Repotting plants is inevitable.
First, select a new pot that's a bit bigger but not too big. A small plant in a big pot will likely drown in a sea of soggy soil.
If the new pot is terra cotta, soak it first. Immerse it in a bucket or trashcan filled with water. Clay pots are porous so they need to be soaked. Otherwise the dry pot walls will wick moisture away from the roots of your plant. When you soak the pot, leave it in the water until the bubbles cease. This means it's totally saturated and ready to use. Plastic and glazed pots aren't porous, so no soaking is required.
When taking the plant out of its pot, use gravity. Don't yank. Turn the whole thing upside down and gently ease it out. If it refuses to budge, use a serrated knife. Use the blade to loosen roots away from the pot walls. Just run it all the way around the inside wall of the pot.
Put the plant in the new pot. Add soil at the bottom so that it's growing at the same depth it was. Fill in around the outside. Wetting the soil first is advisable. Use a premium potting soil. Avoid cheap "soil" that's actual ground up wood chips. This is not soil.
Water the plant thoroughly. Fill in with additional soil as it settles.
Use a saucer underneath the pot. Excess water will collect there. As it evaporates, it will provide much-need extra humidity for the plant.
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