Seed plates are available with different hole sizes depending on the size seed you are planting. If you plant many different kinds of seeds, you will need several different seed plates. We offer several standard sizes but can make seed plates with virtually any hole size (up to 8mm) based on your particular needs. This seeding system works best with round, uniform seeds although it can be used with seed as irregular in shape as beet and chard seed. Tiny seed is not compatible with this seeding system.

Micro green growers like to use the larger hole sizes 6.5 and 8.0mm to seed flats. Simple and fast!

Every-other-hole seed plates are available to enable you to seed your paper chain pots to get double the in-row spacing (12 inches for LP303-15 paper pots and 8 inches for LP303-10 paper pots).

2.0mm to 2.5mm. These are the smallest practical hole size for small seed, including brassicas

2.8mm: Recommended for alliums, larger-seeded brassicas and other small seed.

4.0mm: Recommended for pelleted lettuce, small-seeded varieties of spinach and beets, cilantro, and other seed that is approximately 3.5 to 3.9mm in size.

4.5mm: Some growers using pelleted lettuce seed prefer a 4.5mm hole over the 4.0mm hole. Will also work for many varieties of spinach and beets.

5.0mm: Recommended for larger seeder varieties of spinach and beets, seeding alliums in bunches.

6.5 or 8.0mm: Recommended for seeding flats of micro greens!

NOTE: the seeder does not handle tiny seed well. Tiny seed can get caught between the two layers of plastic.

If you special needs in terms of seed plates, we can make just about anything you need, include different hole sizes and using different thicknesses of material to result in shallower or deeper holes. Custom seed plates can typically be made and shipped within 7-10 days.

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