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Replying to @josecastillo

Now I wish I’d left it running longer, because about 20 minutes after this, it showed the moisture diffusing back up through the layers of soil. Alas, there are no more bone-dry plants in my house, so you’ll have to take my word for it. Code here: https://gist.github.com/joeycastillo/bc892226806f17a457060a02b5299ae4

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