13 phases · 36 species · 2328 seasonal notes · Pacific Northwest, Zone 8b
The Calendar
Bonsai keeps a different calendar — thirteen phases instead of twelve months, read from buds and weather instead of dates. Turn the wheel to any season; every species answers.
Happening now · day 1 of 21 · Early Fall in 21 days
Late Summer
The heat loosens its grip. The trees bank energy for the season ahead.
155 notes across 28 species this phase
Watering
28 speciesBoxwood11 on the bench
Gradually reduce watering frequency slightly.
Japanese Maple 'Sharp's Pygmy'6 on the bench
Maintain consistent moisture as growth slows.
Dawn Redwood5 on the bench
Maintain regular watering; reduce slightly if heat drops.
Chinese Juniper3 on the bench
Stay consistent; don't allow drying out between cycles.
Colorado Blue Spruce2 on the bench
Consistent watering schedule. Begin tapering as temperatures cool slightly.
Coralbark Japanese Maple2 on the bench
Maintain consistent moisture as growth slows.
Bigleaf Maple1 on the bench
Maintain consistent moisture as growth slows.
Canyon Live Oak1 on the bench
Adjust as temperatures begin to moderate. Avoid letting soil dry out completely.
Copper Beech1 on the bench
Slightly reduce as heat subsides.
Creeping Juniper1 on the bench
Begin reducing watering slightly if temps drop.
Engelmann Spruce1 on the bench
Reduce frequency slightly as growth slows.
Ginkgo biloba1 on the bench
Continue consistent moisture, but avoid waterlogging.
Hall's Crabapple1 on the bench
Steady, consistent watering; reduce evening water.
Himalayan Juniper1 on the bench
Adjust to cooler nights. Don’t reduce too quickly—monitor closely.
Japanese Larch1 on the bench
Adjust with rain cycles; avoid overwatering.
Japanese Maple 'Bloodgood'1 on the bench
Maintain consistent moisture as growth slows.
Japanese Yew1 on the bench
Slightly reduce watering as temps begin to drop.
Lilac Sensation1 on the bench
Reduce frequency slightly if temps fall.
Procumbens Juniper Nana1 on the bench
Maintain high vigilance; root rot possible with overwatering.
Satsuki Azalea1 on the bench
Water deeply but slightly reduce frequency as temps dip.
Trident Maple1 on the bench
Maintain consistent moisture as growth begins to slow.
From the wider reference
Reduce slightly if temperatures drop, but monitor carefully.
Maintain consistent watering. Avoid water stress as temperatures begin to dip.
Maintain regular watering while preparing for slower growth.
Reduce watering slightly as growth slows.
European Smoketree, AKA Venetian Sumach
Maintain consistent hydration as days shorten.
Slightly reduce watering as growth slows.
Begin slightly reducing frequency as temps cool.
Feeding
27 speciesBoxwood11 on the bench
Apply last feeding of balanced or phosphorus-rich fertilizer.
Japanese Maple 'Sharp's Pygmy'6 on the bench
Apply phosphorus high feed to support root health.
Dawn Redwood5 on the bench
Resume full-strength feeding for root building.
Chinese Juniper3 on the bench
Last round of nitrogen fertilizer mid-month.
Colorado Blue Spruce2 on the bench
Apply one last dose of low-nitrogen fertilizer before fall dormancy.
Coralbark Japanese Maple2 on the bench
Apply phosphorus high feed to support root health.
Bigleaf Maple1 on the bench
Apply phosphorus high feed to support root health.
Canyon Live Oak1 on the bench
Resume low-dose feeding if growth resumes slightly.
Copper Beech1 on the bench
Resume light feeding if growth allows.
Creeping Juniper1 on the bench
Resume light feeding if growth recommences.
Ginkgo biloba1 on the bench
Resume mild feeding if growth slows.
Hall's Crabapple1 on the bench
Resumes with balanced mix as temps cool.
Himalayan Juniper1 on the bench
Resume low-nitrogen feeding late in this window if new growth starts.
Japanese Larch1 on the bench
Resume regular balanced feeding.
Japanese Maple 'Bloodgood'1 on the bench
Apply phosphorus high feed to support root health.
Japanese Yew1 on the bench
Apply final potassium-rich fertilizer to strengthen wood.
