Produce Packaging for Market Sales: Clamshells, Bags and Boxes

Use clamshells for soft, easily crushed items you sell by the pint or pound, bags for sturdy or bunched items that tolerate being squeezed, and boxes or trays for anything that travels in bulk or stacks on a table. Vents matter more than the shape: a container that traps moisture can ruin a good crop in a day. The right pick depends on the crop, the route from the packing area to the stall and how the customer carries it home.

This guide covers the packaging equipment for market and CSA packing. It makes no claims about shelf life or food-safety rules, which vary by crop and by place. For labeling, weights and food-contact materials, check the listing, the maker's notes and your local rules.

Start with how the crop is sold

Before you compare containers, write down three facts about each product: how it is sold (by count, by weight or by the bunch), how fragile it is and how long it spends in transit. A crop sold by the pint wants a fixed-volume container. A crop sold by the bunch needs only a band or a bag. A crop that bruises needs something rigid.

Then think about the customer. A market shopper carries a bag or basket and wants a package that holds shape for an hour. A CSA member gets a box and wants everything to arrive in the state you packed it. Those are different jobs, and one container rarely does both well.

Clamshells

Clamshells are hinged, lidded containers. Their strength is protection and display: the product is visible, the walls resist crushing and the lid snaps closed. They stack neatly in a cooler or on a table, and a fixed size makes it easy to portion consistently.

• Vent pattern: check that the vents are open enough for the crop. Berries and cherry tomatoes are the usual users, and a clamshell with few vents holds moisture against the fruit.
• Lid latch: a loose latch means the lid pops open in a bag. Try opening and closing a sample many times before you buy a case.
• Food-contact wording: check the listing for a food-contact statement and the material. Recycling depends on your local program, so do not promise customers a particular disposal route.
• Size by volume: pick a size by the volume you will actually sell, not the name on the case.
• Stack height: check that filled containers stack without crushing the one below.

Clamshells cost more per unit than a bag, and they take up storage room when empty. Keep a count of what you use in a week so you do not over-order, and write down which size goes with which product so a helper does not have to guess on a busy morning.

Bags

Bags are flexible and cheap, take up almost no storage room and suit crops that do not crush. Leafy greens, salad mixes, herbs, beans and many roots fit in a bag. The two features to check are venting and closure.

• Perforated or vented film: lets moisture out and some air in. A sealed bag with no vent holds moisture, which is a problem for crops that sweat.
• Mesh bags: good for onions, garlic, citrus and similar items that like air around them.
• Paper bags: good for crops that you want to keep dry and for customers who prefer to avoid plastic. Check how the bag handles a damp product.
• Closures: twist ties, adhesive strips, folded tops with a sticker, or a heat seal. The impulse sealer guide covers sealing for small farms.
• Food-contact wording: as with clamshells, look for the maker's statement on the listing.

If you pack dried herbs or dry goods rather than fresh produce, a barrier bag may be the better pick; see the guide to barrier bags and oxygen absorbers. Bag liners for bins are a different product, covered in the bin liner guide.

Boxes and trays

Boxes and trays are for bulk. A CSA share, a restaurant order or a market table display all use them. Cardboard is cheap and printable. Waxed or coated cardboard handles moisture better but may not be recyclable in your area. Plastic returnable crates cost more up front but survive many trips.

• Ventilation holes: check hole size and position. Holes in the sides help air pass through a stack.
• Stacking strength: a box must carry the weight of the box above. Check the maker's notes and test a filled stack before a delivery.
• Lids or flaps: a lid helps in the truck, but the box may need to be opened quickly at the market.
• Dividers or inserts: keep delicate items from rolling. Pulp or foam inserts are common.
• Reuse: if you collect boxes back from CSA members, a rugged option pays off. The vented produce crate guide and the harvest tote guide cover reusable options.

Think about empty storage as well. Nesting crates and flat-packed cardboard boxes take little room between seasons, while rigid clamshells and fixed-shape trays do not. If your packing area is small, the space a container needs when empty can matter as much as its price.

Match containers to crops

The table is a starting point, not a rulebook. Experienced growers in your area, and your local extension service, know which containers suit local crops.

Weigh, label and seal consistently

Packaging is only half the system. Selling by weight depends on a scale that reads the same on every pack, and the bench scale guide covers choices for a packing table. Selling by weight is regulated in many places, so check with your local weights and measures office what scale and labeling you need. This guide takes no position on those rules.

• Fill to a consistent level, not just a consistent weight. Packs that look alike on the table are easier to price and easier to restock.
• Label every pack with the product name and your farm. Check local rules for any other required label text.
• Seal bags and close clamshells the same way each time so customers know what to expect.
• Keep a few spare sizes on hand. A bad day is a day you wish you had a bigger or smaller container.

Frequently asked questions

Sources and verification