Seasonal plant care calendar, what to do month by month

Houseplants follow the seasons even when we picture them cut off from outside. Light, temperature, and humidity all shift through the year, and care has to follow. Here is the complete monthly calendar so you do not miss anything.

The big picture

Two functional seasons from the plant’s perspective:

• Growing season: spring + summer. More frequent watering, fertilizer, pruning, repotting.
• Resting season: fall + winter. Reduced watering, no fertilizer, no repotting.

Everything else flows from this logic. Now the details.

Winter, December to February

January

• Cut waterings to the minimum. Once every 3 weeks for most plants, longer for succulents.
• Move plants away from direct heat sources (radiators, fireplaces).
• Air the rooms 5 minutes a day, even in winter, to avoid stagnant humidity.
• Wipe leaves with lukewarm water to remove dust that blocks photosynthesisPhotosynthesisProcess by which a plant turns light into energy, taking in carbon dioxide and releasing oxygen..
• Watch for pests: dry air is paradise for spider mites and mealybugs.

February

• Still no fertilizerFertilizationFeeding the plant nutrients (nitrogen, phosphorus, potassium) through liquid or solid fertilizer to fuel growth..
• First signs of growth on some plants (young leaves, new stems): normal, daylight returns.
• Prep your gear for spring: pots, substrate, fertilizer.
• Take cuttings if you want, some species restart.

Spring, March to May

March

• Gradually resume waterings based on each plant’s needs.
• First repottingRepottingMoving a plant to a new pot and refreshing its substrate, usually every one to two years. of the year if needed (roots out of the pot).
• First fertilizer possible at half-dose, just once this month.
• First shape pruning.

April

• Peak repotting month. Best moment for nearly every species.
• CuttingsCuttingA piece of stem or leaf rooted to grow a new plant identical to the mother plant.: ideal conditions, maximum success rate.
• Fertilize every two weeks for actively growing plants.
• Pinching to encourage branchingBranchingWhen new stems grow off a main stem. Pinching or cutting just above a node usually triggers it..

May

• Rotate pots regularly, light coming in at changing angles can tilt the plants.
• Watch for thrips and other spring pests.
• You can take some plants outside (Ficus, palms), gradually acclimating them.

Summer, June to August

June

• Watering at peak, sometimes twice a week for the largest plants.
• Watch evaporation: a terracotta pot outside can dry in a day.
• Morning misting for tropicalsTropical plantA plant from warm, humid regions. It enjoys steady warmth and bright indirect light..
• Fertilizer still active, half-diluted.

July

• Indoor plants: pull them away from sun-blasted windows between noon and 4 p.m., the rays come through and burn.
• Outdoor plants: watch for sunburn. Mist in the morning, never at noon.
• Plan vacation watering setup based on trip length.

August

• The riskiest period for water shortage. Ask a neighbor if you are gone more than 5 days.
• No repotting in extreme heat, wait until end of month.
• Reduce fertilizer if it is very hot (above 86°F), the plant slows down defensively.

Fall, September to November

September

• Bring back inside the plants that summered outside (they hate nights below 54°F).
• Inspect under each leaf before bringing in: no hitchhiking pests.
• Gradually reduce waterings, growth slows.
• Last pruning of the year possible if needed.

October

• Fully stop fertilizerFertilizationFeeding the plant nutrients (nitrogen, phosphorus, potassium) through liquid or solid fertilizer to fuel growth..
• “Cool snap” mode for orchids: move your Phalaenopsis to a 60-63°F room at night for 3 weeks to trigger the next bloom.
• Clean the foliage. Heating season will bring lots of dust.

November

• Heating turns on: watch ambient humidityAmbient humidityHow moist the air around the plant is. Many tropicals like 50% humidity or more. drop. Misting or humidifier.
• Space waterings further.
• Watch for first signs of winter stress: yellowing leaves, dry tips.

Visual recap by season

Action	Winter	Spring	Summer	Fall
Watering	Minimum	Regular	Maximum	Reduced
Fertilizer	None	Every 2 wks	Every 2 wks	None
Repotting	No	Yes (ideal)	Possible	No
Pruning	No	Yes	Possible	Possible
Propagation	Hard	Ideal	Good	Possible
Outdoor stays	No	From May	Yes	Bring in by Sept.

Adapt to your home

This calendar is a reference for a temperate apartment. Adjust based on:

• Your climate: in Marseille, spring starts in February. In Minneapolis, in April.
• Your home: a heavily heated apartment in winter needs more water than a cool room.
• The species: a cactus does not follow the same calendar as a Calathea.

Plenova handles timing for you

Plenova automatically adjusts watering and fertilizer reminders by season and species. You stop thinking about the “when”, the app does it for you. You just do the action at the right moment.

Following the seasons is the difference between a plant that survives and one that thrives. It is also the natural rhythm that makes plant care so calming: a little each week, never a lot at once.