Lilac Sensation1 on the bench
Last feeding should be low nitrogen, high potassium.
Procumbens Juniper Nana1 on the bench
Resume feeding with balanced or low-nitrogen formula.
Satsuki Azalea1 on the bench
Stop nitrogen-rich fertilizers. Shift to low-N, high-K.
Trident Maple1 on the bench
Back off nitrogen; apply phosphorus-rich formula.
From the wider reference
One final feeding low in nitrogen to support buds.
Stop nitrogen fertilization mid to late phase. Use mild PK mix if any feeding is needed.
Final summer fertilization if needed.
Final seasonal feeding; phosphorus-rich.
European Smoketree, AKA Venetian Sumach
Final low-nitrogen feed to prepare for dormancy.
Final phosphorus-heavy feeding.
Last feeding with low-N fertilizer.
Repotting
1 speciesStill not advised.
Pruning
18 speciesDawn Redwood5 on the bench
Prune for refinement if growth has slowed.
Chinese Juniper3 on the bench
Light cleanup only.
Canyon Live Oak1 on the bench
Selective thinning of interior shoots to let light in.
Copper Beech1 on the bench
Light cleanup possible.
Creeping Juniper1 on the bench
Begin gentle thinning for shape correction.
Engelmann Spruce1 on the bench
Light cleanup pruning acceptable.
Ginkgo biloba1 on the bench
Light cleanup pruning if needed.
Hall's Crabapple1 on the bench
Light structural corrections; avoid shock.
Himalayan Juniper1 on the bench
Clean dead tips or unwanted growth. Avoid stress cuts.
Japanese Larch1 on the bench
Clean up weak shoots.
Lilac Sensation1 on the bench
Avoid major cuts; only tip prune if needed.
Procumbens Juniper Nana1 on the bench
Selective thinning may be done to restore airflow.
Satsuki Azalea1 on the bench
No major pruning. Allow tree to begin slowing.
From the wider reference
Avoid pruning. Allow buds to harden.
Remove water sprouts and crossing shoots. Avoid heavy cuts.
Tidy shape, avoid heavy pruning.
European Smoketree, AKA Venetian Sumach
Light trim if needed to maintain silhouette.
Remove weak or diseased shoots.
Wiring
10 speciesDawn Redwood5 on the bench
Last chance to wire before lignification for the year.
Chinese Juniper3 on the bench
Begin planning for fall rewiring if needed.
Creeping Juniper1 on the bench
Final chance for summer adjustments before hardening.
Engelmann Spruce1 on the bench
Can rewire if new growth has hardened off.
Hall's Crabapple1 on the bench
Start checking earlier wiring for bite.
Himalayan Juniper1 on the bench
Can begin wiring again cautiously if new growth hardens.
Japanese Larch1 on the bench
Still not advised.
Procumbens Juniper Nana1 on the bench
Check and remove wires that may be biting in.
From the wider reference
European Smoketree, AKA Venetian Sumach
Avoid new wiring; begin planning for fall/winter wiring.
Begin considering wiring for fall shaping if temps allow.
Buds & shoots
7 speciesCanyon Live Oak1 on the bench
Minor thinning to redirect energy for autumn growth.
Creeping Juniper1 on the bench
Balance shoot vigor.
Hall's Crabapple1 on the bench
Maintain silhouette and taper.
Himalayan Juniper1 on the bench
Pinch late flushes to keep pads tidy.
Japanese Larch1 on the bench
Remove excess shoots if crowding begins.
From the wider reference
European Smoketree, AKA Venetian Sumach
Let late growth mature; don’t force new flushes.
Halt trimming—let shoots harden.
Pests & disease
18 speciesDawn Redwood5 on the bench
Clean foliage and monitor for fungal buildup.
Chinese Juniper3 on the bench
Late season fungal issues; ensure good air circulation.
Colorado Blue Spruce2 on the bench
Continue monitoring and reduce spraying unless outbreaks occur.
Canyon Live Oak1 on the bench
Check for scale and mites. Treat early before overwintering.
Copper Beech1 on the bench
Begin hardening off by reducing nitrogen.
Creeping Juniper1 on the bench
Treat any lingering pests; watch for spider mites resurgence.
Ginkgo biloba1 on the bench
Monitor for late-season mildew or rust.
