Caladium Care: Surviving the Winter Dormancy

Overview

The Caladium, commonly known as Angel Wings or the Heart of Jesus, produces some of the most spectacularly colorful foliage in the entire plant kingdom. Native to the tropical rainforests of South America, it grows massive, paper-thin, arrow-shaped leaves that look like stained glass. The leaves are wildly painted in intense shades of neon pink, deep ruby red, brilliant white, and dark green.

While they are frequently grown outdoors in summer shade gardens, they make breathtaking indoor statement plants. However, growing a Caladium indoors requires understanding a critical aspect of their biology: they are not evergreen. They grow from an underground tuber (bulb). They put on a massive, explosive show of color all summer long, and then completely die back to the soil to sleep all winter. You must understand this dormancy cycle, or you will accidentally throw a perfectly healthy sleeping bulb into the trash.

The Winter Dormancy Panic

Every autumn, thousands of new Caladium owners panic. As the days grow shorter and temperatures drop slightly, the massive, beautiful leaves will begin to droop, turn yellow, and die one by one. The plant looks like it is failing.

Do not water it more. Do not fertilize it. The plant is simply going to sleep.

This is a natural, unavoidable dormancy. Once all the leaves have died, cut them off at the soil line. Stop watering completely. If you water the dormant bulb in the winter, it will rot and turn to mush. Store the dry pot in a warm, dark closet (above 65°F). In the spring, bring the pot back to a bright window, begin watering again, and within a few weeks, brand new spears will shoot up from the soil to start the cycle over.

Light Requirements: Fueling the Color

To produce their shocking neon colors, Caladiums require very bright, indirect light. An east-facing window is ideal. If you place the plant in a dark room, the leaves will emerge mostly green and leggy.

However, the leaves are literally paper-thin. They have absolutely zero protection against harsh heat. If you place a Caladium in a west or south-facing window with direct afternoon sun, the leaves will instantly scorch, bleach out, and develop massive, crispy brown burn holes.

Watering and Humidity (During Summer)

During their active summer growing phase, Caladiums are incredibly thirsty. The massive leaves transpire water rapidly. You must keep the soil evenly moist at all times. Water thoroughly the moment the top inch of the soil feels dry. If the soil dries out completely, the plant will collapse dramatically onto the floor.

They also require high humidity. If the indoor air drops below 50% humidity, the delicate edges of the leaves will crisp up. Keep the plant near a room humidifier or in a bright, humid bathroom.

Soil and Potting

Because they need to stay moist but rot easily, the soil must be rich but well-draining. A high-quality potting mix heavily amended with peat moss for moisture retention and perlite for drainage is perfect. Because they grow from bulbs, they prefer a wide, shallow pot rather than a deep one.

Toxicity

Caladiums belong to the Araceae family and are packed with insoluble calcium oxalate crystals. They are highly toxic to cats, dogs, and humans. If a pet bites into a leaf or stem, the microscopic crystals embed in the mouth and throat, causing immediate, excruciating pain, severe swelling, and vomiting. Keep them safely out of reach.