Not sure if this is the problem… but a google search found this…
Growth slows in the winter as temperatures drop below freezing. If the temperatures fluctuate quite a bit, such as from cold to warm and back again in a period of only a few days, this repeated thawing and freezing can cause the bark of mulberry and other trees to crack.
Growth. Mulberry trees grow quickly, which is why they are so desirable as urban or landscape trees . However, this fast growth rate can lead to the bark splitting and cracking . This is most common in the spring, when the tree wakes up from its dormant winter state and begins to grow again.
I have not had that problem with my Illinois Everbearing Mulberry (not yet anyway)… but I just noticed this evening that a lot of my fruit is dropping. It has sized up, turned white, and now a lot of it is just falling off. Bummer. I had high hopes for lots of mulberries this year. Hope that gets better.
I have not had that problem, but can tell you this variety is very prone to grow well beyond the height you can reach to gather fruit. I topped mine several years too late and so it’s very much a challenge each year now to cut out the top growth. If I were to grow this tree again I would top it at @10’ and make all limbs spread outward or be pruned off! So maybe your event is a blessing. Go ahead and start topping it next spring and you will be able to pick fruit at a reasonable height.
Good call, thanks, I planned to possibly keep all my trees at a manageable height but since most of them are just newly planted I thought it best to let them get established before I did anything I.E a couple of years minimum.
Stupid question but Im gonna ask anyway.
What happens to the trunk diam. of the tree if you prune it? Does it stay slim or will it continue to get larger in diam?
I would assume it would stay slim because it dosent need to get any larger because the canopy overhead is kept at a minimum.
The best way I remember “picking” mullberries growing up was to put a sheet (not the nice ones for your bed) underneath the tree and giving the trunk/branches a shake. Our tree was huge so I’d climb into it and stand on a branch.