Dynastes grantii care

Dynastes grantii care


  • Size: 35-85mm
  • Adult life span once ative: 3-5 months
  • Temperature: 68-77°F 
  • Humidity: 40-70%
  • Food: Beetle jelly or fruits(no ctirus)


  • Required temperature for breeding: 72-77°F
  • Minimum container size for egg laying: 8 in x 4 in x 8 in. Bigger containers are always the better option for breeding!
  • # of eggs laid on average: 20-80 eggs.
  • Flake soil humidity adjustment: The amount of water is appropriate when you can form a ball by squeezing the flake soil with your hand. Water seeping out of your hands during the process indicates that there is too much water.
  • Set-up: Pack the bottom 5cm of the container tightly and fill up the remaining space loosely with flake soil. Place objects such as sticks or barks at the top so that the beetle can flip itself over if needed. Lastly, don't forget to regularly change fruits or beetle jelly for the beetle to feed!

Set-up example: 


  • Food: Flake soil or white-rot hardwood.
  • Temperature: 70-77°F. 
    • Can keep them as low as 55°F but it will delay growth significantly.
  • Humidity: 60%
  • Larval duration: 10-20 months.
  • Container size recommendations:
    • L1: 4oz deli cup
    • L2: 16oz deli cup
    • L3/pupa: 32oz deli cup
    • Can keep them communally in a bigger container but raising them individually is recommended if you want bigger males. 

Personal notes:

  • Eggs can sometimes take up to 6 months to hatch. Keeping the eggs warm will make them hatch faster.
  • According to a Japanese breeder, keeping the eggs slightly dry and then humidifying them caused the eggs to hatch faster.
  • If the larvae are kept warm(75-77°F), they will turn into adults 12-14 months.
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