I remember standing in the middle of a high-end garden boutique three years ago, staring at a wrought-iron trellis that was listed for four hundred and fifty dollars. It was beautiful, heavy, and completely out of my budget. I went home and looked at my vegetable patch, which at the time consisted of a few sad-looking tomato plants leaning against some flimsy bamboo stakes I had bought for five dollars. The stakes were bowing under the weight of the fruit, and the whole garden looked messy and amateur. I wanted that “estate garden” look, but I only had twenty dollars…