Why it is worth the effort
Every tomato that goes in the bin was paid for twice: once to buy it and once in the time spent storing, sorting and throwing it away. In a kitchen buying fresh produce every week, a little waste each day adds up to real money by the end of the month.
It is a national problem too. Kenya’s 2024–2028 postharvest strategy cites an estimated KSh 72 billion lost each year in selected crop value chains, and World Resources Institute research from 2025 cites an estimate of 30 to 40% of food lost or wasted between production and consumption. Kitchens are the last link in that chain. We set out these figures and their sources on our impact page.
Start by measuring the bin
You cannot cut waste you have not seen. Kitchens that guess usually guess wrong: they blame the supplier when most of the waste is overproduction, or blame portions when most of it is spoiled greens.
For one normal week, sort and weigh what you throw away.
| Bin | What goes in it | What it tells you |
|---|---|---|
| Spoiled | Stock that went off before it was used | Ordering too much, or storing it in the wrong place |
| Prep trim | Peels, stems, cores and offcuts | Prep habits, and which trim could be used |
| Overproduction | Food cooked or prepped but not sold | Forecasting and batch sizes |
| Plate waste | Food left by customers | Portion sizes and dishes people do not finish |
A kitchen scale, four labelled buckets and a sheet on the wall are enough. Write the weight of each bin at the end of every shift. After a week, the biggest number tells you where to start.
Order closer to use
The cheapest way to cut spoilage is to hold less stock. Split your produce into two kinds of order.
Weekly order
- Onions, potatoes, carrots
- Cabbage, ginger, garlic
- Firm fruit that ripens on the shelf
Two or three times a week
- Sukuma, spinach, managu, terere
- Dhania, mint and other soft herbs
- Ripe tomatoes, berries, cut fruit
Order from your covers, not from habit. Look at last week’s sales for the same day, adjust for events and holidays, and order to that number with a small buffer. Check this week’s prices as you plan: when an item is expensive, plan dishes that need less of it.
Wapishi delivers at times agreed with you, with early-morning and night deliveries on request, so fresh items can arrive just before prep starts. Order in the Wapishi shop. The minimum order is KSh 5,000, so pair the greens and herbs with staples you need anyway.
Store it so it lasts
A lot of spoilage is storage. Tomatoes in the cold room go mealy, potatoes stored with onions sprout, and greens next to bananas turn yellow. Our storage guide covers where every item belongs. Three rules do most of the work:
- Right place. Greens and herbs cold, roots and onions dry and dark, ripening fruit on the counter.
- First in, first out. Date every crate, put new stock behind old, keep a “use today” tray.
- Check on delivery. Damaged or warm produce spoils first. Check deliveries before you sign and report problems the same day.
Use more of what you buy
Trim is food you have already paid for. Some of it belongs in the bin. A lot of it does not.
| Leftover | Use it for |
|---|---|
| Onion, carrot, celery and leek trim | Stock. Keep a clean container in the cold room and cook stock twice a week. |
| Dhania and herb stems | Sauces, marinades, green chutney, stock |
| Soft or overripe tomatoes | Tomato sauce, stews, soup bases |
| Overripe bananas, mangoes, pawpaw | Juices, smoothies, banana bread, fruit sauces |
| Broccoli and cauliflower stems | Peel and slice into stir-fries and soups |
| Cooked but unsold rice and vegetables | Staff meals, if they were held safely |
Only reuse food that has been held at safe temperatures. When in doubt, throw it out. Saving a tray of rice is never worth a sick customer.
Plates and portions
If the plate-waste bin is heavy, look at which dishes come back half-eaten. A side of sukuma nobody touches or a mountain of rice is a portion problem, not a customer problem. Try smaller standard portions with refills on request, and ask the waiting staff what customers leave.
What cannot be used
Some waste is unavoidable: peels, cores, spoiled produce. Keep it separate from other rubbish. Clean vegetable and fruit scraps can be composted, and you may find an urban farmer or livestock keeper near you who will take them. Agree what they can use before you start setting it aside.
Check again in a month
Repeat the one-week bin count a month after you make changes. Put the before and after figures where the team can see them. People waste less when they can see the number go down.