Is it okay to graft my vines in spring?

You would graft into each stitch as it is, purlwise for garter and knit for stockinette.

If you are doubling the thread, pick up the loop - either from a purl "bump" or from the knit section, and try it from there. I've never done this...

It is possible to bring the cast on edge to the row being knit and simply knit the cast on and the live stitch together. This will eliminate having to...

Yes, you can. Just follow the regular grafting procedure, and your vines will flourish!

Just cut below the bark to remove the bud, barely cutting into any wood. Try not to cut into the pith or heartwood of the branch. Select a relatively same-sized...

Grafting is often done to produce fruit that is "true to form." If you find a tree that produces the best fruit you've ever had, planting its seeds may not...

No. You can generally only graft between members of the same genus. Apples can often be grafted to quinces, or even pears, but not to stone fruits.

You can purchase them all year, but they're more usable at a particular time of year when they're malleable. Otherwise, they can dry out and become stiff. Whenever something's in...

That's the traditional way of training grapes, but it actually doesn't matter. You could drape one of the arms of the "Y" along a lower wire and the other arm...

Yes, to both questions. Aeration twice a year (with soil more dry than moist) and leaving the plugs to naturally break down will help greatly. Top dress with a light...