These items will respawn after being harvested. Note each day is 360 seconds long.

• Fruit - 2 days
  
• Ice - 4 days
  
• Wood - 5 days
  
• Plant - 8 days
  
• Root - 8 days
  
• Blueshroom - 8 days
  
• Dead Tree - 8 days

These items do not respawn.

• Ore
  
• Rubble (small rocks picked up with shovel)
  
• Rocks (big rocks mined with jackhammer)
  
• Scrap
  
• Artifacts (research objects)

Fruit trees can be picked with no tools (the fruit will grow back in 2 days) or chopped down with an axe. Chopping down the tree gives you some wood and a 25% chance of dropping a tree seed, which can be planted on a dirt tile to create a tree sprout.

The tree sprout will grow into a normal fruit tree in 6 days, or can itself be chopped down for 1 wood before it is fully grown. Chopped down fruit trees or sprouts do not appear to grow back.