When sowing seed, they use special tools that allow them to plant seeds individually at a fairly efficient rate. As every gardener knows, fine seed is a problem. It's difficult to sow evenly.
Tracey mentioned that she and Tom have discovered pelleted seeds, which are sold with each seed covered in a small bead of clay, making the tiniest seeds easier to handle. This may work well for the home gardener. Larger seeds are still planted in the traditional way, as they are not as difficult to see, or to plant.
The ground in the gardens is prepared prior to planting with mulch, made up of compost, peat, ground limestone, and fishmeal.