How often do harvesting spots recharge?
Scattered around the map, I've found a few harvesting spots where I can collect free resources. The tooltip says to "check back often" to see if harvesting is available.
I've found that they don't recharge daily or even at the same time. So how do they recharge? Is it a certain amount of time since they were collected from? Is it a certain number of battles fought? Is it random?

Best Answer
From my observations regeration rate is somewhat constant, but it's shared across all Harvestings Spots.
In the begining of the game, the two spots I had, were recharged almost every day, but now they recharge also almost daily, but it's often hard to find which one has recharged. I would also assume that recharging timer is 'ticking' faster then you play the game.
I also noticed that high-tier spots are recharging more often, then you are high level, so I would assume there are not 'purely' random.
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Answer 2
I tried testing this myself by allowing many sites to become charged at once, then harvesting them all. From what I can tell, they recharge basically at random. The earlier sites take a few days, while the later ones take a week or two. The node on the top of the mountain, for example, has only worked three or four times in the few months I've been playing, while the first shell comes up every few days.
My conclusion is that they recharge at some point within a set range, which has higher values for higher nodes. Something like 24-48 hours for early ones, and something like 14-21 days for advanced ones.
Source: A lot of very patient experimentation.
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Images: Tom Fisk, Pixabay, Quang Nguyen Vinh, Kelly
