Quote:
Originally Posted by barnetmill
How compatible are the red, white, and black mulberry species for interspecific grafting. ... ?
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Sounds like a fun experiment. True Mulberries (Morus) are vigorous plants so its worth a try. For nursery stock, I have cultivars grafted on seedlings of the same species.
This recommendation is for an established tree at least 6' high and wide:
Consider feeding your Mulberry tree "net 1 pound" of Potash over the active growing season this year and see if it improves of the size and quality of the fruit. For example: Potassium sulfate is usually 50% potash (0-0-50) by weight, so 2 pounds of K2SO4 will supply the tree with "net 1 pound". I would sprinkle about 1/2 pound around the canopy drip line each month for the next 4 months.