About fertilization schedule or regimen of the Black Madeira before and after planting in ground, it's all very scattershot. I typically root cuttings in potting soil or combined with perlite. Pure perlite would probably be safest, but I almost always shortcut, use potting soil, typically organic that has some kind of fertilizer in it. Then I get the rooted cutting into the ground as early as possible in spring. Some take off, some don't. If they don't I repot them and try to baby them. If they take off in ground like this Black Madeira did and many others have done, then I apply what I can, mulch, organic fertilizer, water, keep them happy. My guess: I don't think a cutting should grow this quickly, so the rapid growth induced stress enabled the FMV to appear. It's just a guess. I'm happy to live with the tradeoff of some scarred and deformed leaves, since in return, I've got a lot of wood there, some significant lignification already, and plenty of great leaves too, and a few figs if I want them which I don't in these its first months.
First frost typically hits in October sometime, I think, could be quite early, could be very late, maybe even early November I suppose. Or early October. I don't really winterize. I mulch somewhat at ground level. My figs are all mulched during the growing season anyway but many will receive the covering additionally of unchopped fall leaves, which act sort of as a tarp. Some may get additional wood chips. Last winter, very harsh, dozens of figs in ground, nothing survived above ground. But no trees died, zero as I recall, all came back. Many did not fruit, but I learned which ones did, or might do so, and even better, next year. Will see.
So if I don't winterize, what about all this year's growth? Well, I hope to take most of it off as three cloned trees headed for pots. The rest of the growth will become a few feet of cuttings which I'll sell or trade, some already committed. And I trained one trunk to run underground then re-emerge a couple feet away where it is now growing vertically as a distanced trunk. Never tried this before but my hope is that that slightly underground trunk will survive the winter and send up multiple vertical trunks next summer to create a bigger bush. An experiment.
Very reliable source for this cutting - will check whether or not acknowledgment is okay.