planting the fruit trees and stirring up bordeaux mixture , the first strawberries , mulching and tending the asparagus beds , building the greenhouse onto the barn , experimenting with different kinds of compost bins , saving seeds , building the sunroom on the house for marges studio , the pain of overhearing walter and arthur complain to marge about their neanderthal lifestyle , the boys leaving for vanderbilt , walter first , and arthur the next year .