““Through the years I experimented with all different types of materials and frames. Finally, I settled upon one that was so simple, easy, and inexpensive to use that it was almost ridiculous. Then I began growing all different types of plants vertically. I originally thought I would need to design some special way to hold up and accommodate heavier fruits such as winter squash and pumpkins, but as it turned out, these plant vines seemed to understand the situation; the stem supporting the heavy fruit grows thicker and heavier as the fruit becomes larger. If you have a framework and support that will hold the plant, the plant will hold the fruit; it is as simple as that! Mother Nature always seems to know best. Pea and bean netting can be stretched taut across a box frame and held in place by four metal posts. Plants will then grow up through the netting and be supported. Best Material I use the strongest material I can find, which is steel. Fortunately, steel comes in tubular pipe used for electrical conduit. It is very strong and turns out to be very inexpensive. Couplings are also available so you can connect two pieces together. I designed an attractive frame that fits right onto the 4 × 4 box, and it can be attached to the wooden box with clamps that can be bought at any store. Or, steel reinforcing rods driven into the existing ground outside your box provide a very steady and strong base; then the electrical conduit slips snugly over the bars. It’s very simple and inexpensive to assemble. Anyone can do it—even you! To prevent vertically grown plants from shading other parts of the garden, I recommend that tall, vertical frames be constructed on the north side of the garden. To fit it into a 4 × 4 box, I designed a frame that measured 4 feet wide and almost 6 feet tall. Tie It Tight Vertically growing plants need to be tied to their supports. Nylon netting won’t rot in the sun and weather, and I use it exclusively now for both vertical frames and horizontal plant supports. It is very strong—almost unbreakable—and guaranteed for twenty years. It is a wonderful material available at garden stores and in catalogs. The nylon netting is also durable enough to grow the heavier vine crops on vertical frames, including watermelons, pumpkins, cantaloupes, winter and summer squashes, and tomatoes. You will see in Chapter 8 how easy it is to train plants to grow vertically. To hold the plants to the frame, I have found that nylon netting with 7-inch square openings made especially for tomato growing works well because you can reach your hand through. Make sure it is this type so it won’t cut the stem of the plant when it blows against it in the wind. This comes in 4-foot widths and can easily be tied to the metal frame. It’s sometimes hard to find, so call around.””
