Instant Answer: A hydroponic gardening checklist should include essential items like a growing system (NFT, DWC, etc.), nutrient solutions, pH testing kit, and grow lights. Additionally, ensure you have a water source, air pump, and appropriate containers for your plants. Don't forget to include seeds or seedlings suited for hydroponic gardening. Lastly, monitor tools such as thermometers and humidity gauges to maintain optimal growing conditions.
