Succulents can become overgrown and root bound after a couple years of healthy growth. You can improve their appearance by lightly trimming the foliage, repotting them into a larger container with fresh soil, and ensuring light conditions and soil nutrients are optimal.
How to Repot Overgrown Succulents
Pulling from the base of the stem, gently remove all plants from the old container
Fill the new, larger pot partly with a gritty, well-draining soil like a cactus / succulent potting mix
Prune back any undesired leaves with a clean pair of scissors or pruning shears and arrange the plants in the new pot
Fill the pot the rest of the way with soil
Optional: cover the soil surface with a top dressing
Place in the Recommended Light Conditions (see succulent product page)
Leave dry 3-7 days, water deeply, then wait for soil to dry completely before re-watering