Winter flowering plants usually need more water, while plants that are not blooming need less. Check the soil regularly and thoroughly water when the soil feels dry, until water drains from the drainage hole of the pot.
Plants that receive plenty of light in other seasons may need to be moved to a brighter location or have natural light supplemented by a light bulb for houseplants. If your plant looks leggy or spindly, this may be the reason.
Dry indoor air can be tough on houseplants. Increase humidity by grouping plants together on a humidity tray. You can make one by filling a saucer with pebbles and water. Simply place the plants on top of the pebbles, and as the water evaporates it will increase the humidity around your plants.
Reduce fertilization of plants that are not actively blooming during this time.
The cool temperatures of January induce flowering in many orchid species.
Check the leaves of your houseplants for insect problems like scale, mites, gnats and mealy bugs. If you detect a problem, bring a sample to our plant clinic for diagnosis and treatment solutions.
Look for roots protruding from the drainage holes or up over the top of your houseplant pots. If this is happening, repot your plant to a larger pot.
Visit or blog post on common winter houseplant issues for more detail about watering, repotting, light and pest issues.