U.S. Patent PPAF
Southern Highbush Blueberry Variety

General Description

Colossus is an early season cultivar that produces jumbo fruit developed for hand and machine harvesting. Key attributes are:

  • ​Size is very large to jumbo

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

  • Early bloom, similar to Optimus

  • Short bloom to ripening period

  • Concentrated ripening

  • Good natural early leafing

  • Great early yield potential, fits well with FL window

  • Very firm fruit, stay firm for long period

  • Very good fruit firmness gives flexibility in harvesting time

  • Harvesting should be done when desirable Brix/acid ratio is achieved

  • May require freeze protection in late January

  • Use only very low doses of hydrogen cyanamide (Dormex) or no application

Fruit quality under optimal picking conditions (average of several years):

  • Large to jumbo fruit - Weight/Size (3.20 grams/20 mm), larger than ‘Emerald’

  • High Fruit Brix levels (11.7), better than ‘Emerald’

  • Very high fruit firmness (268 g/mm), better than ‘Emerald’

Performance 2018-2019 Season

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):​​

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