How do I deal with plant disease and hard growing conditions?

You've learned to care for most of what you grow, and that's no small thing. But disease and bad conditions humble everyone who works with living things. A plant isn't a machine you can fix by will. Sometimes you do everything right and it still fails, and that's not a verdict on you. The difference between you now and you as a beginner isn't that you'll save every plant. It's that you'll read the signs earlier and act sooner. Disease is usually a plant telling you something about its water, its soil, its light, or its neighbors. The skill you're missing isn't a cure. It's learning to notice the small changes before they become a crisis. Start keeping a simple record. When a plant struggles, note what you saw, what you tried, and what happened. Over seasons that record becomes your teacher. The hard cases stop being mysteries and start being patterns you recognize. You won't win every time. Nobody does. But you'll lose far fewer.