Cold injury (specifically frost damage to the pistillate part of the flower) and nutrient deficiencies (particularly a lack of calcium or boron) will cause deformed strawberries to form. Feeding by tarnished plant bugs or certain types of mites will cause them.
Nubbins and button strawberries are caused by external, usually damaging agents. The button strawberries or nubbins are caused by external damaging agents, while the other deformities are more benign. Each type of deformity is caused by different agents and can be lumped together in general groups. The second type is referred to as cockscomb strawberries or fasciated strawberries. The nubbins and button berries are the first type. There are two main types of misshapened strawberries. The most common two names for such berries are “nubbins” and “button berries.” Of course, the more generic adjectives are also often applied: mutant strawberries, deformed strawberries, runt strawberries, monster strawberries, etc. There are different names for a deformed strawberry. Who wants to eat hideous fruit when nice, red, symmetrical fruit can be had? But, if you find yourself out in the strawberry bed picking your own deformed strawberries, here is what you need to know: Jump to: Hopefully, with the information contained within this post, you will never have to deal with your own mutant strawberries. And, unfortunately, deformed strawberries are a fact of life. org is dedicated to bringing light to all things related to the strawberry plant.
Have you ever seen those hideous, misshaped strawberries? If so, you might have wondered what causes deformed strawberries to be that way.