Greenhouse Humic Acid Granules 70% Low EC Organic Amendment for Pre Plant Bed Preparation

Protected cropping has a constraint that open field growers do not face: the soil is never leached by rainfall, so salts accumulate and organic matter is consumed season after season without replacement. After three or four tomato or pepper cycles in the same plastic house, growers in Chiang Mai, Dalat and Lembang report hard, compacted beds, poor water infiltration and rising EC in the root zone.

This granule is applied at bed preparation, not during the crop. One hundred to two hundred grams per square metre incorporated into the top 15 cm before the beds are formed rebuilds organic matter and structure, and because the product contributes less than 0.2 mS/cm of EC at the recommended rate, it does not add to the salt load the way compost or manure can. That EC figure is the reason greenhouse growers choose a granule over a manure based amendment.

• Low EC load: Contributes under 0.2 mS/cm at the recommended rate, which matters where salts cannot be leached by rain.
• Built for bed preparation: Applied and rotavated before planting, when the soil structure decision is still open.
• Repeats safely: Suitable for every second cycle in continuous cropping houses without salt accumulation.
• Substrate option: 2-3 kg per cubic metre works in coir and perlite systems as well as soil beds.
• Consultant specification: EC data and a bed preparation schedule supplied for house package specifications.
• Own brand possible: Bag artwork can carry the greenhouse supplier's brand for projects under their name.

Apply 100 to 200 g per square metre and rotavate into the top 15 cm, fourteen days before transplanting, then irrigate to settle the bed. For continuous cropping houses, apply every second cycle. It can be combined with a sterilisation step, but leave seven days between the two. On coconut coir or perlite substrate systems, use 2 to 3 kg per cubic metre of media instead of field application.

Greenhouse technology suppliers and protected cropping consultants in Thailand, Vietnam and Indonesia are the main channel, and they usually specify the product in their house package rather than sell it separately. A 20ft container carries 22 tons. We provide an EC contribution test result and a recommended bed preparation schedule, and we can print the consultant's own brand on the bag for projects delivered under their name.

Packing is 25 kg PP woven bag with PE liner, 10 kg bag, or 1 ton jumbo bag. Each lot is tested for humic acid, moisture, pH, solubility and EC contribution, and retained samples are kept 24 months. Production follows ISO 9001 procedures and shipments include COA and MSDS as standard.