Delta, by fresh earth - do you literally mean ground soil in your pots?
Not to harp on ya or anything, just if it is regular dirt you may end up with issues... Trust me, I didn't follow advice once and learned my lesson - earth dirt is wonderful in the ground, but becomes evil in pots! (The drainage and composition just isn't compatible with such confined spaces - that is unless it's the dirt of the one and only person I've seen it successful with ... Who was from Medellin Columbia . I couldn't believe the natural soil that guy had, absolutely astonishing to say the least!)