Do they grow slowly because they have FMV, or are they just slow?
I think someone said to push the fertilizer to trees with FMV to strengthen them and help them combat the virus.
It looks like my little Black Madeira has FMV, but in spite of that, It decided to start sprouting out and it's grown 2 1/2" in about two weeks, I think. It lost half its roots in transit and I saw that when I repotted it and I was thinking it might go into shock, but instead, when it was put into its slightly larger pot, it took off growing some more. It has mis-shapen leaves, at least the first two are. The third looks all right. I have it in Fafard Professional Potting Mix. No fertilizer is in that mix. I hope it will continue to do well.
I also repotted a little Sicilian Black tree at the same time and after it was in the slightly larger pot, it decided to sprout its tip bud, too.
The trees are inside the house due to the cold temps we've been having.
Thanks,
noss