Yellow leaves can make it hard to tell whether your houseplant needs water or is staying too wet. This digital worksheet kit gives first-time plant owners a clear way to investigate the signs instead of relying on a watering calendar. Start with the Yellowing Pattern and Leaf Age Reference to note which leaves are changing, then use the Below-the-Surface Soil Moisture Check and Dry Surface, Wet Root Zone Decision Worksheet to assess moisture deeper in the pot. If the root zone is dry, Root-Zone Watering Cues for Dry Soil helps guide your next watering decision. After making one evidence-based correction, use the Light, Temperature, and Plant Response Worksheet and Old Yellow Leaves vs. Continued Decline Decision Sheet to track what happens next. The kit focuses on yellow-leaf watering decisions, with light and temperature included as context; it is not a full guide to pests or propagation. Use the worksheets to organize what you observe, decide whether to water or wait, and check for signs of change without guessing from the calendar.