Plants usually need to be repotted once a year, generally in the spring before they start to grow actively.
But if you notice the roots growing out of the drainage holes, it's time to repot.
You'll need a pot that's one size bigger than the current pot, potting soil, a trowel, and a watering can.
Gently tap the sides of the pot to loosen the soil and then gently pull the plant out.
You can also use a trowel to loosen the soil from the edges of the pot.
Clean the pot with hot water and soap, fill the new pot about a third of the way with fresh potting soil, and put the plant in it.
Use a pair of scissors to trim off any dead or yellowing roots.
You can also loosen the soil from the roots a little to give your roots a chance to spread a little easier in your plant's new pot.
Place the plant in the center of the new pot, making sure the top of the root ball is level with the rim of the pot.
Fill in the gaps around the plant with potting soil until it's level with the top of the root ball.
This gives the plant plenty of space to keep growing.
Water the plant thoroughly after repotting and then allow the soil to dry out slightly before watering again.
The amount of sunlight your plant needs will depend on the type of plant – check the care instructions for guidance.
Generally, once a year or every two years is enough for most plants, but some plants may need to be repotted more or less frequently depending on their growth rate.
Wait a few weeks after repotting before fertilizing to allow the plant to acclimate to its new environment.
You can then fertilize as usual according to the plant's care instructions.