I used mod - Farmers Delight. And use Rich Soil for my Farm. After planting trees from your mod, a block of Rich soil, after a while the block is replaced by a block of dirt. This was not the case with standard and fruit trees from other mods.

I do not know what this is related to. Maybe with checking the soil under the tree, maybe with the root system. Jacaranda and Fir created a conflict.

Do you have an issue created for BOP? I am curious to see how it was resolved