Post-Harvest Losses Are Stealing 30% of Kenya's Food — Here Is How Farmers Can Fight Back

Kenya produces enough food to feed itself. But between harvest and the consumer's plate, roughly 30% disappears — to rot, pests, poor handling, and delays. For a country where millions face food insecurity, this is not an abstract statistic. It is a solvable problem.

Where the losses happen

Post-harvest loss in Kenya happens at five points: maize harvested too early or too late, fruits bruised by rough handling, inadequate threshing that damages grain, poor drying that leads to aflatoxin contamination, and transport without cooling on roads that take too long. Most farmers know the first two. The others receive far less attention.

The aflatoxin problem is severe

Kenya has one of the highest rates of aflatoxin contamination among Africa's maize-producing nations. The Kenya Bureau of Standards (KEBS) enforces a maximum of 10 parts per billion in grain for human consumption. Contaminated batches are rejected by millers and cannot be sold.

The cause is almost always the same: harvesting before grain is fully dry, then storing it before moisture drops below 13.5%.

The solution is straightforward: dry your grain on raised platforms rather than on the ground, test moisture before storage, and use PICS bags or metal silos for storage rather than open woven sacks.

Hermetic storage — the most important tool most farmers don't use

A hermetic bag costs between KES 80 and KES 120. It is an airtight plastic liner inside a standard grain bag. It cuts oxygen supply to near zero, killing grain weevils without chemicals. Grain stored correctly in hermetic bags retains full market value for 6 to 12 months.

Metal silos, which cost KES 6,000 to 15,000 depending on capacity, are an even better long-term investment. Several NGOs and government programmes subsidise these for smallholders.

Refrigeration for fruit and vegetables

For horticultural producers — tomato farmers in Kirinyaga, capsicum growers in Nyeri, mango farmers in Makueni — cold storage is the central challenge. Without it, tomatoes last 2 to 3 days at ambient temperature. With refrigeration, they last 2 to 3 weeks.

Village-level solar cold stores have been deployed in several counties under the Kenya Horticultural Development Programme. Contact your county agriculture office to find out if one is accessible to you.

What this means on Agrisoko

When you list on Agrisoko, accurate post-harvest handling makes a difference to what buyers will pay. Graded, well-stored produce listed with quality information attracts better-quality buyers. The work you put in after harvest shows.