The recipe for "Rocket Fuel from Sulfur" does not seem to be working. It is labeled as a "Castra." But, when I try to craft it in a Chemical Plant or Cryogenic Plant, it says the temperature is too low.

Similarly, I cannot produce Rocket Fuel in a Factory with the normal recipe. It also says that the temperature is too low. That may be intended, though. The Factoriopedia says nothing about this recipe having a temperature limit.

As it stands, I can find no way to make rocket fuel on Castra. I have to import it from other planets.

Also, I can't craft the recipe "Reverse Oil Cracking," despite it also being a Castra recipe. The temperature is too low.

Is there some way to heat up my plants? I tried running Heat Pipes, but that doesn't help.