Repotting Guide · Early Spring
March is the heart of the temperate repotting season. Buds crack, roots surge, and the window you have been waiting for swings wide open for hardy deciduous trees and conifers. This is the busiest bench month of the year for traditional bonsai — work efficiently, because the window for any single tree is only a couple of weeks.
What to repot in MarchAcross all four families we grow for — timing depends on watching your plant, not just the date.
Outdoor & Temperate Bonsai
Prime time. Repot deciduous species as their buds crack and show green or red: Japanese maple (Acer palmatum), trident maple, hornbeam (Carpinus), beech (Fagus), and Chinese elm. Junipers and pines (Pinus) follow a little later as new growth firms up. Hold azaleas until after they flower — they also prefer an acidic substrate rather than the standard mix.
Tropicals & Tropical Bonsai
Rising light brings tropicals back to active growth. Late March is a fine time to repot ficus, dwarf jade, and Fukien tea (Carmona retusa), especially in warmer regions.
Cacti
Growth is resuming. As the desert genera wake — Mammillaria, Gymnocalycium, Echinopsis — you can begin repotting, stepping each plant up just one pot size. Resume watering gradually.
Succulents
A great month to repot spring growers: Echeveria, Aloe, Haworthia, and Sedum. Refresh tired soil and divide crowded clumps now so they fill out over the coming season.
Timing by USDA zone
Spring runs later as you go colder and earlier as you go warmer — shift the calendar to match your climate.
Season is just opening late month; watch for bud swell on maples and elms.
Peak deciduous repotting window — do not miss it.
Wrap up deciduous early; conifers, tropicals, cacti, and succulents are all in play.
🌱 Tip of the month
Bare-root and rake out old soil on deciduous trees, but never let the roots dry out — keep a spray bottle handy and pot up promptly into free-draining mix.
✨ Fun fact
A Japanese maple's swelling buds blush red before a single leaf opens — that color is your cue that the roots are active and it is safe to repot.
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.