The Philodendron 'Lemon Saw' is a distinctive variety of Philodendron, known for its uniquely shaped, vibrant yellow-green leaves that give it its "lemon" moniker. The plant's leaves are serrated along the edges, reminiscent of a saw blade, hence the name 'Lemon Saw'. Like other Philodendrons, it's a tropical plant that can be a stunning addition to your indoor plant collection.

Here's a comprehensive guide to caring for a Philodendron 'Lemon Saw':

1. Light: Philodendron 'Lemon Saw' prefers bright, indirect light. Avoid exposing the plant to direct sunlight, which can scorch the leaves and fade the color. If your plant's leaves begin to look dull or the plant becomes leggy, it may be receiving too little light.

2. Water: Water your Philodendron 'Lemon Saw' when the top inch of soil feels dry to the touch. Overwatering can lead to root rot, a common issue with Philodendrons. When you water, do so thoroughly, allowing water to drain out of the bottom of the pot. Avoid letting the plant sit in standing water.

3. Humidity: Philodendrons generally appreciate higher humidity levels due to their tropical origin. However, they are fairly adaptable and can tolerate average home humidity levels. If you notice brown, crispy leaf edges, it may be an indication that your plant needs more humidity. Increase humidity levels by misting the plant, using a pebble tray filled with water, or employing a humidifier.

4. Temperature: Philodendron 'Lemon Saw' thrives in temperatures between 65-85°F (18-29°C). Avoid exposing the plant to sudden temperature changes or drafts, as these can cause stress.

5. Soil: A well-draining soil is essential for Philodendron 'Lemon Saw' to prevent waterlogging and root rot. A mix of peat moss, perlite, and indoor potting soil, or a pre-formulated aroid mix, will work well.

6. Fertilizer: Fertilize your Philodendron 'Lemon Saw' about once a month during the growing season (spring through summer) using a balanced houseplant fertilizer. Always water your plant before fertilizing to prevent root burn, and reduce or cease fertilizing during the winter months when growth naturally slows.

7. Pruning: Prune your Philodendron 'Lemon Saw' to control its size and shape. You can also remove any yellow or brown leaves to keep the plant looking its best.

8. Pests and Diseases: Watch for common houseplant pests such as spider mites, aphids, and mealybugs. If you notice any signs of pests or disease, treat the plant promptly using an insecticidal soap or a neem oil solution.

Remember, each plant is unique and may require slightly different care. Always observe your plant and adjust care as necessary. Happy growing!