Sunday, May 3, 2026

BRIX and pH Values in 42 Accessions of Mulberries

 All fruits were harvested on May1, 2026 from a single location in Sacramento Valley, California.

BRIX numbers reflect the dissolved sugars content, the higher BRIX, the more sugars are in the fruit. 

pH numbers reflect the acidity of the fruit.  The lower pH corresponds to more acid in the fruits.


We believe that all long white mulberries such as Australian Green, Pakistan White, Saharanpur Local and Unknown Long White are the same.  However, their BRIX numbers are different here. Australian Green is the most developed large tree, and Saharanpur Local is a small shaded tree on only a partially compatible rootstock. Pakistan White is a young tree and not shaded by other trees. Uknown Long White is a graft on a multigrafted tree. The tree health, and the sun exposure affect the BRIX numbers and possibly the pH too.

We also suspect that Tice and Estero Giant might be identical, while they produced different BRIX number.

Red Himalayan Taiwanese Long was at the very end of its fruiting, and normally has very long fruits similar Skinner.  Red Himalayan Murray's fruits are also normally longer, these were at the end of its season too.



In the below table, most selections were at their perfect maturity.  Only Four Seasons, Taiwanese Dwarf, Chiang Mai #60, and Buluklu will need to be reevaluated at a later date. 


The BRIX and pH data is based on 3 juiced fruits and two technical replicates. 

Australian Green and Pakistan White BRIX reading were above the upper range of the refractometer we used.  Their values are above 35.


BRIX data is an important component of fruit flavor, but the degree of acidity and various specific compounds will influence the final flavor perception too. The taste preferences are also different for different people.  

My evaluation of individual cultivars can be found here in this Playlist on YouTube https://youtube.com/playlist?list=PLiwjdtJGDLQcA0f5VTpgCIs9vaPh01iqe&si=gez5QHy43hiLLnSs

We sell cuttings for rooting or grafting from our website in winter and early June reallygoodplants.com


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BRIX and pH Values in 42 Accessions of Mulberries

 All fruits were harvested on May1, 2026 from a single location in Sacramento Valley, California. BRIX numbers reflect the dissolved sugars ...