Bearss lime suffering (yes it's already in gritty mix)
My Bearss lime tree dropped most of its leaves over a year ago, around January 2011. I repotted in July in gritty mix, root pruning but no branch pruning. I watered and fertilized faithfully with FP 9-3-6. It put out a few -- VERY few -- new leaves. Then lost a few. It has even fewer now than a year ago, or when I repotted. Recently (last couple months) a few of the remaining leaves have developed brown triangle on the tips. It keeps putting out blooms, which tend to develop tiny limes that mostly drop.
I have read some university papers about citrus, which say that after defoliation, citrus require large amounts of nitrogen, and that nitrogen easily leaches from the soil, unlike some of the other nutrients which persist. I tried increasing my fertilizer, but I feel that it's all just draining out of the gritty mix. Or, nitrogen is leaching out, but other nutrients are persisting.
Anyone have any hope to offer for this poor tree?