Hall's Crabapple1 on the bench
Inspect undersides of leaves regularly.
Himalayan Juniper1 on the bench
Treat fungal outbreaks early. Watch for needle browning.
Japanese Larch1 on the bench
Continue pest vigilance.
Japanese Yew1 on the bench
Clear any fallen debris. Fungal risks rise with damp.
Lilac Sensation1 on the bench
Clean debris around tree. Prevent fungal buildup.
Procumbens Juniper Nana1 on the bench
Second spike in spider mites or fungal outbreaks possible.
Satsuki Azalea1 on the bench
Watch for root rot signs. Soil must drain well.
From the wider reference
Clear dead foliage. Check for lingering pests.
Prepare for fall fungal issues. Clean fallen leaves.
European Smoketree, AKA Venetian Sumach
Continue mildew watch; prune for airflow.
Begin pest clean-up for fall.
Summer protection
11 speciesDawn Redwood5 on the bench
Remove shade gradually if cooling begins.
Chinese Juniper3 on the bench
Reduce full sun exposure during peak afternoon heat.
Canyon Live Oak1 on the bench
Shade may be reduced gradually.
Creeping Juniper1 on the bench
Reduce if nighttime temps fall.
Hall's Crabapple1 on the bench
Reduce midday sun exposure.
Himalayan Juniper1 on the bench
Ease off shading gradually.
Japanese Larch1 on the bench
Maintain partial shading.
Procumbens Juniper Nana1 on the bench
Continue shade until nighttime temps cool.
From the wider reference
Ease off shading gradually.
European Smoketree, AKA Venetian Sumach
Shade can be reduced gradually.
Phase out by end of month.
Winter protection
3 speciesJapanese Larch1 on the bench
Begin thinking ahead.
From the wider reference
European Smoketree, AKA Venetian Sumach
Plan shelter strategy for coming frost.
Prepare mulch or cold-frame strategy.
Wound care
4 speciesCreeping Juniper1 on the bench
Safe to prune again if temps stabilize.
Japanese Larch1 on the bench
Monitor and manage heat stress indicators.
From the wider reference
European Smoketree, AKA Venetian Sumach
Healing slows—seal even small wounds.
Sterilize tools and avoid late wounds.
Deadwood & jin
3 speciesCreeping Juniper1 on the bench
Resume if needed.
From the wider reference
European Smoketree, AKA Venetian Sumach
Can resume light carving if temps drop.
Safe again if temps drop and humidity rises.
Propagation
5 speciesCreeping Juniper1 on the bench
Take semi-hardwood cuttings.
Hall's Crabapple1 on the bench
Graft onto rootstock or try late cuttings.
From the wider reference
Still possible and cuttings still viable, but rooting slows by month’s end.
European Smoketree, AKA Venetian Sumach
End of useful cutting period.
Harden off rooted cuttings.
Development
16 speciesDawn Redwood5 on the bench
Focus on refining branch pads.
Chinese Juniper3 on the bench
Focus shifts to transitioning to fall.
Colorado Blue Spruce2 on the bench
Transition to energy storage phase. No heavy work.
Canyon Live Oak1 on the bench
Begin preparing for fall structural refinement.
Copper Beech1 on the bench
Shift toward preparing tree for dormancy.
Creeping Juniper1 on the bench
Resume minor styling and cleanup.
Ginkgo biloba1 on the bench
Hold off aggressive shaping; begin observing lignification.
Himalayan Juniper1 on the bench
Begin fall refinement strategy—balance apex and lower pads.
Japanese Larch1 on the bench
Strengthen branches through sun exposure.
Japanese Yew1 on the bench
Let growth mature naturally.
Lilac Sensation1 on the bench
Allow shoots to harden. No active shaping.
Satsuki Azalea1 on the bench
Let growth harden off. Begin preparing for dormancy.
From the wider reference
Let growth harden off naturally for autumn. Begin energy balancing.
Allow growth to harden.
European Smoketree, AKA Venetian Sumach
Begin wind-down of active development cycle.
Observe growth direction and balance.
Display
4 speciesCreeping Juniper1 on the bench
Safe for public view if conditions allow.
Japanese Larch1 on the bench
Keep brief and shaded.
From the wider reference
European Smoketree, AKA Venetian Sumach
Declining; foliage may start fading.
OK only in temperate conditions.