Custom Mylar Seed Bags

Seals, Zips and Tear Notches

The seal is where moisture gets in, so it matters as much as the film. A heat seal across the top after filling closes the bag fully. Above the heat seal, a resealable zip lets customers close the bag again after the first opening, and a tear notch makes it easy to open the heat seal neatly without scissors.

For long-term storage, many seed savers add a small desiccant sachet before sealing to absorb any remaining moisture. If you plan to do the same, allow a little extra space in the bag.

A hang hole at the top lets seed bags hang on peg displays in garden centres and hardware shops.

Place the tear notch just above the heat seal and below the zip, so the bag opens cleanly and still reseals afterwards. Plain heat-sealed versions without a zip are covered under heat-seal mylar bags for single use.

Printing Mylar Seed Bags With Variety Details

Seed packets are as much about information as branding. Gardeners want to know the variety, a picture of the plant, when to sow, how deep, how far apart and when to expect a harvest or flowers. The front usually carries the variety name and an image; the back carries the growing guide.

Full colour printing reproduces photographs and illustrations well on mylar. A matt finish reduces glare and gives a softer, natural look; gloss makes colours vivid. Kraft-lined bags print best with bold colours and simple illustrations.

If you sell many varieties, a consistent layout with a changing photograph and name keeps the range recognisable. We can print several designs in one order, and leave a blank area for lot numbers or packing dates if they change.

Filling and Sealing Seed Bags at Home or in the Shed

Most small seed businesses pack by hand, and a few habits make a big difference to how well the bags perform. Make sure seeds are properly dry before packing; sealing damp seed into a barrier bag traps the moisture inside rather than keeping it out. Pack on a dry day, or in a room away from kettles and washing, and work in small batches so open bags are not left sitting about.

A small funnel or a folded card scoop keeps seed out of the seal area. Even a few grains caught in the seal can stop it closing fully, so wipe the inside of the top edge before sealing. A simple impulse heat sealer, the kind used for food bags, closes mylar pouches cleanly; test the temperature on an empty bag first, as too much heat can wrinkle the film.

Label each bag as you go, or print the lot number area before packing, so varieties cannot get mixed up. Store finished bags in a cool, dark box until they are sold or posted. If you sell at markets, a small display box keeps the packets upright and out of direct sun on the stall. The simplest flat version for samples is covered on the flat mylar bags for seed samples page.

Choosing a Bag Size

Measure the volume of seed per packet rather than its weight, because seed sizes vary so much. A few grams of tiny flower seed fits a small pouch, while the same weight of beans needs far more space. Fill a sample bag or a measuring cup with your seed quantity and allow room above it for sealing and a zip.

Think about how the bag will be displayed too. Small flat pouches suit seed racks and envelopes for posting; stand-up pouches suit shop shelves and bulk sales. If you post seeds, a flat pouch keeps postage low.

Mixed collections, such as a salad selection or a cutting garden set, can go in a larger pouch with several small sachets inside, each printed with its own variety name.

Dry the Seed Fully Before Choosing a Zip

A foil bag only helps seed that goes in dry. Seed sealed with residual moisture sweats inside the barrier and does worse than it would in a paper packet, so check your drying before you choose the bag, and if customers will open and reclose the packet across a sowing season, specify a zip above the heat seal. For seed sold once and sown at once, a plain heat-sealed pouch with a tear notch is cheaper. Weigh the fill per variety and tell us how many varieties, as each is a print version.

Send the bag style, the size, the quantity and your designs, and a custom quote comes by email within one working day, with minimums low and quoted per job and plain pouches from £0.25 each. Printed orders come with a free design proof. Bags are produced in 4 to 7 working days after approval and delivered free and tracked to UK mainland addresses in 2 to 3 working days; bags with split seals, misprints or other damage are reprinted or refunded if reported within 10 days. Varieties that sell on the look of the seed use the mylar bags with a clear window.