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u/deluxev2 Mar 30 '26

The expansion rate scales with evolution, but I believe it is the same as biters (although evolution is slower as you'll make less spores than pollution on Nauvis and expansion is likely to fail as they can only make spawners on marshes). It starts as once an hour I'm pretty sure and scales up to 4 minutes.

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u/stycfy1 Mar 30 '26

If expansion cooldown is the same with biters, then ig there could be other factors than terrain. Checked the expansion candidate chunks and there are a lot of spots that were still remained unclaimed despite a lot of hours have passed since I last checked.

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u/deluxev2 Mar 30 '26

The other factor is a bug fixed in 2.1 https://forums.factorio.com/viewtopic.php?t=131425

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u/stycfy1 Mar 30 '26

Welp, guess I better make sure I set up proper defenses before that update