It were unfair to suspect that the exigencies of sprightly writing had carried Walpole beyond the bounds of accuracy in his description of the stiff-garden as he knew it, for things were in some respects very bad indeed. At the same time he is so engrossed with his abuse of old ways of gardening, and advocacy of the landscape-gardener's new-fangled notions, that his account of garden-craft generally falls short of completeness. He omits, for instance, to notice the progress in floriculture and horticulture of this time, the acquisitions being made in the ornamental foreign plants to be cultivated in the open ground, the green-house, and the stove. He omits to note that Loudon and Wise stocked our gardens with more than giants, animals, monsters, &c., in yew and box and holly. Because the names of these two worthies occur in this gardening text-book of Walpole's, all later essayists signal them out for blame. But Evelyn, who ranks as one of the three of England's great gardeners of old days, has a kindlier word for them. He is dilating upon the advantage to the gardener of the high clipped hedge as a protection for his shrubs and flowers, and goes on to particularise an oblong square, palisadoed with a hornbeam hedge "in that inexhaustible magazine at Brompton Park, cultivated by those two industrious fellow-gardeners, Mr Loudon and Mr Wise." This hedge protects the orange trees, myrtles, and other rare perennials and exotics from the scorching rays of the sun; and it equally well shelters the flowers. "Here the Indian Narcissus, Tuberoses, Japan Lillies, Jasmines, Jonquills, Periclimena, Roses, Carnations, with all the pride of the parterre, intermixt between the tree-cases, flowery vases, busts, and statues, entertain the eye, and breathe their redolent odours and perfumes to the smell." Clearly there is an advantage in being a gardener if we write about gardens (provided you are not a mere "landscape-gardener!").
One cannot deny that Horace Walpole did well to expose the absurd vagaries which were being perpetrated about his time under Dutch influences. Close alliance with Holland through the House of Orange had affected every department of horticulture. True, it had enriched our gardens and conservatories with many rare and beautiful species of flowers and bulbs, and had imbued the English collector with the tulip-mania. So far good. But to the same source we trace the reign of the shears in the English garden, which made Art in a Garden ridiculous, and gave occasion to the enemy to blaspheme.