Nevertheless he refused to be discouraged and proceeded to plant forty-eight mahogany tree seeds brought by his nephew, George A. Washington, from the West Indies. He also set out a "Palmetto Royal" in the garden and sowed or planted sandbox trees, palmettos, physic nuts, pride of Chinas, live oaks, accacias, bird peppers, "Caya pepper," privet, guinea grass, and a great variety of Chinese grasses, the names of which, such as "In che fa," "all san fa" "se lon fa," he gravely set down in his diary.
The dry weather continued and presently he notes that all the poplars, black gums and pines, most of the mulberries, all of the crab apples and papaws, most of the hemlock and sassafras, and several of the cedars are dead, while the tops of the live oaks are dead but shoots are coming up from the trunks and roots. The Chinese grasses are in a bad way, and those that have come up are almost entirely destroyed either by insects or drought. None of this grass survived the winter, though he took the trouble to cover it with straw.
During the fall of 1785 and spring of 1786 he sowed the lawn with English grass seeds, replaced the dead trees in the serpentine walks and shrubberies, and sent two hundred and fifteen apple trees to his River Plantation. He made the two low mounds already mentioned and planted thereon weeping willows. He set out stocks of imported hawthorns, four yellow jessamines, twenty-five of the Palinurus for hedges, forty-six pistacia nuts and seventy-five pyramidical cypress, which last were brought to him by the botanist Michaux from the King of France. As 1786 was one of the wettest summers ever known, his plants and trees lived better than they had done the preceding year.
During this period and until the end of his life he was constantly receiving trees and shrubs from various parts of the world. Thus in 1794 he sent to Alexandria by Thomas Jefferson a bundle of "Poccon [pecan] or Illinois nut," which in some way had come to him at Philadelphia. He instructed the gardener to set these out at Mount Vernon, also to sow some seeds of the East India hemp that had been left in his care. The same year thirty-nine varieties of tropical plants, including the bread fruit tree, came to him from a well wisher in Jamaica. At other times he sowed seeds of the cucumber tree, chickory and "colliflower" and planted ivy and wild honeysuckle. Again he once more planted pecans and hickory nuts. It can hardly be that at his advanced age he expected to derive any personal good from either of these trees, but he was very fond of nuts, eating great quantities for dessert, and the liking inclined him to grow trees that produced them. In this, as in many other matters, he planted for the benefit of posterity.
In order to care for his exotic plants he built adjoining the upper garden a considerable conservatory or hothouse. In this he placed many of the plants sent to him as presents and also purchased many others from the collection of the celebrated botanist, John Bartram, at Philadelphia. The structure, together with the servants' quarters adjoining, was burned down in December, 1835, and when the historian Lossing visited Mount Vernon in 1858 nothing remained of these buildings except bare walls crumbling to decay. Of the movable plants that had belonged to Washington there remained in 1858 only a lemon tree, a century plant and a sago palm, all of which have since died. The conservatory and servants' quarters have, however, been rebuilt and the conservatory restocked with plants such as Washington kept in it. The buildings probably look much as they did in his time.
One of the sights to-day at Mount Vernon is the formal garden, which all who have visited the place will remember. Strangely enough it seems impossible to discover exactly when this was laid out as it now stands. The guides follow tradition and tell visitors that Washington set out the box hedge, the principal feature, after his marriage, and that he told Martha that she should be mistress of this flower garden and he the master of the vegetable garden. It is barely possible that he did set out the hedges at that time, but, if so, it must have been in 1759, for no mention is made of it in the diary begun in 1760. In April, 1785, we find by his diary that he planted twelve cuttings of the "tree box" and again in the spring of 1787 he planted in his shrubberies some holly trees, "also ... some of the slips of the tree box." But of box hedges I can find no mention in any of the papers I have seen. One guess is about as good as another, and I am inclined to believe that if they were planted in his time, it was done during his presidency by one of his gardeners, perhaps Butler or the German, Ehler. They may have been set out long after his death. At all events the garden was modeled after the formal gardens of Europe and the idea was not original with him.
East of the formal garden lies a plot of ground that he used for agricultural experiments. The vegetable garden was south of the Bowling Green and separated from it by a brick wall. Here utility was lord and a great profusion of products was raised for the table. Washington took an interest in its management and I have found an entry in his diary recording the day that green peas were available for the first time that year. Evidently he was fond of them.
The bent of our Farmer's mind was to the practical, yet he took pride in the appearance of his estate. "I shall begrudge no reasonable expense that will contribute to the improvement and neatness of my farms," he wrote one of his managers, "for nothing pleases me better than to see them in good order, and everything trim, handsome, and thriving about them; nor nothing hurts me more than to find them otherwise."
Live hedges tend to make a place look well and it was probably this and his passion for trees that caused Washington to go in extensively for hedges about his farms. They took the place of wooden fences and saved trees and also grew more trees and bushes. His ordinary course in building a fence was to have a trench dug on each side of the line and the dirt thrown toward the center. Upon the ridge thus formed he built a post and rail fence and along it planted cedars, locusts, pines, briars or thorn bushes to discourage cattle and other stock. The trenches not only increased the efficiency of the fence but also served as ditches. In many places they are still discernible. The lines of the hedges are also often marked in many places by trees which, though few or none can be the originals, are descended from the roots or seeds of those trees. Cedar and locust trees are particularly noticeable.