Does anyone have updates on their multiple rootstock fruit trees? I'm especially interested in Kevin and Jackfruitwhisperer69's Frankenstein plants. I'm really interested in this technology. It is especially interesting how some of the Durian trees rootstocks died, possibly from Phytopthora and the tree and many of its additional rootstocks are still alive.
Earlier in this thread, someone asked about wether it's better to approach graft mango first and then graft the selected scion on top or graft the scion onto the single rootstock first and then approach graft. After performing many Double Stone Grafts, I've found it best to do it at the same time. See this thread:
http://tropicalfruitforum.com/index.php?topic=16549.0. As Kevin already mentioned, the younger green wood is easier to work with because it's more pliable and you get higher percentage of takes.
The Double Stone Graft technique for mango utilizes young mango seedlings in the copper leaf stage because at this stage, the seedling is still utilizing the seed as a food source. It seems reasonable to assume that most dicots will will be easier to approach graft very soon after sprouting due to the fact they will still be depending on the seed for energy.
Those interested may want to experiment with more difficult to graft fruiting plants utilizing earlier stage or newly sprouted seedlings. This may give better results for plants like Mangosteen. I would assume that many of us that have grafted Mangosteen have performed the grafts when the seedlings have formed several true leaves which I am guessing is past the ideal stage.
Simon