Organic buckwheat with an Ecological Certificate, to be harvested in August 2021, sown in a field with an area of 4.5 ha, approx

Organic buckwheat with an Ecological Certificate, to be harvested in August 2021, sown in a field with an area of 4.5 ha, approx. 30 km south of Warsaw. I would like to sell it directly from the field, because I do not have the conditions for storage. Negotiated price. I issue a VAT invoice.