How to Divide a Large Split-Leaf Philodendron

Assessing Your Plant

A 20-year-old split-leaf philodendron (Monstera deliciosa) with multiple woody trunks can be successfully divided to create smaller, more manageable plants. The key is ensuring each division has a healthy root system and foliage.

Division Process

1. Use a sharp, clean knife to cut through the base, separating the plant into sections. Each section should have roots and at least one growing point with leaves.
2. Plant each division in a new container filled with a high-quality, pre-mixed indoor potting mix.
3. Water thoroughly by placing the pot in a saucer, watering until the soil is saturated, letting it sit for 5–10 minutes, then discarding excess water.

Watering by Weight

After the initial watering, lift the pot to gauge its weight when fully moist. Wait to water again until the pot feels significantly lighter. Outdoors, check daily; indoors, check every 3–10 days depending on conditions.

Fertilizing and Care

During the growing season, fertilize weekly to monthly with a balanced liquid fertilizer. Keep divisions in bright, indirect light and maintain consistent moisture without waterlogging.

Timing and Success Tips

Spring or early summer is ideal for division, giving plants time to establish before cooler months. Don't worry if some leaves yellow initially—focus on root health. With proper care, each division will develop into a robust new plant.