Hmmm, I think someone left out the secret ingredient in the recipe for grafting. Viz temperature and humidity and shelter for grafted plants . Probably a closed controlled environment would be used by a commercial grafter.
Sure this is true but I have top worked a plum tree in my home orchard out in the paddock surrounded by curious wallabies. I changed it from a mariposa plum to a multigrafted gulf gold with one branch of gulf ruby to pollinate it. I am thinking of adding a branch of yarrahapinni this winter just to add a bit of colour.
In my experience of grafting (apples, pears, stone fruit, chestnuts, walnut and citrus) only the walnuts required special care.Just about everything else can be field grafted with close to 100% take.I had less than 50% success with walnuts, so after consulting the literature - pre-internet days - it appeared that high temperature and high humidity were a successful combination in near coastal areas of Texas/Mexico.I insulated a large packing crate and put a thermostatically controlled heater inside. Walnut scions were bench grafted to black walnut stock (juglans nigra) and each plant was individually packed into a closed plastic bag with wet peat moss worked around the roots. These bags were packed into the propagation box and the temperature set at 32 degrees C.Two weeks later, 100% take. This was not a commercial set up, just a means of propagating a couple of dozen walnut trees to plant out on the farm in southern NSW. That was 25 years ago.I may revive the idea again with finger limes. They are difficult (read expensive commercially) to propagate, with a relatively high failure rate compared to other citrus. I hope this is of value to someone.Chris BourkeTamborine Village.
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