When selecting a pot for a Rhubarb, consider the following factors: 1. Size: Rhubarb plants require a deep pot with a capacity of at least 20 gallons. 2. Drainage: Ensure the pot has proper drainage holes and a saucer to avoid waterlogging and root rot. 3. Material: Choose a pot made of a sturdy material such as terracotta, ceramic or plastic. These materials promote healthy root growth. 4. Location: Place the pot in a location that receives at least 6 hours of direct sunlight and has adequate air circulation. 5. Soil: Use well-draining soil with plenty of compost and organic matter for optimal growth. 6. Watering: Water regularly and deeply, keeping the soil moist but not waterlogged. 7. Fertilizer: Apply organic fertilizer every 4-6 weeks during the growing season.