Repotting Guide · Early Winter
December closes the year on the bench but opens it in the mind. Almost everything is resting, so there is no repotting to chase — instead it is the ideal time to care for tools, take stock, and plan the spring campaign. In the warmest corners of the country, the very earliest signs of next season may even appear by month's end.
What to repot in DecemberAcross all four families we grow for — timing depends on watching your plant, not just the date.
Outdoor & Temperate Bonsai
Dormant. Clean and oil your tools, sharpen blades, sterilize pots, and map out which trees need repotting first when buds swell in late winter. Any structural wiring is best done carefully now while branches are bare and the design is easy to read. Warm zones may see the earliest larch or deciduous buds stir late in the month.
Tropicals & Tropical Bonsai
Holding steady indoors. Keep tropicals bright, water lightly, and avoid repotting in the short days. Guard against cold drafts and the parching dry air near heaters — sudden chills are the main winter threat to ficus and friends.
Cacti
Deep in dry, cool rest. Keep them bright and barely watered; do not repot. This dormancy is doing important work behind the scenes toward spring flowering.
Succulents
Mostly resting, while the Christmas cactus (Schlumbergera) takes center stage in full bloom. Enjoy the flowers and wait until late winter, after blooming, to repot it. Winter-growing aeoniums can be kept tidy but left in their pots.
Timing by USDA zone
Spring runs later as you go colder and earlier as you go warmer — shift the calendar to match your climate.
Full dormancy — tool care and planning season.
No repotting; protect plants and prepare for a late-winter start.
Earliest deciduous repotting may begin at month's end if buds are swelling.
🌱 Tip of the month
Use the quiet month to get organized: inventory your soil components, top up your Universal or Shohin mix, and pre-clean pots so nothing slows you down when the spring rush hits.
✨ Fun fact
Your Christmas cactus is a Brazilian rainforest native that grows in tree branches, not desert sand — which is why it likes a touch more moisture and humidity than its spiny desert cousins.
Soil for this month
Everything above drains fast and breathes — exactly what these plants want at repotting time.
A note on timing: plants don't read calendars. Use these months as a guide, but let the plant make the final call — repot deciduous trees as buds crack, conifers as new growth softens, and tender plants only while they're in active growth. Always step up just one pot size and match the mix to the plant.