The “coffee cup plant” commonly refers to Radermachera sinica, a popular houseplant known for its attractive foliage. This guide provides care instructions to help your Radermachera sinica thrive indoors. While the actual coffee plant (Coffea arabica) is sometimes sold in similar small pots, this information is specifically tailored for the Radermachera sinica.
Understanding Your Coffee Cup Plant
Radermachera sinica, also known as the China Doll plant, is an evergreen tree native to subtropical mountainous regions of Asia. As a houseplant, it typically remains compact, showcasing glossy, vibrant green leaves divided into multiple leaflets. This gives the plant a feathery, delicate appearance.
Essential Care for Your Coffee Cup Plant
Light
Your Radermachera sinica thrives in bright, indirect light, receiving four to five hours of exposure daily. Placing it near an east or west-facing window is suitable. Direct, harsh sunlight can scorch its delicate leaves and lead to leaf drop. If natural light is insufficient, supplemental artificial grow lights can help the plant flourish.
Water
Consistent moisture is important for Radermachera sinica, but it is susceptible to root rot if overwatered. Allow the top inch or two of soil to dry out between waterings before rehydrating thoroughly. Ensure the pot has drainage holes to prevent water from sitting at the bottom.
Soil and Potting
A well-draining potting mix is important for Radermachera sinica. A mixture of peat moss, perlite, and well-rotted compost provides good drainage while retaining adequate moisture. These plants prefer to be slightly root-bound, so choose a pot similar in size or only slightly larger than its nursery container.
Temperature and Humidity
Radermachera sinica prefers consistent warmth, with temperatures ranging between 65 to 75 degrees Fahrenheit (18 to 24 degrees Celsius). Avoid placing the plant near drafts, air conditioning vents, or heating elements, as temperature fluctuations can cause stress and leaf drop. These plants appreciate higher humidity, which can be provided by misting, using a pebble tray, or placing a humidifier nearby.
Fertilizing
During its active growing season in spring and summer, Radermachera sinica benefits from regular fertilization. Use a balanced liquid fertilizer, such as a 10-10-10 or 20-20-20 formulation, diluted to half strength. Apply this fertilizer monthly or every two to three weeks, reducing frequency or stopping entirely during fall and winter when growth slows.
Addressing Common Coffee Cup Plant Problems
Common issues with Radermachera sinica stem from environmental factors or care inconsistencies. Prompt identification and adjustment can help restore plant health.
Yellowing Leaves
Yellowing leaves can indicate overwatering or underwatering. Overwatering leads to soggy soil and can cause root rot, while insufficient water causes leaves to turn yellow and become crispy. Check soil moisture to determine the cause and adjust your watering schedule.
Leaf Drop
Leaf drop is a common response to environmental stress, such as changes in light, temperature, or watering habits. If you have recently moved the plant or altered its care routine, it may be adjusting to new conditions. Maintaining a consistent environment helps stabilize the plant and prevent further leaf loss.
Leggy Growth
If Radermachera sinica appears stretched with significant space between leaves, it is not receiving enough light. Insufficient light causes the plant to reach for a brighter source, resulting in sparse, elongated stems. Moving the plant to a brighter location with more indirect light can encourage bushier growth, and regular pruning can help maintain a compact shape.
Pests
Radermachera sinica may attract common pests such as spider mites, mealybugs, and aphids. Inspect your plant regularly for signs of infestation, especially on the undersides of leaves. If pests are present, they can be treated using horticultural solutions like neem oil or insecticidal soap.