Houseplant Annual Care Calendar — Monthly Watering, Fertilizing & Repotting Schedule

Foliage plants require changing their care methods according to the season. The frequency of watering and fertilizing differs greatly between the growing season and dormant period, and missing the proper timing can damage the plant's health. This article explains year-round foliage plant care on a monthly basis.

Spring (March–May): Preparation Period for Growth Resumption

March is when many foliage plants awaken from dormancy and begin resuming growth. Once temperatures consistently exceed 15°C, gradually increase the frequency of watering compared to winter. However, the key is to increase watering gradually, not by suddenly giving large amounts of water. April marks the beginning of the ideal repotting period. Plants with roots protruding from the pot's drainage holes or those not repotted for more than two years should be moved to a pot one size larger. Remove about one-third of the old soil and repot with fresh potting mix. If roots are densely packed, gently loosen the outer roots before repotting. May is when plants enter the full growing season, so begin fertilizing. Place slow-release solid fertilizer around the pot's edge or apply liquid fertilizer once every two weeks. Varieties that can be moved outdoors should gradually acclimate to the outdoor environment as temperatures stabilize. Sudden exposure to direct sunlight can cause leaf scorch, so begin with shade.

Summer (June–August): Peak Season Care

June marks the rainy season, creating high humidity. While most foliage plants prefer this humidity level, poor air circulation can lead to mold and disease. Space pots apart to ensure good air circulation. July and August are the peak growing season, when watering frequency is highest. In hot temperatures, soil dries quickly, sometimes requiring daily watering. Watering in the cool morning hours is ideal; giving cold water during the hot daytime can cause heat shock and damage roots. Continue applying liquid fertilizer approximately once every two weeks. However, if extreme heat above 35°C persists, plants become fatigued, so it may be necessary to reduce fertilizer. Watch for leaf scorch from direct sunlight and use lace curtains to filter light for windowsill plants. It's also important to keep plants away from direct air conditioning airflow. Propagation by cuttings is best from May to July.

Autumn (September–November): Preparation Period for Winter

September is still an extension of the growing season, but as temperatures begin to drop, gradually shift to autumn care mode. From October onward, reduce fertilizer frequency to approximately once monthly. By November, it's typical to stop fertilizing completely. Fertilizing plants entering dormancy risks nutrient burn because roots cannot absorb nutrients. Gradually space out waterings as well. Plants kept outdoors should be moved indoors before minimum temperatures drop below 15°C. Before moving them inside, check the undersides of leaves and inspect for pests. As dryness increases during this period, misting leaves improves plant condition. Repotting is possible until early September, but avoid it from October onward. If cold arrives before roots recover, it causes significant plant damage.

Winter (December–February): Dormant Period Care

December through February, most foliage plants enter dormancy, with growth nearly halted. The greatest risks during this period are 'root rot from overwatering' and 'cold damage.' Water only 2–3 days after soil is completely dry, reducing frequency to less than half of summer levels. Judging by pot weight is also effective—water only after the pot feels light. Heated indoor air is dry, so continue misting leaves. Windowsills become cold at night, so for cold-sensitive varieties, either move them away from windows only at night or insulate the pot with cardboard or foam. Stop fertilizing completely. Do not repot or propagate. In winter, the goal is simply to 'maintain the status quo'—prioritize getting plants through spring without letting them die.

Choose Seasonal Plants from Bri-Choku

Foliage plant care fundamentally requires following seasonal rhythms. At Bri-Choku, you can purchase from growers knowledgeable about plant cultivation and receive specific guidance on seasonal care suited to your plant. Especially for those growing foliage plants for the first time, it's reassuring to confirm the year-round care schedule with the grower at the time of purchase.