raises salinity and makes the soil heavy.
Products from Orkida
- Black Cow treated cow manure 25 kg
- Humintech Perl Humus Pro granular humic
- Kelpak seaweed extract for roots
Cow manure FAQs
What is Black Cow fertiliser?
A brand of treated cow manure (natural compost) made from decomposed, heat-treated cattle dung, used to improve soil and feed plants gradually.
Does cow manure smell?
Treated manure has a mild, earthy smell. A strong smell means it has not fully composted.
Can I use cow manure for indoor plants?
Yes, if it is treated, in a small proportion mixed with ready-made potting soil.
How soon does cow manure show results?
Soil improvement shows within weeks, and the clear difference in plant growth comes with regular use through the season.