Grafting is a fairly straight forward process, you don’t need many tools, but specific ones. Basically a sharp knife, or knives, depending on what kind of grafts you’re doing. I love tools so I try to use good quality and try to have what I need. If you’re only going to do a few grafts then using and/or modifying what you have may be the most prudent, rather then spend money on something you may not use again. Below is a picture of what I use when I graft.
Starting with saw, used to cut the tree (if the tree is bigger then a lopper could handle, or to not tear a branch up too much with a lopper). Some times a chain saw is in order if the tree is bigger, although you can cut a biggish tree with the hand saw, it makes for a much cleaner cut. Once again depending on how much there is to do and how much energy you care to or can put out. Then the loppers and hand shears, basic pruning tools used to clean branches out of the way and the hand cutters for the same and cutting scion wood to size, and useful all the time for work besides grafting. The tape we use is ‘grafting tape’, but it’s basically a vinyl tape. Some people use tape with adhesive which will work, some also use black electrical tape, which I discourage because of the excess heat generated by it in the heat of summer. I like 3/4″ or 1/2″ width, but sometimes it comes down to what you can find. The green nursery tape is widely available and works well. Basically you’ll be wrapping the cuts with the tape to cinch the grafts together and to keep the cut from drying out and to keep moisture and contaminants out as well. The yellow paint is also used to seal in and seal out, traditionally a wax mixture was used, but we’ve found it difficult to keep it in the cut during the heat of summer, and not too easy to apply. We use Farwells Grafting Seal, available at nursery supply, hardware stores or on line. It washes off with water when still wet, but when it dries it’ll stick for years (don’t wear your best cloths when applying!) Not shown is a sharpening stone. It’s important to keep a keen edge on your blades, for ease of cutting and to keep tissue damage (on the scion wood) to a minimum. I prefer water stones over oil stones (oil and water refer to the liquid used to float the steel particles off the stone), my favorite are combination 1200 and 4000 or 6000 grit water stones (wood working supply houses).
On to the knives: Having worked as a professional grafter I ended up making my own knives to suit my needs and because I couldn’t find what I wanted commercially. They are made from a old cross cut saw blade (the ones you might see with a painted mountain scene on it in a rural cafe) it’s good steel which holds a edge well. Short of that there are other options: Victorinox (Swiss Army Knife) makes a grafting knife which is the economical alternative to the Tina brand knife. I love my swiss army knife and carry it everywhere I go but the blade doesn’t hold a edge very well, it’s made from stainless steel. The Tinas on the other hand use a high carbon steel blade which holds and edge well, but is prone to tarnish and rust if not cared for. I recommend the Tina, but they are at least twice the price. In the pic above, from left to right are a folding Tina knife, my homemade and another modified knife used as a bark grafting knife (I’ll explain it’s use in a future post).
A few blade details: Most knives have what is called a double bevel. That is the angle that makes the edge of the blade which slopes in from both sides of the body of the blade to the cutting edge as shown below in the above image. It works well for cutting vegetables, whittling and whatever else you may need to cut with a knife. But for a grafting knife a single bevel makes the work much easier, it facilitates a smooth flat cut on the scion wood. As shown above, it’s the same bevel that chisel has, a single slope coming from the top of the blade to the cutting edge. On a grafting knife, the top of the blade depends on whether you are left of right handed. I am right handed, and looking at the blades in the photo above shows them from above, with the bevel sloping down on the left side of the blade. For a lefty, if the knife was flipped over, the slope would go from the top to the right edge.
Next post we’ll start grafting.