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Use a clay pot with a good drainage hole at the bottom. They are heavy and less likely to topple over. The clay pot also breathes through its sides, reducing the possibility of root rot from over-watering. Use a 1 or 1 1/2 size larger pot than the one the plant is currently in. Too large a pot can result in over-watering problems.
Use a well-drained potting medium. Purchase a pre-packaged one made for cacti and succulents or prepare your own by mixing equal amounts of sharp sand and commercial potting soil. Adding a bit of bonemeal to the soil promotes a healthy root system.
When repotting the plant, remove any excessively long roots, especially those that may be wrapped in a circle around the base of the rootball. Use a sharp knife or sharp pruners and cut them off right next to the rootball. Also, remove any damaged or rotten roots at this time. If possible, try to remove some of the old compost from the sides and bottom of the rootball, being carefull not to damage too many of the fine feeder roots. Put some soil in the bottom of the pot, set the rootball on this soil and gently firm the soil around the rootball as you continue filling the sides of the pot with soil. Do not pack it in. Plant it at the same depth as it was in the old container. Wait for a few days before watering the plant (this gives the cut end of the roots a change to callous) and then thoroughly soak the soil. Never let the pot sit in the excess water as this can lead to root rot problems.
The plant can be fed weekly during the growing season if the fertilizer is diluted to 1/4 strength recommended by the manufacturer of the product. The best fertilizer for members of the Crassula family is one that is high in phosphorous. A water soluble 15-30-15 is a good choice.
