Plantel Nurseries in Santa Maria will be expanding by 36.7 acres and plans to add 13 greenhouses, a germination building and will eventually hire 10 more employees.  Plantel produces about 2 billion plants annually with distributions from Monterey through Ventura Counties with customers in the San Joaquin Valley and in several western states.  Celery is the biggest seller with broccoli, cauliflower, cabbage, peppers and lettuce close behind.  The plantel Nurseries lot currently covers 137 acres.  The County Planning Commission recently unanimously approved the expansion