I live in Canada and have several cacti and large agave plants. It's soon going to be time to bring them outside as the weather starts to warm up. They are potted in a mix of coconut fiber, sand, fast ...
It is generally advised against repotting a cactus while it has buds or flowers on it. My Mammillaria prolifera has just finished flowering and it really needs repotting. But since it's a self-fertile ...