If you've ever purchased commercially made garden or flower seed mats, you may have been disappointed a time or two when only a few of the plants grew well. Usually, the failure of garden seed mats has to do with the types of seeds placed together. To make a garden seed mat that actually grows well, you'll need to choose complementary plants. The best time to make your garden seed mat is in the late autumn or winter.
Decide what kinds of vegetables or herbs you want to grow in your garden. Purchase seeds at your local garden store, or if you saved seeds from last year's garden, you can use those. Choose herbs and vegetables that have similar growth rates, heights, water and sunlight needs, and compatibility for companion gardening. Plant size is a big factor. Ensure that the plant types you select are around the same height so the taller vegetables don't steal all the sunlight, leaving the shorter-growing ones deep in the shade.
Unroll and tear off a length of heavy-duty brown paper towels. You can make whatever length you like and even use several lengths of paper towels to create a wider seed mat.
Mix a thick paste using 1 part water to 2 parts flour. Spread the paste over the length of brown paper towels.
Place the seeds in the paste, spacing them the appropriate distance for each type of seed. Allow the mat to dry completely. Then, roll up the mat, label it and store it until spring.
Prepare your garden bed when the last expected frost has passed and the springtime soil has warmed to at least 50 degrees Fahrenheit. Turn and loosen a patch of soil that's in full sunlight in your garden or yard using a pitchfork. Remove any weeds, grass or other debris from the soil.
Unroll your garden seed mat and lay it out on the prepared garden bed. Spread a cover of organic compost over the seeds, about 1-inch thick, depending on the types of seeds you're planting, or to the depth recommended on your seed packets. Water your newly-planted garden well.