Each cup holds 25 plants, with 300 plants on a tray. The tiny plants live in the small cups until they are big enough for potting in plastic trays. The potting mix is a blend of perlite and peat soil. The family-owned Duarte Nursery boasts that it is the largest permanent crop nursery in the United States, yet their nursery stock never sees the ground until being planted by a grower. The nursery, based in Modesto, California, began propagating grape stock about 20 years ago and was the first in the grape industry to market potted, bench-grafted grapevines, said Jeff […]