Mountain Ash - Knowledgebase Question

Garland, ME
Question by dig99
September 30, 1999
Why doesn't my Mountain Ash grow berries?

Answer from NGA
September 30, 1999


If your tree produces flowers, it should develop berries at the end of the season. Sorbus (Mountain Ash) grows best in full sunshine with moderate amounts of water during the growing season. If your tree is young, it may take a few more years before it's mature enough to produce berries. If it's been established for 4-5 years and is still not blooming, it may need more sunshine or additional water during the growing season. Sometimes Sorbus bears heavily one year and not the next. Give your tree a little more time and be sure to provide enough water and sunshine to keep it healthy enough to bloom and produce fruit.

A comment from jjcoulter
May 6, 2018
I have an odd circumstance, I have relatively mature Mountain Ash that has produced an overabundance of flowers and fruit in years past but last year all four trees, planted in a grove had only a very few blossoms. This year they seem to be normal, what caused the fallow year? I would like to cause the same thing as the trees overproduce and nearly break down the trees.

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