Planted a dwarf mulberry tree with the understanding that fruit size would be similar to that of non-dwarf varieties. Not so, two years in-a-row. Pencil eraser-sized fruit is what was borne since the tree was planted. Being a fan of mulberries, I am quite disappointed. Could I be doing something to retard fruit size or could this possibly be natural for this variety. (Sorry, I don’t recollect the variety’s name.) Any ideas from this limited info.? Thanks.
Dwarf Mulberry Tree
Certified GKH Gardening Expert
Most varieties DO produce similar sized fruit. How often do you fertilize? It is helpful to fertilize at least once per year. The soil pH could be off as well. Adding a handful of dolomitic lime to the top of the soil will help keep that stable.
Sometimes the first few years of fruit will remain under developed. Did you get a self fertile variety, or is it one that requires cross pollination? This could be an issue as well.
Here is an article no the care of mulberry trees: https://www.gardeningknowhow.com/ornamental/trees/fruitless-mulberry/how-to-grow-mulberry-trees.htm