U.S. Patent PPAF
Southern Highbush Blueberry Variety

General Description




  • Cultivar name: Colossus (selection code FL11-35)

  • Region best adapted to: north-central Florida (although may also do well in certain areas of central Florida with sufficient chilling)

  • Production system: deciduous – in trials performed somewhat better with a low dose of hydrogen cyanamide

  • Hydrogen cyanamide: very low doses or no application

  • Machine Harvestability: If needed, can be harvested by machine during April for fresh market

  • Per plant yields: 

            o   north-central FL (2019) – 12 lbs/plant

  • Known disease susceptibility: none observed to date

  • Known pest damage susceptibility: none observed to date


  • Fruit quality data:

    • Fruit firmness: average 268g/mm, a little higher than 'Emerald' provides flexibility in harvesting time

    • Berry Weight: average 3.2 grams, larger than 'Emerald'

    • Berry Diameter: average 20 mm, larger than 'Emerald'

    • Brix:  average 11.7, similar to 'Emerald'

    • Brix/Acid Ratio: 

    • Fruit scar:

    • Wax/bloom: 

    • Fruit defects: 

    • Flavor: 

    • Aroma: 

  • Cultivars similar flowering time:

  • Other information:

         o late bloom

            o short bloom to ripening period

            o concentrated ripening

            o good natural early leafing

            o great early yield potential (fits well with FL market window)

            o may require freeze protection in late January

         harvesting should be done when desirable Brix/acid ratio is achieved

            o late bloom

Performance 2018-2019 Season
Colossus_Citra FL_2019
Colossus_Citra FL_2018
Colossus_South FL_2019
Colossus_South FL_2018
Colossus_Central-North FL_2019
Colossus_Central-North FL_2018
Colossus_Central FL_2019
Colossus_Central FL_2018

Fruit Quality and Yield

The following plots show the most important fruit quality traits and yield, across the season.

The vertical lines in the yield plots indicate when 10%, 50% and 90% of the harvest was achieved during the season.


Dotted lines indicate the desired values for new cultivars:


  • Berry weight greater than 2g

  • Fruit Diameter greater than 14mm

  • Firmness higher than 150g/mm

  • Brix higher than 10%

  • TTA less than 1%

  • Brix/TTA higher than 14 units


Warning: Yield plot coming from harvesting of two bushes. Values may seem overestimated as all the fruit from the bush is harvested, and because this is harvest yield and no packed yield. Use this data to compare among cultivars and no to predict potential yield on your farm.


Measurements are in grams (g). To convert from grams to pounds (lb) use the following formula:

lb of fruit per bush = (g of fruit) x (0.002204)

Colossus Gallery
License Availability

For licensing availability contact Florida Foundation Seed Producers (FFSP):​​

Terms of use
Social Links
  • Google-Scholar-logo_edited
  • Research Gate
  • Twitter Social Icon
  • LinkedIn Social Icon